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LMR36503RS3QRPERQ1 - 65V 0.3A Sync Buck Converter | TI
The Texas Instruments LMR36503RS3QRPERQ1 is an automotive-qualified synchronous buck DC/DC converter delivering up to 300 mA from a 3 V to 65 V input, with a fixed 3.3 V output, housed in a 9-pin VQFN-HR (RPE) HotRod package measuring 2 mm × 2 mm. The wide 3 V to 65 V input range tolerates automotive load-dump transients, and the 2.2 MHz typical switching frequency enables a sub-100 mm² total solution size using only a small inductor and ceramic output capacitors. A buck (step-down) DC/DC converter is a switched-mode power supply topology that efficiently converts a higher DC input voltage to a lower DC output voltage by chopping the input with a switching element and averaging the result through an LC low-pass filter. The synchronous variant replaces the freewheeling diode with a low-side MOSFET to reduce conduction loss and improve efficiency at light loads. Within the power-management hierarchy, this part sits as a non-isolated point-of-load (PoL) regulator, beneath PMIC and system-rail controllers, and is engineered for distributed power in space-constrained automotive modules. Key specifications include 4.2 µA quiescent current at no load for low-Iq standby, 65 V absolute maximum input for load-dump survival, AEC-Q100 Grade 1 qualification for -40 °C to +150 °C operation, internal compensation that removes the need for an external compensation network, and a PFM-to-PWM auto-mode transition that optimizes efficiency across the entire load curve. The integrated MOSFETs eliminate external switches, while the RT pin allows external programming of switching frequency when finer EMI control is required. The HotRod flip-chip package removes bond wires from the critical switching loop, lowering parasitic inductance and reducing switch-node ringing. This architectural choice, combined with frequency dithering and spread-spectrum options, helps the converter meet CISPR 25 Class 5 EMI limits in sensitive automotive radio and sensor modules. Internal soft-start, cycle-by-cycle current limit, and thermal shutdown with auto-retry provide layered fault protection without external supervisor parts. Typical applications include automotive body electronics and LED lighting drivers, ADAS sensor power rails (camera, radar, lidar front ends), industrial 24 V PLC I/O modules, and always-on battery-connected subsystems that demand low quiescent current during key-off sleep. In all of these use cases the wide Vin tolerance and small footprint allow placement directly beside the load. When designing with the LMR36503RS3QRPERQ1, choose the inductor so that its ripple current stays in the 20-40% range of the 300 mA load rating, and place both input and bootstrap capacitors within 2 mm of the package to minimize the high-frequency loop area. Verify worst-case thermals at VIN = 60 V and IOUT = 300 mA to ensure the junction stays below the 150 °C AEC-Q100 ceiling. This page consolidates distributor pricing, pin-compatible TI family variants, and practical design notes (loop-area minimization, RT-pin frequency programming, EMI layout) that are not present together on the manufacturer datasheet.
LMR36510ADDAR - 65V 1A Sync Buck Converter | Texas Instruments
The Texas Instruments LMR36510ADDAR is a 1 A synchronous step-down (buck) DC/DC converter from the SIMPLE SWITCHER family, accepting a 4.2 V to 65 V input and delivering an adjustable output from 1 V up to near VIN, all in an 8-pin PowerSOIC (DDA) package with an exposed thermal pad. The device integrates both high-side and low-side MOSFETs, eliminating the need for an external Schottky diode, and achieves peak efficiencies above 90% across a wide load range. A buck converter (step-down switching regulator) is a type of DC-DC converter that uses PWM control with an inductor and capacitor to convert a higher DC voltage into a lower DC voltage with high efficiency. Unlike linear regulators, which dissipate excess voltage as heat, buck converters switch the input at high frequency (typically hundreds of kHz to a few MHz), filter the switched waveform through an LC network, and regulate the duty cycle to maintain a stable output. They belong to the broader hierarchy of voltage regulators -> power management ICs -> power management, and are essential whenever a system must derive multiple lower supply rails from a higher-voltage bus such as industrial 24 V, automotive 12 V/24 V, or distributed 48 V rails. Key features include 26 uA quiescent current for light-load efficiency (ideal for battery-powered or always-on systems), 400 kHz default switching frequency, internal compensation, and a PGOOD indicator for power-rail sequencing. The HTSSOP-8 PowerPAD package offers low theta_JA for improved thermal performance in continuous 1 A operation. The LMR36510 also integrates cycle-by-cycle current limit, thermal shutdown, and UVLO protection, reducing external component count and BOM cost. The LMR36510 is part of TI's pin-compatible SIMPLE SWITCHER family that includes the 2 A LMR36520 (same 65 V rating) and the 36 V LMR33610/LMR33620/LMR33630/LMR33640 (1 A/2 A/3 A/4 A), enabling designers to scale current across product families without changing PCB layout. This scalability simplifies multi-product platform designs and reduces time-to-market across industrial, automotive, and communications applications. Typical applications include industrial 24 V/48 V sensor and actuator power, building automation, PLC I/O, security camera IR-LED and PoE rails, battery management, and aftermarket automotive electronics where wide input voltage tolerance is essential. When designing with this part, place the input capacitor as close as possible to the PVIN and PGND pins and use a low-ESR ceramic bypass on the BOOT pin to guarantee proper high-side drive. A 22 uF or larger input capacitor is recommended for 24 V/48 V bus operation; verify inductor saturation current at the LMR36510's peak current limit. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.
LMR36510FADDAR - 65V 1A Sync Buck Converter | Texas Instruments
The Texas Instruments LMR36510FADDAR is a SIMPLE SWITCHER 4.2-V to 65-V, 1-A synchronous step-down DC/DC converter with 26-uA quiescent current, integrated high-side and low-side MOSFETs, and adjustable output voltage down to 1V, housed in an 8-pin PowerSOIC (DDA) package with 0.154-inch (3.90 mm) body width. It delivers up to 1 A of continuous output current across a wide 4.2 V to 65 V input range, with transient tolerance up to 70 V to protect against automotive load-dump and industrial surge events while simplifying external input protection circuitry. A buck converter (also called a step-down switching regulator) is a type of DC-DC converter that efficiently reduces a higher DC input voltage to a lower DC output voltage using a controlled switching element, an inductor, a capacitor, and a rectifier. Compared to linear regulators (LDOs), buck converters achieve substantially higher efficiency because power dissipation is minimized during switching transitions rather than being continuously burned off as heat. The LMR36510 belongs to the broader category of synchronous buck converters, meaning the rectifying diode is replaced by a second MOSFET to further reduce conduction losses and improve efficiency, especially at high currents and low duty cycles. Key features include 26 uA quiescent current for standby energy compliance, integrated 65 V MOSFETs that eliminate external switches, a 70 V transient-tolerant input for surge immunity, and a peak current-mode control topology that simplifies loop compensation and provides cycle-by-cycle current limiting. The device also offers a PGOOD indicator output, an enable pin with wide-input UVLO threshold, and internal soft-start, all packed into an exposed-pad 8-pin PowerSOIC package that provides a low thermal resistance path for continuous 1 A operation. The LMR36510 uses peak current-mode control with internal compensation, which provides stable operation across a wide range of input voltages, output voltages, and load currents without requiring external compensation components. The fixed switching frequency (400 kHz for the F variant) is set internally to keep the fundamental and harmonics out of sensitive AM-band frequencies. The integrated MOSFETs are rated for 65 V drain-to-source breakdown, giving substantial headroom over the 65 V maximum continuous input rating. Typical applications include industrial sensor and PLC power supplies, building automation, 24-V industrial bus systems, battery-powered equipment, and low-power always-on consumer loads that need to survive 48-V telecom transient surges. The wide input range and 70-V transient capability also make it well suited for automotive load-dump scenarios where the input rail can momentarily exceed nominal battery voltage. When designing with this device, note that the PowerSOIC exposed pad must be soldered to a sufficient ground-plane copper area to keep junction temperature within the 125 C limit. Use the WEBENCH Power Designer tool to evaluate loop stability, inductor ripple, and efficiency trade-offs for a given VIN/VOUT/IOUT combination. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides, helping engineers shortlist parts and reduce BOM risk.
LMR38025SDRRR - 80V 2.5A Sync Buck Converter | Texas Instruments
The Texas Instruments LMR38025SDRRR is an 80 V input, 2.5 A continuous-output synchronous step-down (buck) DC/DC converter housed in a 12-pin WSON (DRR) package with exposed thermal pad. It integrates the high-side and low-side power MOSFETs, supports 4.2 V to 80 V wide-Vin operation, and switches at 400 kHz fixed frequency with optional spread spectrum for EMI mitigation. What is a synchronous buck converter? A synchronous buck (step-down) DC/DC converter is a switching voltage regulator that uses two actively-switched MOSFETs (one high-side, one low-side, replacing the lossy Schottky diode of older designs) to convert a higher DC input voltage into a lower regulated DC output voltage. The LMR38025 belongs to the SIMPLE SWITCHER power-converter family, which sits inside the broader hierarchy: DC/DC converter -> switching regulator -> voltage regulator -> power management IC. Synchronous buck designs are preferred over linear regulators when the input-to-output voltage differential is high, because efficiency approaches 95% rather than dissipating VIN-VOUT as heat. Key features include an ultra-low 40 uA typical operating quiescent current for light-load efficiency, a power-good flag with built-in filtering and delay to indicate true system status, a high-voltage enable pin supporting either direct Vin connection or precision UVLO via external resistor divider, internal loop compensation, and internal soft-start. The WSON-12 package with exposed pad delivers a low thermal resistance for sustained 2.5 A delivery in industrial ambient conditions. Architecturally, the LMR38025 uses peak-current-mode control with internal compensation, which simplifies PCB layout by eliminating external compensation components and provides inherent line-rejection and cycle-by-cycle current limiting. The optional spread-spectrum modulation dithers the switching frequency to spread peak EMI energy across a wider band, easing CISPR 25 / FCC Class B compliance in noisy industrial or MHEV/EV environments. Typical applications include 24 V industrial automation rails, factory sensor and actuator supplies, building automation, battery-powered telecom equipment, mild-hybrid electric vehicle (MHEV) auxiliary subsystems, and any point-of-load requiring regulation from a wide 12 V/24 V/48 V bus down to 3.3 V or 5 V. The 80 V abs-max input also tolerates load-dump transients commonly seen on 24 V truck and industrial buses. When designing with the LMR38025, ensure the input capacitor handles the RMS ripple current and place it as close as possible to the VIN and PGND pins. The exposed pad must be soldered to a sufficiently large copper pour (>=100 mm^2) to keep junction temperature within the 150 C abs-max rating under worst-case ambient. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement - but are not duplicated in - the manufacturer datasheet, including same-package cross references and AEC-Q100 automotive options for engineers evaluating wide-Vin buck converters.
LMR64010XMFX - 1A, 14V Step-Up DC-DC Converter | Texas Instruments
The Texas Instruments LMR64010XMFX is a SIMPLE SWITCHER® current-mode boost (step-up) DC-DC switching regulator that delivers up to 1A of switch current in a tiny 5-pin SOT-23 (SC-74A / SOT-753) package. Operating from a 2.7V to 14V input rail, it produces an adjustable output from 3V to 40V at a fixed 1.6 MHz switching frequency, making it one of the industry's smallest 40V-output boost converters. A boost (step-up) DC-DC converter is a type of switched-mode power supply (SMPS) that uses an inductor, a power switch, a diode, and an output capacitor to step a lower DC input voltage up to a higher DC output voltage. The boost topology belongs to the SMPS family, which itself falls under the broader category of power management ICs (PMICs). By using pulse-width modulation (PWM) and energy storage in a magnetic field, a boost converter achieves far higher efficiency (>80% typical) than a linear regulator when VIN is significantly below VOUT, eliminating the need for bulky heatsinking. Key features of the LMR64010 include 1.6 MHz fixed-frequency PWM operation (allowing the use of small chip inductors and ceramic capacitors), a 40V internal DMOS switch rated for 1A peak, less than 1 µA shutdown quiescent current for battery-saving standby, and cycle-by-cycle current limiting. Internal compensation simplifies the external BOM to just an inductor, a Schottky diode, input/output capacitors, and two feedback resistors, all of which fit into roughly 25 mm² of PCB area. The LMR64010 employs current-mode control with a 1.6 MHz oscillator and an integrated 40V DMOS power switch. The high switching frequency pushes the converter's fundamental ripple and its harmonics above the AM broadcast band, simplifying EMI filtering and enabling compliance with FCC and CISPR radiated and conducted limits. Current-mode control also provides inherent cycle-by-cycle current limiting and simplified loop compensation. Typical applications include bias supplies for TFT LCD panels (10V to 20V rails from 3.3V/5V system rails), LED drivers for indicator and signage lighting, low-power 12V to 36V industrial sensors, battery-powered portable equipment stepping 1S Li-ion up to USB-OTG or 5V/12V rails, and white-LED flash and backlight circuits in handheld instruments. When designing with the LMR64010XMFX, ensure the chosen inductor has a saturation current rating at least 30% above the 1A internal switch limit to avoid saturation at cold temperatures, and select a Schottky rectifier with reverse voltage above 40V and average forward current above 1A. Keep the feedback trace short and away from the SW node to avoid noise injection that destabilizes the regulation loop. This page synthesizes distributor pricing, drop-in SOT-23 alternatives, and practical inductor/diode design notes that go beyond the manufacturer datasheet, giving engineers a single-source engineering reference.
LMR64010XMFX/NOPB - 40V 1A Boost Converter SOT-23 | TI
The Texas Instruments LMR64010XMFX/NOPB is a current-mode boost switching regulator from the SIMPLE SWITCHER family. It operates from a 2.7V to 14V input and generates an adjustable output from 3V to 40V using an internal 1A power switch, all within a compact 5-pin SOT-23 (DBV/SC-74A) package. A boost converter, also called a step-up regulator, is a type of DC-DC converter that produces an output voltage higher than its input. Within the power management hierarchy (boost converter -> DC-DC converter -> switching regulator -> power management IC -> semiconductor), it is a fundamental building block for generating higher voltage rails from battery or low-voltage bus inputs. Key features include a fixed 1.6 MHz switching frequency that allows very small external inductors and capacitors, an internal 40V-rated switch supporting outputs of 16V or greater, and current-mode control providing fast transient response and simple loop compensation. The minimal power loss of the internal switch enables SOT-23 packaging, delivering industry-leading power density without heatsinking. Technically, the current-mode architecture senses switch current cycle-by-cycle, simplifying compensation and enabling robust enable-based shutdown. Thermal shutdown and switch current-limit protection guard against fault conditions. The high 1.6 MHz operating frequency keeps switching ripple above sensitive audio and analog bands, easing output filtering. Typical applications include OLED display bias supplies, portable battery-powered devices, LCD bias and backlight rails, and general-purpose step-up regulation to 16V-40V rails for sensors, photodiode bias, and RF circuits. Pricing is referenced as of 2026-08-29. Design tip: keep the switch node, output diode, and output capacitor loops short to minimize EMI, use a Schottky diode rated above 40V, and select an inductor with saturation current above the 1A peak switch current.
LMR64010XMFX/NOPB-Q1 - 40V Boost Regulator 1.6MHz | TI
The Texas Instruments LMR64010XMFX/NOPB-Q1 is a SIMPLE SWITCHER high-voltage boost (step-up) switching regulator in a 5-pin SOT-23 (SC-74A/SOT-753) package. It operates from a 2.7V to 14V input and generates adjustable outputs up to 40V using an internal 1A power switch, switching at a fixed 1.6 MHz frequency. The -Q1 suffix denotes an AEC-Q100-qualified variant for automotive applications. A boost converter is a type of switching regulator (DC-DC converter) in the broader power management IC family that steps an input voltage up to a higher regulated output by storing energy in an inductor during the switch on-time and releasing it to the output during the off-time. Boost converters complement LDO linear regulators, which can only step down; the LMR64010 fills the step-up role with far higher efficiency than charge pumps. Key features include the 40V internal switch rating, enabling output rails of 16V or higher from low-voltage inputs; a 1.6 MHz fixed-frequency current-mode control topology that allows small inductors and ceramic capacitors, yielding high power density in the tiny SOT-23 footprint; and minimal internal switch power loss that eliminates the need for a heatsink. The adjustable feedback reference allows any output within range via an external resistor divider. Technically, current-mode control provides fast transient response and straightforward loop compensation, while the 1.6 MHz switching frequency keeps ripple components above sensitive analog bands. Internal cycle-by-cycle current limiting and thermal shutdown protect the device during faults. Typical applications include LCD/LED bias supplies for automotive displays, sensor and amplifier high-voltage rails, white LED backlight drivers, and general-purpose 5V-to-20V+ point loads where a discrete controller would be too complex. The low 2.7V startup floor suits single-cell Li-ion and 3.3V industrial buses. Design tip: keep the switch node, inductor, and output diode loop as short as possible; verify output diode reverse-voltage rating exceeds 40V, and check thermal rise because SOT-23 dissipation is limited.
LMS3655LQRNLRQ1 - 5.5A 36V Sync Step-Down Converter | TI
The Texas Instruments LMS3655LQRNLRQ1 is a 5.5 A synchronous buck (step-down) DC-DC converter with a 36 V maximum input rating, 400 kHz typical switching frequency, and a fixed 5 V output, supplied in a 22-pin PowerVQFN package. It is the AEC-Q100 automotive-qualified member of the LMS3655 family, optimized for high-performance point-of-load regulation in automotive and industrial systems. A buck converter (step-down switching regulator) is a switched-mode power supply topology that uses an inductor, a high-side switch, and a synchronous low-side switch to efficiently convert a higher DC input voltage to a lower DC output voltage. Buck regulators dominate point-of-load conversion because they deliver far higher efficiency than linear regulators when the input-to-output voltage differential is significant, and they belong to the broader DC-DC switching regulator family inside power management ICs. Key specifications include a 5.5 A continuous output current, 36 V maximum input, 400 kHz switching frequency, fixed 5 V output (with 3.3 V and adjustable 1 V to 20 V variants in the same family), and seamless PWM-to-PFM transition that holds efficiency high at light load. The integrated MOSFETs and 400 kHz frequency enable a compact LC filter, while advanced high-speed control loop provides superior transient response for digital loads such as SoCs and FPGAs. The LMS3655-Q1 uses TI's advanced high-speed control architecture with internal synchronous MOSFETs to minimize external component count and PCB area. The PWM/PFM auto-transition maintains efficiency across load current, and the low quiescent current extends standby time in always-on subsystems. The PowerVQFN-22 package provides low thermal resistance for continuous 5.5 A delivery. Typical applications include automotive infotainment and ADAS power rails, industrial 24 V bus point-of-load conversion, body electronics and lighting controllers, and battery-powered equipment needing high step-down efficiency. Its wide 3.5 V to 36 V input supports load-dump-tolerant automotive supplies as well as 24 V industrial rails. When designing, place input bulk capacitance close to VIN/PGND, minimize the high-di/dt loop area, and use a 2-layer PCB inner ground pour under the PowerVQFN thermal pad. Follow the LMS3655-Q1 datasheet layout example for the smallest EMI footprint. This page combines distributor pricing, drop-in same-package alternatives, and design notes not aggregated on the manufacturer product page.
LMZ14203EXTTZX/NOPB - 42V 3A Buck Power Module | Texas Instruments
The Texas Instruments LMZ14203EXTTZX/NOPB is a 3A SIMPLE SWITCHER non-isolated point-of-load buck DC-DC power module with a 6V to 42V input range, an adjustable 0.8V to 6V output, and up to 18W total output power, housed in a leaded surface-mount TO-PMOD-7 package measuring 10.16 x 13.77 mm with a 4.57 mm height. This EXT-variant module is engineered specifically for military and rugged applications. A DC-DC buck (step-down) converter module is a type of switching voltage regulator that converts a higher input voltage to a lower, regulated output voltage using high-frequency switching. Unlike discrete converter designs, the LMZ14203EXT integrates the power MOSFETs, inductor, controller, and compensation network into a single encapsulated power module, collapsing a complex switching regulator design into one surface-mount component within the broader power management IC hierarchy. Key differentiating features include the wide 42V maximum input voltage for transient-survivable 24V and 28V industrial, avionics, and defense rails; up to 90% conversion efficiency; low radiated emissions with high radiated immunity; and pin-to-pin compatibility with the wider LMZ1420x (2A LMZ14202EXT, 1A LMZ14201EXT), LMZ14203 standard, and LMZ1200x (20V) families, enabling scalable power designs. The EXT-grade module passes vibration testing per MIL-STD-883 Method 2007.2 Condition A and JESD22-B103B Condition 1, and operates from -55C to +125C - a key advantage over the standard commercial-grade LMZ14203, which is rated only to -40C. The encapsulated TO-PMOD construction also simplifies EMI compliance compared to hand-built discrete layouts. Typical applications include military and avionics point-of-load power, rugged industrial automation, railway and transportation systems, and defense communications equipment requiring wide-temperature, high-vibration reliability from 24V/28V buses. Design consideration: the 6V minimum input means the module is unsuited for 5V-only rails; use the LMZ1200x family (20V max, 4.5V minimum) for lower input systems. Validate thermal performance at high VIN-to-VOUT ratios, where conversion losses concentrate. This page synthesizes distributor availability, pin-to-pin family alternatives, and rugged-application design guidance not found in the manufacturer datasheet alone.
LMZ14203HTZ/NOPB - 3A 42V SIMPLE SWITCHER Power Module | TI
The Texas Instruments LMZ14203HTZ/NOPB is a SIMPLE SWITCHER 6V to 42V, 3A High Output Voltage Power Module that integrates a DC/DC buck converter, power MOSFETs, inductor, and passives into a single 7-pin TO-PMOD (NDW) surface-mount package. It delivers an adjustable output from 5V to 30V at up to 3A continuous load current with typical efficiency up to 92%, and operates across an industrial -40C to +125C junction temperature range. What is a SIMPLE SWITCHER Power Module? It is a category of complete step-down (buck) DC/DC converter modules that integrate the synchronous MOSFETs, the bootstrap diode, the power inductor, and the basic compensation network inside the IC package. Compared to a discrete buck converter that requires the designer to choose a FET, inductor, Schottky diode, and feedback loop compensation, a power module collapses all of those selections into one part, which shortens design time, reduces PCB area, and improves EMI repeatability. The LMZ14203HTZ/NOPB sits in TI's high-input-voltage, high-output-voltage SIMPLE SWITCHER family, which lives under the broader hierarchy of: non-isolated POL module -> DC/DC converter -> switching regulator -> power management IC -> semiconductor. Key features include 6V to 42V wide input range, 5V to 30V adjustable output, 3A continuous output current, integrated shielded inductor, internal MOSFETs with bootstrap diode, and internal soft-start. The module uses peak-current-mode control with internal loop compensation, eliminating the need for an external compensation network. Protection features include thermal shutdown, input under-voltage lockout, output over-voltage protection, and cycle-by-cycle current limit. The TO-PMOD (NDW) package provides low thermal resistance with a bottom-side thermal pad for PCB heatsinking. The architecture uses TI's proprietary WEBENCH-compatible SIMPLE SWITCHER topology. The internal synchronous MOSFETs eliminate the external Schottky diode required by earlier non-synchronous modules, increasing efficiency and reducing solution footprint. The integrated shielded inductor minimizes radiated EMI while maintaining a 10mm x 10mm total PCB footprint. Typical applications include industrial 24V rail point-of-load regulation, factory automation PLC I/O power, 12V/24V distributed bus stepping, telecom equipment intermediate rails, and test-and-measurement instrumentation. The wide 42V input tolerates transients on industrial 24V and 28V avionics buses. When designing with this module, the primary trade-off is solution size versus thermal performance: the integrated inductor caps switching frequency around 800 kHz, which is lower than discrete converters but eliminates the largest external component. Use the exposed thermal pad with at least 1 square inch of copper pour for 3A continuous load at VIN above 24V. This page synthesizes distributor pricing, drop-in alternatives, and practical thermal/design notes not found on the manufacturer product page alone.
LMZ22003TZ - 3A 20V Buck Power Module | Texas Instruments
Texas Instruments LMZ22003TZ is a non-isolated SIMPLE SWITCHER buck power module rated for up to 3 A output current, a 6 V to 20 V input range, and an adjustable 0.8 V to 6 V output in a seven-pin TO-PMOD package. It integrates a shielded inductor and achieves efficiency up to 92%, helping reduce heat in compact point-of-load power systems. A DC-DC buck converter reduces a higher DC input voltage to a lower regulated rail. This SIMPLE SWITCHER module integrates the switching power stage and shielded inductor into one thermally enhanced package, simplifying layout compared with a discrete buck design. It belongs to the broader DC-DC converter and power-management IC hierarchy for industrial, communications, and embedded systems. Key features include a maximum total output power of 18 W, low component count, low output-voltage ripple, and testing to EN55022 Class B. Only two external resistors and three external capacitors are required to complete the power solution. Frequency synchronization input and an external soft-start capacitor add flexibility for multi-rail systems and controlled startup sequencing. The module uses a synchronous buck architecture with integrated shielded inductor technology. Its 7-pin TO-PMOD package measures approximately 13.77 mm by 10.16 mm and is 4.57 mm high. The package supports hand or machine soldering, while its integrated inductor simplifies magnetic-component selection and PCB layout. Typical uses include 12 V-to-5 V and 12 V-to-3.3 V point-of-load conversion, communications equipment, industrial controllers, networking hardware, and embedded computing. The 20 V maximum input suits 12 V industrial and telecom rails, while the adjustable output supports multiple common logic voltages. For robust operation, verify input undervoltage, output-current margin, thermal rise, and layout requirements against the manufacturer datasheet. Respect the 20 V maximum input voltage and account for startup behavior when sequencing multiple rails. The external soft-start capacitor and enable control should be evaluated for the target system’s power-up requirements. This page consolidates verified Texas Instruments specifications, distributor availability data, and practical engineering guidance. It also identifies same-brand pin-compatible family options and clearly separates confirmed facts from parameters that still require design verification.
LMZ31530RLGT - 30A SIMPLE SWITCHER Power Module, 3-14.5V Input | TI
The Texas Instruments LMZ31530RLGT is a 30 A SIMPLE SWITCHER step-down power module that integrates a DC/DC converter, power MOSFETs, a shielded inductor, and passives into a single 15 x 16 x 5.8 mm QFN package. The module accepts a 3 V to 14.5 V input and produces an adjustable output from 0.6 V to 3.6 V with 1 percent reference accuracy, eliminating the loop-compensation and magnetics selection steps that complicate discrete buck designs. It requires as few as three external components, which dramatically shrinks BOM count and PCB area for high-current point-of-load rails. What is a power module? A power module (also called a POL module or integrated point-of-load converter) is a category of switching regulator in which the controller IC, MOSFET switches, inductor, and key support components are factory-assembled inside one package. The module sits inside the power management IC hierarchy alongside discrete buck converters, synchronous regulators, and LDO regulators. Compared to a discrete buck design, a module simplifies layout, reduces EMI risk, and shortens design cycle time by removing the magnetics design step. Key features include ultra-fast load-step response, selectable switching frequency between 300 kHz and 800 kHz, an optional split-power-rail topology, and over-current, over-temperature, and under-voltage protections. The exposed QFN pad supplies a low thermal-resistance path to the host PCB, supporting continuous 30 A output with proper copper-pour area. The combination of factory-tuned compensation and integrated magnetics is the principal reason designers choose the LMZ31530RLGT over a discrete buck when board space and time-to-market dominate the trade-off. From an architectural perspective, the module uses a peak-current-mode control loop, which feeds the inductor current into the modulator to provide line-feed-forward and cycle-by-cycle current limiting. The internal MOSFETs are rated for the 14.5 V maximum input, and the integrated shielded inductor minimizes radiated EMI by containing the AC flux inside the package boundary. Synchronization to a system clock is supported, allowing multiple modules to operate in phase-shifted mode to spread ripple frequency across the PCB. Typical applications include 30 A point-of-load rails for FPGA core and transceiver supplies, ASIC and DSP core voltages, server and telecom cards with intermediate bus architectures, and any board that needs a compact 0.6 V to 3.6 V rail from a 12 V input. Industrial automation controllers and test-and-measurement equipment use this module where small footprint and proven compensation outweigh the small premium over discrete solutions. When designing with this device, ensure the host PCB carries a substantial copper-pour area on the exposed thermal pad to keep junction temperature within ratings at full load. Decouple the input with low-ESR ceramic capacitors placed as close as possible to the VIN and PGND pads, and follow the layout guidance in the datasheet to avoid ground bounce. Output ripple is set by the external output capacitors - higher-quality ceramics yield lower ripple. This page synthesizes distributor pricing, drop-in alternatives, and PCB-layout design notes not found in the manufacturer datasheet, with cross-references to compatible parts in the TI SIMPLE SWITCHER and TPSM power-module families.
LMZ36002RVQR - 60V 2A QFN Step-Down Power Module | Texas Instruments
The Texas Instruments LMZ36002RVQR is a 4.5V to 60V input, 2A output synchronous step-down power module integrating the DC/DC converter, shielded inductor, and passives into a single 10 mm × 10 mm × 4.3 mm QFN package. It delivers an adjustable output from 2.5V to 7.5V and supports adjustable switching frequency from 200 kHz to 1 MHz, including external synchronization. The 43-pin B3QFN package simplifies PCB layout while keeping the design footprint small and low-profile. A power module is a complete integrated power solution that combines the switching controller, MOSFETs, inductor, and critical passives inside a single package, eliminating the most error-prone parts of discrete buck converter design. Power modules belong to the broader category of switching regulators (buck converters) within the DC/DC converter family, which itself sits in the power management IC hierarchy. Compared to discrete buck designs, modules reduce radiated EMI, shorten time-to-market, and free the engineer from inductor selection and feedback compensation. Key features include 4.5V to 60V wide input range suitable for 12V, 24V, and 48V industrial buses, 2A continuous output current, adjustable switching frequency, external synchronization, internal MOSFETs with current-mode control, integrated bootstrap, and built-in protection including thermal shutdown, input undervoltage lockout, and cycle-by-cycle current limit. The LMZ36002RVQR requires as few as three external components (input cap, output cap, feedback resistors) to deliver a working regulated supply. Internally the LMZ36002 uses peak current-mode control with internal compensation, a high-side P-channel / low-side N-channel MOSFET pair, and a coupled shielded inductor that minimizes radiated EMI. The exposed thermal pad on the QFN package provides a low thermal resistance path, allowing the module to deliver full 2A output across industrial temperature ranges without external heatsinking under most conditions. Typical applications include factory automation 24V point-of-load rails, industrial sensor and actuator power, building automation, battery-powered systems up to 60V, and PoL supplies for FPGA / DSP / MCU subsystems. The wide input range also suits telecom equipment operating from nominal 48V backplanes. When designing with this device, prioritize a 4-layer PCB with a continuous ground pour and stitch vias beneath the exposed thermal pad to keep the junction temperature within safe limits under full load. The RT/SS pin sets soft-start and switching frequency — refer to the manufacturer datasheet for resistor and capacitor selection tables before finalizing the BOM. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a faster path from selection to certified BOM.
LMZM33603RLRR - 3A 36V Step-Down DC/DC Power Module | Texas Instruments
The Texas Instruments LMZM33603RLRR is a fully integrated 3 A step-down DC/DC power module combining synchronous MOSFETs, a shielded inductor, and compensation/passives into a low-profile 9 mm × 7 mm × 4 mm 18-pin QFN package. It accepts an input voltage range of 4 V to 36 V and delivers an adjustable output from 1 V to 18 V at up to 3 A load current with peak efficiencies of 95%. The switching frequency is adjustable from 200 kHz to 1.2 MHz and synchronizable to an external clock, giving designers flexibility to balance efficiency, solution size, and EMI performance. A power module is a fully-encapsulated subsystem that integrates the active switches (MOSFETs or IGBTs), magnetic energy-storage elements (typically a shielded inductor), and the passive compensation network of a switching regulator into a single, characterized, factory-tuned package. As a member of the broader category of point-of-load (PoL) converters inside the DC/DC converter family, power modules sit within the power management IC hierarchy and effectively eliminate the loop-compensation, magnetics-selection, and EMI-filter design steps that a discrete buck regulator would otherwise require. Engineers specify them when deterministic performance, fast time-to-market, and a small PCB footprint matter more than absolute lowest BOM cost. Key features of the LMZM33603RLRR include a Power-Good output for sequencing, internal compensation, all I/O accessible from the perimeter for easy probing, pin compatibility with the 2 A LMZM33602, adjustable soft-start, and the ability to meet EN55011 Class B radiated EMI with a simple filter network. The wide 4 V to 36 V input range makes the device suitable for industrial 24 V buses, battery-powered, and distributed 12 V systems alike. Up to 18 V output at 3 A allows direct generation of system, FPGA, or industrial-rail voltages from a higher-voltage source without an intermediate regulator. The architecture uses a current-mode control topology with an internal MOSFET pair, an integrated shielded power inductor, and factory-tuned feedback compensation. The exposed top-side pad provides a low thermal resistance path, while the perimeter-only pinout simplifies PCB routing and enables a single-layer layout if desired. Compared with a discrete buck, the integrated magnetics reduce EMI hotspot area and remove the sensitivity to external inductor tolerance that often requires rework during design validation. Typical applications include industrial 24 V distributed bus POL converters, factory-automation PLC and sensor-supply rails, battery-powered 12 V/24 V input portable equipment, telecommunications equipment requiring high-efficiency dense power, test and measurement systems needing low-noise regulated rails, and FPGA/DSP core or I/O rail generation. The QFN package and 4 mm profile are particularly attractive for space-constrained boards. When designing with this device, pay close attention to input bulk-capacitor sizing (a minimum 22 µF X7R ceramic is recommended at the VIN pins) and to PCB layout beneath the module - the integrated inductor's magnetic field benefits from a small keep-out region and from stitching the inner-layer ground pour around the perimeter. The PG pin can be used for multi-rail sequencing, while the SS/TR pin sets soft-start time and supports tracking with another rail.
LP87702 - Dual Buck + 5V Boost PMIC | Texas Instruments
The Texas Instruments LP87702 is a high-efficiency power management IC (PMIC) integrating two step-down DC/DC converters (Buck0 and Buck1) and a 5-V boost converter, designed for safety-critical industrial radar applications. It is housed in a 32-pin VQFN (RHB, 5x5 mm) package and supports input voltages from 2.8V to 5.5V with programmable output voltages and remote voltage sensing to compensate for IR drops. A PMIC (Power Management Integrated Circuit) consolidates multiple power conversion and management functions into a single package. In the power-management hierarchy, the LP87702 is a multi-rail switching regulator (buck/boost DC-DC converter) within the broader category of power management ICs, reducing board space and simplifying power sequencing versus discrete solutions. Key features include two synchronous buck converters delivering up to 3A each, a 5V boost converter with up to 600mA output, and programmable start-up and shutdown sequences synchronized to the enable signal. Diagnostic functions - two voltage monitoring inputs for external rails, a window watchdog, current limiting, and thermal shutdown - are critical for functional-safety designs. Automatic PWM/PFM (AUTO mode) operation maintains high efficiency over a wide load range. The LP87702 uses fixed-frequency PWM control with internal compensation. The buck converters switch at 2.2MHz, enabling small external inductors and capacitors. Remote voltage sensing improves output accuracy by compensating PCB trace resistance, which matters for high-current radar loads. An I2C interface supports dynamic voltage scaling and status monitoring. Typical applications include industrial radar sensors, ADAS radar front ends, safety-critical embedded systems, and camera modules requiring 5V rails for analog front ends. Integrated diagnostics and the watchdog suit ASIL-oriented designs, while compact footprint suits space-constrained industrial sensors. When designing with the LP87702, connect remote-sense pins at the point of load and follow TI datasheet layout guidance: solid ground plane, input decoupling close to VIN, and careful switch-node routing to limit EMI.
LP87721-Q1 - Automotive 3A 3-Channel Low-Noise Buck PMIC | Texas Instruments
The LP87721-Q1 from Texas Instruments is an automotive-grade, three-channel low-noise buck converter power management IC (PMIC) delivering up to 3A per channel, optimized for radar applications. It is available in a 24-pin VQFN-HR (4x4) package and is qualified to AEC-Q100 (Q1) standards. A PMIC, or Power Management IC, is a semiconductor device that integrates multiple voltage regulator channels, control logic, and sequencing functions into a single chip. It sits within the broader power management IC hierarchy, which is a subset of integrated circuits used to convert, regulate, and distribute power across a system. PMICs are essential for managing the multiple power rails required by processors, sensors, RF transceivers, and other analog and digital components. Key features of the LP87721-Q1 include three independent buck converter channels, each capable of sourcing 3A, a low-noise design for sensitive radar signal chains, and automotive qualification. The integrated MOSFETs and control circuitry reduce external component count, simplifying board design. The device supports a wide input voltage range, although specific values require verification from the datasheet. The compact VQFN-HR package enables space-constrained designs typical of in-vehicle radar modules. Architecturally, the LP87721-Q1 uses synchronous buck topology to achieve high efficiency, and the low-noise output is critical for maintaining radar signal integrity. The PMIC includes features for power sequencing, allowing controlled start-up of multiple rails. Detailed specifications such as switching frequency, output voltage accuracy, and quiescent current are documented in the TI datasheet (https://www.ti.com/product/LP87721-Q1). Typical applications include automotive radar front ends, advanced driver assistance systems (ADAS), driver monitoring systems, and industrial radar. The device is particularly suited for powering radar processors and sensors, where multiple clean 3A rails are required. Its AEC-Q100 qualification ensures reliable operation under harsh automotive conditions. When designing with the LP87721-Q1, pay attention to input and output capacitor selection to maintain stability and reduce noise. Ensure adequate PCB copper area for thermal dissipation, as the buck converters can dissipate significant power at high load. The sequencing feature should be utilized to maintain proper power-up order. For precise design guidance, refer to the TI application notes and reference designs.
LT1076CQ - 2A Step-Down Switching Regulator | Analog Devices
The LT1076CQ is a monolithic bipolar step-down switching regulator from Analog Devices (formerly Linear Technology) that delivers up to 2A of switch current in a TO-263-6 (D2PAK) package. It operates as a buck, boost, or flyback converter with positive or negative output polarity, and features an adjustable output voltage starting from 2.5V. The device integrates the power switch, oscillator, control circuitry, and current limit components on a single chip, requiring only a few external parts for normal operation. A switching regulator is a voltage regulator that uses a switching element (transistor) to convert an input voltage to a desired output voltage with high efficiency, typically above 80%. Unlike linear regulators, switching regulators store energy in inductors and capacitors and switch the element on and off at a high frequency (100kHz for the LT1076) to control the output. This makes them ideal for applications where power dissipation and heat are concerns, such as battery-powered devices and industrial power supplies. Key features of the LT1076CQ include a 100kHz switching frequency, 8.5mA quiescent current, programmable current limit, and the ability to operate with input voltages up to 60V. The device also includes micropower shutdown for power saving. The TO-263-6 package provides excellent thermal performance with a low thermal resistance, enabling high power dissipation without external heatsinks in many applications. The LT1076CQ uses a classic positive buck topology but includes design innovations that allow it to be used as a positive-to-negative converter (flyback) and in boost configurations. The internal current limit is set at 2.6A (for the LT1076), and the oscillator frequency is preset at 100kHz, which balances efficiency and component size. The device is designed for rugged industrial environments, with a junction temperature range of -40°C to +125°C. Typical applications include industrial power supplies, battery chargers, distributed power systems, and automotive electronics. Its wide input voltage range and high efficiency make it suitable for systems that require step-down conversion from 24V or 48V buses. The LT1076CQ is also used in negative output applications, such as generating -5V from a positive input. When designing with the LT1076CQ, ensure proper input and output capacitor selection and inductor sizing to maintain stability and low ripple. The programmable current limit allows designers to set the maximum switch current to protect the circuit. The device is available in lead-free (PBF) and tape-and-reel (TR) options, and is RoHS compliant.
LT1076CQ#PBF - 2A Buck/Boost/Flyback Regulator | Analog Devices
The LT1076CQ#PBF is a monolithic bipolar switching regulator from Analog Devices (formerly Linear Technology) that delivers up to 2A of switch current in a TO-263-6 (D2PAK) package. It supports buck, boost, flyback, and inverting topologies with an adjustable output voltage from 2.5V to 50V. The device integrates the power switch, oscillator, control circuitry, and current limit components, requiring only a few external parts for operation. With a 100kHz switching frequency and current-mode PWM control, it offers excellent dynamic response and stability. A switching regulator is a voltage regulator that uses an inductor, switch, and diode to efficiently convert an input voltage to a desired output voltage. Unlike linear regulators, switching regulators achieve high efficiency by storing energy in the inductor and switching the power transistor on and off. The LT1076CQ#PBF belongs to the family of DC-DC converters, which are essential in power management systems for converting voltages in battery-powered devices, industrial equipment, and automotive electronics. Key features of the LT1076CQ#PBF include a 2A switch current rating, wide input voltage range up to 60V, and the ability to operate in multiple topologies. The current-mode control architecture provides inherent cycle-by-cycle current limiting and simplifies loop compensation. The device also features thermal shutdown and a low quiescent current, making it suitable for power-sensitive applications. The LT1076CQ#PBF uses a bipolar process technology, which provides robust performance and high reliability. The 100kHz switching frequency balances efficiency and component size, allowing for compact inductor and capacitor selections. The device's adjustable output voltage range of 2.5V to 50V provides flexibility for various output requirements. Typical applications include industrial power supplies, battery chargers, distributed power systems, and automotive electronics. The device's ability to step up, step down, or invert voltage makes it a versatile choice for many power conversion needs. When designing with the LT1076CQ#PBF, ensure proper PCB layout with short, low-inductance paths for the switch node and ground. Use appropriate input and output capacitors to minimize ripple and ensure stability. The thermal pad of the D2PAK package should be connected to a large copper area for heat dissipation.
LT1076CQ#TRPBF - 2A Buck/Boost/Flyback Regulator | Analog Devices
The LT1076CQ#TRPBF is a monolithic bipolar switching regulator from Analog Devices, rated for 2A switch current and designed for buck, boost, and flyback topologies. It operates from input voltages up to 45V and provides an adjustable output from 2.5V to 50V. The device integrates the power switch, oscillator, control circuitry, and current limit components on a single chip, requiring only a few external parts for normal operation. Housed in a TO-263-6 (D2PAK) package with 5 leads plus tab, it is suitable for surface-mount designs. A switching regulator is a voltage regulator that uses a series element that switches between on and off states to maintain a constant output voltage. Unlike linear regulators, switching regulators achieve high efficiency by storing energy in inductors and capacitors, making them ideal for applications where power dissipation and battery life are critical. The LT1076 belongs to the family of monolithic switching regulators, which integrate the control circuitry and power switch into a single IC, simplifying design and reducing component count. Key features of the LT1076CQ#TRPBF include a 2A switch current rating, a wide input voltage range of 7.3V to 45V, and an adjustable output voltage from 2.5V to 50V. The device operates at a switching frequency of 100kHz, balancing efficiency and component size. It also includes an output monitor and current limit protection, enhancing reliability in demanding applications. The TO-263 package provides excellent thermal performance, with a low thermal resistance that supports continuous operation at high load currents. Technically, the LT1076 uses a classic positive buck topology but includes design innovations that allow it to be configured as a positive-to-negative converter or a flyback converter. The internal oscillator and control circuitry are designed for stable operation across a wide range of input and output conditions. The device's bipolar process technology ensures robust performance and long-term reliability, making it a trusted choice for industrial and automotive power supplies. Typical applications include distributed power systems, battery chargers, and point-of-load converters. The LT1076 is particularly well-suited for industrial control systems, telecom equipment, and automotive electronics where a rugged, high-efficiency switching regulator is required. Its ability to handle both step-down and step-up configurations adds versatility to power supply designs. When designing with the LT1076CQ#TRPBF, ensure proper input and output capacitor selection to minimize ripple and maintain stability. The inductor value should be chosen based on the desired ripple current and switching frequency. Adequate PCB copper area is essential for thermal management, especially at high output currents.
LT1374CR - 4.5A 500kHz Buck Switch Reg | Analog Devices
The Analog Devices LT1374CR is a 500 kHz monolithic buck-mode switching regulator that integrates a 4.5 A internal power switch together with the oscillator, control logic and protection circuitry on a single die. Housed in a 7-lead TO-263 (DDPAK) package with thermal tab, it accepts a 5 V to 25 V input range and delivers an adjustable output from 2.42 V to 21.5 V, making it a true drop-in successor to the classic Linear Technology LT1074/LT1076 family of high-current step-down regulators. A buck (step-down) switching regulator is a switched-mode DC-DC converter that uses an inductor, a power switch, and a rectifier to transfer energy from a higher input rail to a lower output rail at high efficiency. The LT1374CR belongs to the broader hierarchy of voltage regulators -> DC-DC converters -> switching regulators -> power management ICs. The 500 kHz constant switching frequency permits a small 1.8 µH saturating inductor and all-ceramic input/output capacitors, simplifying the bill of materials and shrinking the solution footprint compared to 100-200 kHz predecessors. Key features include a 0.07 ohm saturating internal NPN switch for low dropout loss, 2.5 mA quiescent supply current, 20 µA shutdown current, current-mode topology for fast transient response and good loop stability, and full cycle-by-cycle short-circuit protection. The device is offered in both fixed 5 V output (LT1374CR-5) and adjustable (LT1374CR) versions, with optional shutdown/synchronization via the LT1374CR-SYNC variant. The exposed thermal tab provides a low theta-JA path to dissipate up to several watts at full 4.5 A load. The current-mode architecture samples inductor current each cycle and feeds it into a PWM comparator against the error amplifier output, giving inherent line-rejection and a single-pole compensation network. Synchronization to an external 600 kHz clock is supported on SYNC parts, allowing multiple regulators to phase-lock and reduce input RMS ripple. Thermal shutdown and cycle-by-cycle current limiting protect against output shorts and overload conditions, while the wide 5 V to 25 V VIN range covers 12 V and 24 V industrial bus rails without a preregulator. Typical applications include 5 V to 12 V distributed power systems, industrial 24 V bus converters, automotive accessory power (with appropriate transient protection), battery chargers, and distributed point-of-load regulation for FPGAs, DSPs, and microcontrollers. A high-current variant such as the LT1374CR is especially valuable where a discrete switching controller plus external MOSFET would otherwise occupy too much PCB area. When laying out the LT1374CR, keep the input ceramic bypass capacitor within 5 mm of the VIN pin, use a low-ESR inductor rated for 5 A saturation, and connect the exposed tab to a 1 square-inch copper pour for thermal relief. Watch the maximum VIN rating of 25 V and provide a TVS or fuse for inductive load transients on industrial rails. SYNC and fixed-5-variants share the same 7-pin DDPAK footprint for PCB reuse. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement engineers and designers a single source for LT1374CR decisions.
LT1680CN - 60V Boost DC/DC Controller, 16-PDIP | Analog Devices
The Analog Devices LT1680CN is a high-power, current-mode switching power supply controller optimized for boost (step-up) topologies, housed in a 16-pin PDIP through-hole package. It drives an external N-channel MOSFET switch, supports input voltages from 4V to 60V, and switches at a maximum frequency of 200 kHz with a 90% maximum duty cycle. The high-current gate driver can handle up to 10,000 pF of MOSFET gate capacitance, enabling very high power DC/DC converter designs. A switching controller IC (often called a PWM controller or DC-DC controller) is the brain of an external-MOSFET switched-mode power supply. Unlike a fully integrated switching regulator that contains the power switch on-die, a controller relies on an external MOSFET (or GaN/IGBT) to handle the actual current. This split lets the designer pick the switch technology for a target current/voltage, while the controller IC provides the regulation loop, gate drive, current sensing, and protection. The LT1680 sits in the linear regulator / voltage regulator / power management IC hierarchy under Analog Devices' Power Management portfolio. The LT1680CN's headline features are: 60V input operation, fixed-frequency current-mode control, 10,000 pF gate-drive capability, programmable average current limiting, and a 5V reference output capable of sourcing 10 mA externally. Current-sense common-mode range extends to 60V, so the part can directly sense current in a high-side N-MOSFET boost converter without level-shifting tricks. These specs make it one of the few controller ICs in this package class that can drive high-voltage, high-current boost stages directly. Architecturally, the LT1680 uses a current-mode PWM core with a high-side or low-side current sense, a 5V internal reference, an internal oscillator, and a high-current gate driver. The current-mode control provides inherent cycle-by-cycle current limiting and simplifies feedback compensation by treating the inductor as a current source. The high-voltage input tolerance is achieved with a robust high-V process and on-chip ESD structures rated for the full 60V input. Typical applications include automotive 12V-to-24V/48V boost converters, telecom -48V distribution, industrial 24V step-up supplies, and high-power battery charging. The wide 4V-60V input range makes it compatible with nominal 12V, 24V, 36V, and 48V buses after transient headroom. The 5V/10mA reference can bias housekeeping circuits in the same converter. When designing with this part, keep the gate-drive loop short: the LT1680 can charge 10,000 pF quickly, and any trace inductance between the GATE pin and the MOSFET gate will ring. Use a local gate resistor (10-47 ohm) to damp the loop, and place input ceramic bypass as close to the VIN pin as possible. Estimated: at 200 kHz with 10 nF effective gate capacitance, gate-drive losses alone can reach ~20 mW per MOSFET, so thermal management of the MOSFET (not the controller) is usually the design-limiting factor. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB/thermal design notes not collated in the manufacturer datasheet alone.
LT1931AIS5#TRPBF - 2.2MHz Inverting 1A DC/DC Converter | ADI
The Analog Devices LT1931AIS5#TRPBF is a 2.2 MHz current-mode inverting DC/DC converter in a ThinSOT-23-5 (TSOT-23-5) package with integrated 1 A switch, designed to generate negative output voltages from a positive input rail. It delivers up to -34 V output at 1 A switch current from a 2.45 V to 16 V input range, with very low output ripple of 1 mV P-P at -5 V / 150 mA from a 5 V input. A DC/DC switching regulator (also called a switch-mode converter or SMPS) is an electronic circuit that uses energy storage elements (inductors, capacitors) and high-frequency switching to convert one DC voltage to another with high efficiency (typically 85-95%) versus a linear regulator. The inverting topology (often implemented as a Cuk or buck-boost variant) flips the polarity of the input voltage - so a +5 V input becomes -5 V at the output - using a single inductor and coupling capacitor. Inverting converters sit in the power management IC hierarchy alongside buck, boost, and SEPIC converters, all feeding downstream analog and mixed-signal systems. Key features include 2.2 MHz fixed-frequency operation (A suffix), 1 A integrated power switch, wide 2.45 V to 16 V input range, low output ripple, and the ability to use tiny surface-mount components 2 mm or less in height. The ThinSOT-23-5 footprint enables compact designs while the 2.2 MHz switching frequency keeps the converter above the AM broadcast band and outside common 455 kHz IF stages, simplifying EMI filtering. Technically, the LT1931A uses constant-frequency current-mode control for clean loop compensation and fast transient behavior. The high-side 1 A switch supports high peak inductor currents needed to deliver hundreds of mA at voltages from -5 V down to -34 V. Compared to charge-pump negative regulators, the LT1931A delivers much higher output current and supports higher power levels without the source-current spikes that couple back into the input rail. Typical applications include negative bias supplies for op-amps and LCD panels, portable instrumentation, GaN and SiC gate-driver negative rails, automotive sensor interfaces, and industrial analog front-ends. The wide input range also makes it suitable for 12 V bus systems and battery-powered equipment where a small, hot-rail-tolerant negative rail is required. When designing with the LT1931A, select a Schottky catch diode with low reverse leakage and adequate voltage margin (30 V or more for high-Vout designs), and use ceramic input/output capacitors rated for the peak currents seen in Cuk topology. The exposed backside thermal pad of the ThinSOT helps dissipate the 1 A switch losses, but the small footprint limits continuous output to a few hundred mA without airflow. This page consolidates distributor pricing (DigiKey, Mouser, LCSC), verified same-family drop-in alternatives (LT1931AIS5#TRMPBF, LT1931AES5#TRPBF), and practical design notes not found in the standalone datasheet.
LT1933HDCB - 600mA, 36V Buck Regulator | Analog Devices
The Analog Devices LT1933HDCB is a 600 mA, 500 kHz constant-frequency current-mode PWM step-down DC/DC converter with an internal 750 mA power switch, packaged in a 6-lead DFN (2 mm x 3 mm) with an exposed thermal pad. It accepts a wide 3.6 V to 36 V input range, delivers an adjustable output as low as 1.245 V, and runs at a fixed 500 kHz switching frequency that allows small inductor and ceramic-capacitor designs. According to the ADI datasheet, the part uses current-mode control for excellent line and load transient response and includes internal frequency compensation that simplifies loop design. A buck converter (step-down switching regulator) is a type of DC-DC converter that uses an internal power switch, an inductor, and a rectifying element to convert a higher DC input voltage to a lower DC output voltage at high efficiency. Buck regulators sit within the broader hierarchy of switched-mode power supplies (SMPS) and power management ICs, and they are preferred over linear regulators whenever the input-to-output voltage differential or load current would otherwise waste significant power as heat. The LT1933 family targets space-constrained applications that still require wide input range and high efficiency. Key features of the LT1933HDCB include a 36 V maximum input voltage, 600 mA continuous output current capability, 500 kHz fixed switching frequency, internal 750 mA power switch, internal current sensing, and a low shutdown current of less than 2 uA. The exposed-pad DFN package provides low thermal resistance so the device can deliver full output current across the -40 C to +125 C operating junction temperature range without an external heatsink in typical conditions. The device uses a constant-frequency current-mode architecture with slope compensation, an internal soft-start to limit inrush current, and an exposed thermal pad that acts as the electrical ground. Efficiency typically reaches 80-90 percent at moderate loads, and the high switching frequency allows the use of small ceramic input and output capacitors. The combination of wide VIN range and high switching frequency makes it well suited to battery-powered, industrial, and automotive-supplied loads. Typical applications include 12 V and 24 V industrial bus power conversion, distributed 5 V and 3.3 V rails for sensors and microcontrollers, battery-powered portable equipment, automotive infotainment and accessory power, and point-of-load regulation after a front-end switching converter. The wide VIN tolerance lets the same design survive cold-crank and load-dump transients on automotive supplies. When designing with the LT1933HDCB, follow the datasheet's recommended inductor and capacitor values to ensure stability and acceptable output ripple. Place the input capacitor as close as possible to the VIN and GND pins to minimize switching noise, and use sufficient copper area or thermal vias under the exposed pad to keep the junction temperature within the derating curve. This page synthesizes distributor pricing, drop-in alternative candidates from the same Analog Devices family, and practical design considerations not found in the manufacturer datasheet alone.
LT1933IDCB - 600mA 500kHz Step-Down Regulator | Analog Devices
The Analog Devices LT1933IDCB is a 600 mA, 500 kHz step-down switching regulator with a 3.6 V to 36 V input range, adjustable positive output referenced to 1.245 V, and a 6-lead WFDFN exposed-pad package. It is designed for compact power conversion where low profile, wide input range, and efficient current-mode PWM regulation are important. A step-down DC/DC converter, also called a buck converter, reduces a higher input voltage to a regulated lower voltage using an internal switching element, inductor, capacitor, and control loop. The LT1933 belongs to the switching-regulator family within the broader DC/DC converter and power-management semiconductor hierarchy. Its current-mode PWM architecture provides a practical solution for generating local rails from automotive, industrial, or distributed power systems. The LT1933 uses an internal 0.75 A power switch and is specified for a 600 mA output configuration. Its 500 kHz switching frequency supports a compact implementation with external passive components. The 6-lead DFN package reduces board area, while the exposed pad provides a thermal connection when copper area and heat dissipation are adequate. The adjustable output allows the design to select the required feedback divider rather than using a fixed-voltage version. The verified distributor data identifies the part as a positive adjustable buck regulator with a 1.245 V reference and a 600 mA output rating. The manufacturer search result describes the LT1933 family as a current-mode PWM step-down converter with an internal 0.75 A switch and a wide 3.6 V to 36 V input range. Additional electrical values, including efficiency curves, switching specifications, current-limit behavior, thermal resistance, and inductor recommendations, should be confirmed in the manufacturer datasheet before production release. Typical applications include point-of-load regulation, industrial control systems, automotive electronics, battery-powered equipment, and portable electronics. In these systems, the converter can create a lower, stable rail for sensors, communications circuitry, analog sections, or embedded controllers. Because a switching regulator introduces ripple and switching-node energy, layout and component selection are as important as the nominal voltage and current ratings. Use the exposed pad as a thermal and electrical connection according to the package land pattern, and keep the switching node compact and away from sensitive signal paths. Verify the maximum input voltage, duty-cycle limits, output-voltage accuracy, current-limit behavior, and capacitor ratings in the official datasheet. This page combines distributor data, manufacturer information, and practical design guidance for engineers evaluating a compact 600 mA buck regulator.