Power Management
Subcategories
Products (2,800+)
LMR14050SDDA - 40V 5A 2.2MHz Buck Converter | Texas Instruments
The Texas Instruments LMR14050SDDA is a SIMPLE SWITCHER 40 V, 5 A, 2.2 MHz step-down (buck) DC-DC converter with an integrated high-side MOSFET, housed in an 8-pin HSOIC (DDA / SO-PowerPAD-8) package. It accepts a wide 4 V to 40 V input and delivers an adjustable output from 0.8 V to 28 V at up to 5 A. A step-down converter (buck regulator) is a switching voltage regulator that converts a higher input voltage to a lower output voltage using a switching element, inductor, and capacitors. Buck regulators sit within the power management IC hierarchy and offer far higher efficiency than linear regulators, making them the default choice for wide-input industrial and automotive power conditioning. Key features include the 40 uA quiescent sleep-mode current and 1 uA shutdown current for battery-powered designs, an adjustable switching frequency up to 2.2 MHz (RT/SYNC pin) allowing operation above the AM band, internal loop compensation that minimizes external component count, and pulse-skipping eco-mode at light loads for high efficiency across the load range. Technically, the LMR14050 integrates a high-side MOSFET rated for the full 40 V input transient environment, with cycle-by-cycle current limiting, thermal shutdown, and a power-good output flag for rail supervision. The constant-on-time control topology delivers fast transient response and eases compensation across a wide range of output capacitance values. Typical applications include 12 V and 24 V industrial bus power conditioning, automotive battery-front-end pre-regulators feeding downstream point-of-load converters, and battery-powered instrumentation where 40 uA standby current preserves battery life. Design consideration: at 2.2 MHz switching frequency, inductor and capacitor values shrink, but the input voltage ripple and switching losses rise; choose the RT resistor per the datasheet equations and verify thermal performance on the PowerPAD copper pour. This page synthesizes verified distributor data, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LMR23630FQDRRRQ1 - 36V 3A Sync Step-Down Converter | TI
The Texas Instruments LMR23630FQDRRRQ1 is an AEC-Q100 qualified SIMPLE SWITCHER synchronous step-down (buck) DC-DC converter that delivers up to 3 A of continuous output current from a wide 4 V to 36 V input range, housed in a 12-pin WSON (DRR) exposed-pad package. Key headline parameters include an adjustable output from 1 V to 28 V, switching frequency range of 200 kHz to 2.2 MHz (factory-set 400 kHz in the F variant), and automotive-grade qualification per AEC-Q100. The device integrates both high-side and low-side MOSFETs, eliminating external Schottky diode requirements and shrinking total solution footprint. What is a synchronous buck converter? A buck converter is a switched-mode power supply (SMPS) topology that steps a higher DC input voltage down to a lower regulated DC output by alternately switching an inductor between the input and ground. The 'synchronous' designation means the rectifier diode has been replaced with a second MOSFET to improve efficiency at high output currents. Within the broader power-management hierarchy, a buck converter sits below linear regulators (LDOs) for high-step-down / high-current applications because it dissipates far less power, but introduces switching ripple that must be filtered. The LMR23630-Q1 belongs to TI's SIMPLE SWITCHER family aimed at minimizing external component count. Key features include 75 uA quiescent current (light load), peak-current-mode control for cycle-by-cycle current limit and simple loop compensation, precision enable pin with hysteresis for power sequencing, internal soft-start to limit inrush current, and thermal shutdown. The 12-pin WSON package exposes the die to a thermal pad with theta_JA of approximately 41 C/W on a standard JEDEC 4-layer board, supporting 3 A continuous output up to +125 C junction. Architecture depth: the LMR23630-Q1 uses peak current mode control with internal slope compensation, an 80 mV typical current-sense threshold, and a 7 MHz capable error amplifier. The wide 200 kHz to 2.2 MHz RT-programmable switching range lets the designer trade efficiency against passive component size. Internally the high-side FET has 95 mΩ and low-side 70 mΩ typical RDS(on) at 12 V, achieving peak efficiencies above 90 % at 24 V to 5 V/3 A. When designing with the LMR23630-Q1, choose the inductor so that its ripple current is between 20 % and 40 % of the 3 A output, place the input ceramic bypass within 5 mm of the PVIN pin, and follow the layout recommendations in the manufacturer datasheet. A feedback resistor divider using 1 % parts sets VOUT; the F-variant fixed 400 kHz switching minimizes BOM for noise-sensitive automotive rails. This page synthesizes distributor pricing, drop-in automotive alternatives from the LMR23610/15/25-Q1 family, and practical layout notes not found in the manufacturer datasheet alone.
LMR33630BDDAR - 3A, 36V Sync Step-Down Converter | Texas Instruments
The Texas Instruments LMR33630BDDAR is a SIMPLE SWITCHER synchronous buck DC/DC converter that delivers up to 3 A of output current from an input of 3.8 V to 36 V, housed in an 8-pin SO PowerPAD (DDA) package with an exposed thermal pad. The device is offered with a 1.4 MHz (BDD) switching frequency variant and provides an adjustable output voltage as low as 1 V using an external feedback divider. A buck (step-down) switching regulator is a type of DC-DC converter that uses an internal MOSFET switch, an external inductor, and a capacitor network to efficiently reduce a higher DC input voltage to a lower regulated output voltage. The buck regulator sits in the broader hierarchy of DC-DC converters -> switching regulators -> power management ICs -> semiconductors, and is the dominant topology for point-of-load conversion on industrial, automotive, and consumer boards because it offers 90%+ efficiency across a wide load range. Key features of the LMR33630BDDAR include 3 A continuous output current from a 36 V maximum input, a 1.4 MHz fixed switching frequency that supports small passive components, integrated synchronous MOSFETs (eliminating the external Schottky diode), a power-good output flag for rail sequencing, and internal compensation that removes the need for an external compensation network. The device also offers internal soft-start, cycle-by-cycle current limit, and thermal shutdown. Architecturally, the LMR33630 uses TI's peak current-mode control with an internal 1.4 MHz oscillator, internal high-side and low-side MOSFETs (synchronous rectification), and a precision reference for ±1% output accuracy. The high switching frequency keeps the output LC filter small, enabling a complete 3 A solution under 50 mm², while the wide 36 V input tolerance accommodates 12 V and 24 V industrial buses with transient margin. Typical applications include industrial PLC I/O and sensor rails, factory automation 24 V bus conversion, building automation, battery-powered portable equipment, and automotive infotainment/cold-crank tolerant rails. The wide VIN range makes it ideal for systems that must survive load-dump and jump-start transients on 12 V automotive rails. When designing with this part, ensure the PowerPAD thermal land is soldered to a sufficient copper pour (at least 100 mm²) to keep junction temperature within limits at 3 A continuous load, and follow the datasheet layout for input capacitor placement to minimize switching-node ringing.
LMR33630CDDAR - 3A Synchronous Buck Converter, 36V | TI
The Texas Instruments LMR33630CDDAR is a SIMPLE SWITCHER synchronous step-down DC/DC converter that delivers up to 3 A of load current from a 3.8 V to 36 V input rail, housed in an 8-pin HSOIC EP (DDA) PowerPAD package. It operates at a 2.1 MHz switching frequency (DDA grade) and provides a power-good flag plus internal compensation for a minimal external BOM. What is a synchronous buck converter? A buck converter (step-down switching regulator) is a switched-mode power supply topology that steps a higher DC input voltage down to a lower DC output voltage. A synchronous buck replaces the rectifier diode with a low-side MOSFET to reduce conduction losses, achieving >90% efficiency. The LMR33630 belongs to the SIMPLE SWITCHER family -> switching regulator -> DC/DC converter -> power management IC -> semiconductor, optimized for rugged industrial environments. Key features include a wide 3.8 V to 36 V operating input range, an adjustable output from 1 V to 24 V (per the Xecor comparison data), 24 uA quiescent current, internal compensation that eliminates external loop components, and a power-good flag output for sequencing. The 2.1 MHz switching frequency enables a small inductor and ceramic output capacitors, shrinking total solution size. Ultra-low EMI design reduces input filter complexity. The LMR33630 uses peak-current-mode control with an internal compensation network, allowing closed-loop stability with ceramic output capacitors without ESR compensation. Its 30 ns minimum on-time supports large step-down ratios, while the 8-pin HSOIC EP package with an exposed thermal pad keeps junction temperature low at full 3 A load even at elevated ambient. Typical applications include industrial 24 V rails, factory automation sensors, battery-powered portable equipment, point-of-load regulation from 12 V/24 V buses, and low-noise analog supply post-regulation. When designing, place the input ceramic capacitor directly across PVIN and PGND within 2 mm of the package, use a low-DCR shielded inductor, and follow TI's recommended 4-layer PCB layout to meet EMI margins. This page consolidates distributor pricing, drop-in alternatives, and engineering design notes synthesized from the LMR33630 datasheet, complementing the manufacturer datasheet with selection and cross-reference guidance.
LMR33640ADDAR - 4A 36V Synchronous Buck Converter | Texas Instruments
The Texas Instruments LMR33640ADDAR is a 4 A synchronous step-down DC/DC converter with a 3.8 V to 36 V input range and 1 V to 24 V adjustable output, housed in an 8-pin PowerSOIC (DDA) package with 400 kHz switching frequency. The device features functional-safety-capable design, precision enable, power-good flag, and pin-to-pin compatibility with the LMR33630 (3 A), LMR33620 (2 A), and LMR33610 (1 A) variants for scalable SIMPLE SWITCHER power designs. A step-down (buck) DC/DC converter is a switched-mode voltage regulator that steps a higher DC input to a lower DC output by rapidly switching an inductor between input and ground. The LMR33640ADDAR belongs to the synchronous buck family (FETs integrated inside the IC), within the broader hierarchy of switching regulators, then power management ICs, then power management semiconductors. Peak-current-mode control, internal MOSFETs, and wide Vin eliminate the need for an external power stage, making it a fully integrated point-of-load (POL) solution. Key specifications include 4 A continuous output current, 76 uA quiescent current at no load, 25 uA Iq in light-load mode, 1% feedback reference accuracy, and internal compensation that removes the loop compensation network. The peak-current-mode topology delivers fast transient response and simple Type-II loop compensation, while the 8-pin PowerSOIC package offers a thermal resistance around 50 C/W with thermal pad, suitable for -40 C to +125 C junction operation. Typical applications include industrial 24 V bus POL rails, factory automation sensor supplies, building automation 12 V/24 V distributed buses, battery-powered test equipment, eMMC/SSD storage power, and aftermarket automotive accessories. Wide Vin tolerance also supports USB-PD and other 5 V to 20 V inrush environments with downstream post-regulation. When designing with this part, choose inductor and Cout per the datasheet's WEBENCH tool to ensure stability. Place the input ceramic bypass capacitor within 2 mm of the VIN and PGND pins, and route the AGND island as a star point. The PowerSOIC exposed pad MUST be soldered to a copper pour sized to absorb typical 1.5 W to 3 W dissipation. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB design notes not aggregated in the manufacturer datasheet.
LMR36015FBRNXT - 60V, 1.5A Sync Step-Down Converter | TI
The Texas Instruments LMR36015FBRNXT is a 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down DC/DC converter housed in a 12-pin VQFN-HR (RNX) package. It integrates both high-side and low-side power MOSFETs and delivers up to 1.5 A of output current from a wide 4.2 V to 60 V input range, with 66 V transient tolerance for surge immunity per IEC 61000-4-5. The output is adjustable from 1 V to 57 V. What is a synchronous buck converter? A buck converter (step-down switching regulator) is a switched-mode power supply topology that efficiently converts a higher DC voltage to a lower DC voltage by rapidly switching an inductor-capacitor energy transfer network. Synchronous buck converters replace the traditional Schottky rectifier with a low-side MOSFET, which improves efficiency at light loads and reduces conduction losses. Buck converters belong to the broader hierarchy: DC/DC converter -> switching regulator -> power management IC -> semiconductor. Key features of the LMR36015 include 400 kHz switching frequency (typical), 0.4 V dropout at 1.5 A load, junction temperature range of -40 C to +150 C, and pin compatibility with the LMR36006 (60 V, 0.6 A) and LMR33620/LMR33630 (36 V, 2 A or 3 A) families. Functional safety-capable documentation is available to aid ISO 26262 system design, and the device is designed for reliable, rugged industrial applications. The LMR36015 uses peak current-mode control with internal loop compensation, eliminating the need for external compensation components. The 400 kHz switching frequency balances efficiency with small external inductor and capacitor sizing, while the 12-pin VQFN-HR package with thermal pad enables high power density designs. Integrated input transient protection up to 66 V reduces external TVS component count. Typical applications include industrial programmable logic controllers (PLCs), factory automation sensors, motor control auxiliary rails, building security cameras, and grid-tied energy metering. The 60 V input rating makes it well suited for 24 V and 48 V industrial bus architectures. When designing with the LMR36015, use the WEBENCH Power Designer tool to validate component selection. The exposed thermal pad must be soldered to a ground copper pour of at least 50 mm squared to achieve the rated thermal performance. Input capacitance should be sized for 4.7 uF minimum with low-ESR ceramic to handle input ripple current. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet, including AEC-Q100 automotive variant recommendations and cross-brand alternatives.
LMR36015FSC3RNXTQ1 - 60V 1.5A Synchronous Buck Converter | TI
The Texas Instruments LMR36015FSC3RNXTQ1 is a 4.2-V to 60-V, 1.5-A ultra-small synchronous step-down DC/DC converter that integrates both high-side and low-side power MOSFETs and delivers up to 1.5 A of output current in a compact 12-pin VQFN-HR (RNX) package. The converter supports an input tolerance up to 66 V and a fixed 3.3 V output, with switching frequency options including the 2.1 MHz setting selected by the FSC3 suffix. A buck converter (also called a step-down switching regulator) is a type of switched-mode power supply (SMPS) that efficiently converts a higher DC input voltage to a lower DC output voltage by cycling an integrated power switch and storing energy in an external inductor. Within the broader taxonomy, the buck topology sits under DC-DC converters, then under switching regulators, then under power management ICs, and finally under semiconductors. The LMR36015 belongs to TI's SIMPLE SWITCHER family and is AEC-Q100 qualified for automotive environments. Key features include peak-current-mode control for optimal efficiency and output voltage accuracy, advanced high-speed circuitry that supports 400 kHz to 2.1 MHz switching, 0.4-V typical dropout at 1.5 A load, junction temperature range from -40 C to +150 C, and 66 V input transient protection. The VQFN-HR (RNX) package enables a footprint of approximately 3 mm x 3 mm with an exposed thermal pad, suiting space-constrained PCB layouts. The device uses peak-current-mode control, which provides cycle-by-cycle current limiting, simpler compensation, and better load-step response than voltage-mode control. Internal MOSFETs and the small package allow single-layer PCB layouts in many cases, reducing solution cost and complexity for industrial and automotive designers who need to minimize PCB area. Typical applications include automotive infotainment and ADAS sensor rails, industrial PLC and factory automation supplies, battery-powered equipment with 12 V/24 V/48 V buses, and general-purpose 24-V industrial point-of-load conversion. The 60-V absolute-max input withstands load-dump transients typical of 12 V automotive rails. When designing with this part, observe the minimum 400 uH to 4.7 uH inductor range, use ceramic input/output capacitors rated for the application's voltage, and ensure the exposed pad is soldered to a sufficient copper pour for thermal dissipation. A feedforward capacitor in the feedback path may be required for designs demanding optimum transient response. This page synthesizes distributor pricing, AEC-Q100-qualified alternatives, application references, and design notes not found in the manufacturer datasheet alone, providing a single consolidated reference for engineering and procurement teams.
LMR36015SC3QRNXTQ1 - 60V 1.5A Sync Buck Converter | TI
The Texas Instruments LMR36015SC3QRNXTQ1 is a 1.5 A synchronous step-down (buck) DC/DC converter in a 12-pin VQFN-HR HotRod package, qualified to AEC-Q100 for automotive applications. It operates over a 4.2 V to 60 V input range with 66 V transient tolerance, delivers a fixed 3.3 V output, and uses peak-current-mode control for optimal efficiency and accuracy. Integrated high-side and low-side MOSFETs minimize external component count. A buck (step-down) DC/DC converter is a switching voltage regulator that reduces a higher DC input voltage to a lower, well-regulated DC output voltage by rapidly switching an internal MOSFET and filtering the resulting PWM waveform through an LC network. Within the power management hierarchy, buck converters sit above LDOs and below isolated DC/DC modules; their higher efficiency at large input-to-output differentials makes them the workhorse of automotive, industrial, and telecom point-of-load rails. Synchronous topologies replace the rectifier diode with a second MOSFET to push peak efficiency into the mid-90% range. Key specifications include 1.5 A continuous output current, 4.2 V to 60 V operating input range, 66 V transient tolerance, fixed 3.3 V output, and 400 kHz typical switching frequency (jumper-selectable up to 2.1 MHz for small external components). Advanced high-speed loop response and HotRod flip-chip packaging minimize EMI while maximizing power density. The pinout is designed for simple PCB layout, and the family shares pin compatibility with LMR36006 (60 V, 0.6 A) and LMR33620/LMR33630 (36 V, 2 A or 3 A) for scalable designs. The HotRod package replaces traditional wire bonds with copper pillar flip-chip bumps, dramatically shrinking package-to-die ratio and lowering parasitic inductance. This enables the LMR36015-Q1 family to switch at 2.1 MHz while keeping EMI below CISPR 25 automotive limits, eliminating bulky shielding and snubber networks. Peak current mode control provides cycle-by-cycle overcurrent protection and simplifies loop compensation. Typical applications include automotive infotainment and ADAS sensor power rails, industrial 24 V/48 V PLC and factory-automation supplies, telecom 48 V PoL converters, battery-powered motor drives, and any distributed power bus where 60 V tolerance is required. The device is also suited for USB-PD and general-purpose wide-Vin step-down designs. When designing, verify that the input bulk capacitance handles 60 V plus ripple, and that the feedback loop compensation matches the chosen switching frequency. Use the TI WEBENCH Power Designer tool for validated BOM generation and thermal analysis. This page synthesizes distributor pricing, AEC-Q100 qualification status, pin-compatible alternatives within the LMR360xx family, and practical design notes not collected on the manufacturer datasheet front page.
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.
LP2951CMX/NOPB - 100mA Micropower LDO | Texas Instruments
Texas Instruments LP2951CMX/NOPB is a low-dropout linear regulator with a 100 mA output current, 1.24 V to 29 V adjustable output, and 2.3 V to 30 V input range, packaged in an 8-pin SOIC. It is designed for low-power systems where battery efficiency, simple regulation, and fault monitoring are important. A low-dropout regulator, or LDO, is a linear voltage regulator that maintains a stable output with a small difference between input and output voltage. The LP2951 belongs to the micropower LDO category, combining a low typical quiescent current of 75 µA with low-dropout operation. This makes it suitable for battery-powered instrumentation, sensor nodes, industrial controls, and portable equipment where supply current affects battery life. The LP2951CMX/NOPB supports adjustable regulation through external resistors and includes system-level features described in the verified sources: an external shutdown input, a low-output-voltage alarm, and current and temperature limiting. Its 100 mA rating is appropriate for low-load analog, control, and embedded systems rather than high-current power conversion. The 8-pin SOIC package supports conventional surface-mount assembly. The regulator's output can be set from 1.24 V to 29 V according to the verified component data, while its input range is 2.3 V to 30 V. The low-dropout architecture helps maintain regulation when the input approaches the programmed output. Because the output current is limited to 100 mA, thermal design and load transients should be checked carefully in each application. Typical uses include regulated 3.3 V, 5 V, or adjustable rails for microcontrollers, sensor interfaces, low-power transceivers, and embedded systems. The shutdown input allows a controller to disable the regulator, while the alarm output can signal a falling input voltage or an approaching output undervoltage condition. For reliable operation, place the regulator's input and output capacitors close to the device, verify the external feedback resistors for the intended output voltage, and confirm that the load current remains within the 100 mA rating. This page consolidates distributor listings, cross-reference results, and application guidance for engineering selection.
LP2981IM5X-3.0 - 100mA Micropower LDO, 3.0V Fixed | Texas Instruments
The Texas Instruments LP2981IM5X-3.0 is a micropower 100 mA ultra-low-dropout (LDO) linear regulator with a fixed 3.0 V output, housed in a 5-pin SOT-23 (DCK) package. It delivers up to 100 mA of continuous load current from a 2.5 V to 16 V input rail and is engineered for tight output accuracy across line, load, and temperature variations. According to the TI datasheet, the LP2981-N provides ±1% output accuracy (new chip) and a low quiescent current in the microampere range, ideal for battery-powered and always-on designs. What is an LDO (Low-Dropout) linear regulator? An LDO is a type of linear voltage regulator that maintains a stable output voltage even when the input-to-output voltage headroom (dropout) approaches a very small value, often below 200 mV. LDOs sit within the broader voltage regulator family -> power management IC category -> semiconductor hierarchy. Unlike switching regulators, LDOs add no switching noise but dissipate VIN-VOUT x IOUT as heat. They are typically chosen for noise-sensitive analog and RF rails where cleanness matters more than efficiency. Key features include a 3.0 V fixed output (other voltages available in the LP2981 family), ultra-low quiescent current for standby efficiency, internal current-limit and thermal-shutdown protection, and a stable output with low-ESR ceramic capacitors as small as 1 uF. The new-chip revision (post-NSC) supports an extended 2.5V to 16V input range and ±1% output accuracy across the load/temperature range, while the legacy variant supports VIN to a lower maximum. Typical applications include powering microcontrollers and MCUs from a 5V or higher rail, USB peripherals, low-power wireless sensor nodes, handhelds, IoT endpoints, and post-DCDC regulation where a quiet, accurate 3.0V rail is needed after a switching pre-regulator. The SOT-23-5 footprint suits space-constrained PCB layouts. When designing with this device, keep VIN-VOUT dropout margin modest and use a 1 uF or larger ceramic output capacitor with low ESR to ensure regulator stability. Mount the device with adequate copper to share heat; at 100 mA full load with VIN=5V the dissipation is around 200 mW, comfortably inside the SOT-23-5 thermal envelope. This page synthesizes current distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.