Преобразователи DC-DC
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LT8609SIV#PBF - 42V 2A/3A Peak Sync Buck Regulator | Analog Devices
The Analog Devices LT8609SIV#PBF is a compact, high-efficiency, high-speed synchronous monolithic step-down switching regulator that consumes only 1.7 µA of non-switching quiescent current, housed in a 16-pin TFQFN exposed-pad package. It delivers 2 A of continuous output current with peak loads up to 3 A for less than 1 second, accepts input voltages from 3.0 V to 42 V, and produces an adjustable output as low as 0.782 V. A buck switching regulator (step-down converter) is a type of DC-DC switching regulator that efficiently converts a higher DC input voltage to a lower DC output voltage using an internal switch, an external inductor, and control loop. Synchronous buck regulators use a MOSFET in place of the traditional freewheeling diode to reduce conduction loss and improve efficiency, especially at high load currents. The LT8609S sits within the power management hierarchy of: switching regulator -> DC-DC converter -> voltage regulator -> power management IC -> semiconductor. Key features include a 1.7 µA quiescent current that makes the part ideal for always-on applications, a wide 3.0 V to 42 V input range that survives automotive load-dump transients, and a programmable output down to 0.782 V for powering modern low-voltage MCUs and SoCs. The part uses a constant-frequency peak current-mode architecture up to 2 MHz, and the SYNC/MODE pin allows synchronization to an external clock. Internal MOSFETs (top + bottom) eliminate the need for an external Schottky diode. The LT8609S uses a peak current-mode control architecture with a precision reference and internal loop compensation, which simplifies schematic design by reducing the external component count to just an inductor, input/output capacitors, and feedback resistors. The 42 V absolute maximum input makes the part attractive for 12 V and 24 V industrial or automotive buses. The exposed pad on the TFQFN-16 package provides a low theta_JA thermal path for sustained 2 A operation. Typical applications include automotive always-on systems, industrial 24 V sensor and actuator rails, battery-powered portable instruments, and general-purpose 5 V/3.3 V/1.8 V point-of-load conversion in telecom and factory automation. The low IQ also makes the part attractive for solar- or battery-energy-harvested systems. When designing with the LT8609S, place the input capacitor as close as possible to the IN and GND pins to minimize switching loop area and EMI. Choose the inductor based on the 1.5 A to 3 A saturation current rating to handle the peak current-mode ripple. Use a feedforward capacitor (CFF) in parallel with the top feedback resistor to improve transient response when VOUT is well above the 0.782 V reference.
LT8614IUDC - 42V 4A Sync Step-Down Silent Switcher | ADI
The Analog Devices LT8614IUDC is a 42V, 4A synchronous step-down Silent Switcher regulator with 2.5 uA quiescent current, housed in a 20-pin 3mm x 4mm QFN package with exposed pad. The IUDC suffix denotes the industrial temperature grade (-40C to +125C operating junction range) and a specific reel-pack orientation. The part accepts input voltages from 3.4V to 42V and delivers an adjustable output from 0.97V to 41.8V at up to 4A continuous output current. A buck (step-down) switching regulator is a DC-DC converter topology that produces a lower regulated output voltage from a higher input voltage by rapidly switching an inductor-capacitor energy-transfer network. The Silent Switcher architecture used here is a proprietary Analog Devices technique combining internal layout, controlled switching-edge rates, and an optional spread-spectrum frequency modulation mode to minimize EMI emissions while preserving high efficiency. Within the broader power management hierarchy, the LT8614IUDC is a member of the monolithic synchronous buck regulator subclass, which sits under the wider category of switched-mode power supply (SMPS) ICs. Key features include a minimum on-time of approximately 30 ns enabling high step-down ratios at high switching frequencies, internal synchronous power switches that eliminate the external Schottky diode, and a Burst Mode operation that drops quiescent current to 2.5 uA at no load for battery-powered applications. A power-good (PG) open-drain output flags output-in-regulation, the SYNC pin accepts an external clock or selects between Burst Mode and pulse-skipping modes, and the TR/SS pin enables soft-start and tracking. The integrated MOSFET design yields peak efficiency above 95% at moderate loads. Typical applications include automotive and industrial 24V/12V bus step-down conversion, point-of-load regulation in distributed power architectures, battery-powered portable equipment that benefits from the 2.5 uA Iq, and noise-sensitive systems that leverage Silent Switcher EMI performance to ease CISPR 25 / FCC Class B compliance. The wide VIN range also supports telecom 48V nominal rails after a front-end protection circuit. When designing with the LT8614IUDC, place input capacitors as close to the PVIN and PGND pins as possible to minimize switching-current loop area; the exposed pad must be soldered to a sufficiently large copper pour for thermal dissipation. At 4A load with a 12V to 3.3V conversion, the IC dissipates roughly 1W; thermal relief is generally adequate from a 1 square inch copper pour. This page synthesizes the verified web datasheet values, drop-in same-package alternatives (including the LT8614HUDC automotive grade), current distributor pricing as of 2026-10-08, and practical design notes not found directly in the manufacturer datasheet, giving engineers a faster procurement and design-decision path.
LT8614IUDC#PBF - 42V 4A Silent Switcher Buck | Analog Devices
The Analog Devices LT8614IUDC#PBF is a 42 V, 4 A synchronous step-down DC-DC converter using Silent Switcher architecture to minimize EMI emissions, with an adjustable output down to 0.97 V and integrated power switches in a 20-lead WFQFN package with exposed pad. It is designed for efficient point-of-load and industrial power conversion where high switching frequency, low quiescent current, and compact layout are important. A synchronous buck converter is a DC-DC regulator that uses integrated high-side and low-side switches to transfer energy efficiently while reducing output voltage from a higher input rail. The LT8614 belongs to the voltage-regulator hierarchy within power-management ICs and uses Analog Devices Silent Switcher architecture to control EMI emissions during high-frequency operation. Its monolithic construction helps reduce external component count and supports compact converter layouts. The verified product data identifies operation from 3.4 V to 42 V input, 0.97 V to 41.8 V adjustable output, and up to 4 A output current. Efficiency reaches 96% at 1 MHz and 94% at 2 MHz according to the verified distributor data. Burst Mode operation provides 2.5 µA quiescent current for 12 VIN to 3 V regulation in the cited operating condition, making the device suitable for low-power and battery-influenced systems when the converter is not carrying heavy load. The SYNC pin supports clock synchronization and selection of Burst Mode or pulse-skipping operation, while TR/SS provides soft-start and tracking functions. These features help control inrush current and coordinate multiple rails in systems where sequencing or load sharing matters. The exposed-pad QFN package supports improved heat transfer when the PCB provides adequate copper area. Typical uses include industrial 24 V or 36 V rail conversion, telecom and networking equipment, robotics, instrumentation, and compact embedded systems. Its wide input range covers automotive-style transient headroom when designed with appropriate upstream protection, but the verified data does not establish AEC-Q100 qualification for this exact suffix. For implementation, check the complete datasheet pinout, compensation or voltage-setting details, switch-current limits, and thermal limits against the exact LT8614IUDC#PBF ordering code. Place input and output capacitors close to their corresponding pins, provide a continuous ground path, and use the exposed pad as a thermal interface rather than an isolated copper island.
LT8620EMSE - 65V, 2A Sync Buck Regulator, 2.5uA IQ | ADI
The Analog Devices LT8620EMSE is a 65V, 2A synchronous monolithic step-down switching regulator housed in a 16-pin MSOP package with exposed pad (MSE). It accepts a wide input voltage range of 3.4V to 65V and consumes only 2.5 uA of quiescent current, making it well-suited for always-on and battery-powered applications. The output is adjustable from 0.97V to 64.75V via an external resistor divider. A buck (step-down) switching regulator is a type of DC-DC converter that produces a lower regulated output voltage from a higher unregulated input voltage. Buck regulators sit in the power management IC (PMIC) hierarchy beneath linear regulators, LDOs, and switching converters. They are the dominant topology for point-of-load (PoL) conversion in industrial, automotive, and telecom systems because they achieve much higher efficiency than linear regulators by rapidly switching an inductor between the input and ground. Key features include integrated top and bottom power switches, low-ripple Burst Mode operation that maintains high efficiency at light loads, internal compensation, and an exposed thermal pad for low thermal resistance. The device operates at a typical switching frequency around 2.2 MHz with the internal oscillator. According to the Analog Devices LT8620 datasheet (8620fa), the part supports synchronization to an external clock across the operating range. The LT8620 uses a current-mode control architecture with an integrated high-side and low-side MOSFET pair, eliminating the need for an external Schottky diode in most applications. This monolithic integration reduces BOM count, PCB area, and EMI compared to controller-plus-discrete-FET designs. The wide 3.4V to 65V input range handles transient spikes on 12V, 24V, and 48V rails, including load-dump events in automotive systems. Typical applications include 4-20 mA loop-powered industrial sensors, automotive ECU and infotainment supplies, 48V telecom point-of-load conversion, battery-powered equipment, and distributed supply rails in factory automation. Its 2.5 uA quiescent current also makes it a strong candidate for always-on housekeeping rails in energy-harvesting or solar-powered nodes. When designing with this part, evaluate the trade-off between efficiency and EMI: Burst Mode operation maximizes light-load efficiency but produces lower-frequency output ripple; pulse-skipping or forced-continuous modes trade some efficiency for predictable spectrum. The exposed pad must be soldered to a sufficient copper pour to meet thermal ratings at 2A continuous load. This page synthesizes distributor pricing, same-family and cross-brand drop-in alternatives in the same MSOP-16 EP package, and practical design notes not found in the manufacturer datasheet alone.
LT8640EUDC#TRPBF - 42V 5A Sync Buck Silent Switcher | ADI
The Analog Devices LT8640EUDC#TRPBF is a 42 V, 5 A synchronous step-down Silent Switcher regulator housed in a 20-lead (18-pin) LQFN/WFQFN exposed-pad package. It accepts an input range of 3.4 V to 42 V and delivers an adjustable output from 0.97 V up to 41.58 V at up to 5 A continuous load current, with switching frequencies programmable up to 3 MHz. A buck switching regulator (also called a step-down DC-DC converter) is a power management IC that converts a higher DC input voltage to a lower DC output voltage with high efficiency by rapidly switching an internal power MOSFET and filtering the resulting pulsed waveform through an LC network. Buck regulators sit within the broader power management IC category and are the dominant topology for point-of-load regulation on distributed power rails. Key differentiating specifications of the LT8640EUDC#TRPBF include the proprietary Silent Switcher architecture that minimizes EMI emissions to meet stringent automotive and industrial radiated-noise limits, an ultralow 2.5 µA quiescent current that keeps the output in full regulation at no load (critical for always-on battery applications), and a fast 30 ns minimum top-switch on-time that enables high VIN-to-low-VOUT conversion at high frequency. The SYNC/MODE pin selects between Burst Mode operation, spread-spectrum mode, external clock synchronization, and pulse-skipping/forced-continuous modes. Internally the LT8640EUDC#TRPBF uses synchronous rectification with internal top and bottom power switches, eliminating the need for an external Schottky diode. The device integrates loop compensation, an internal reference, and precision enable/UVLO functions, shrinking the external BOM to input/output capacitors plus an inductor and feedback divider. Typical applications include automotive always-on systems, industrial 24 V/36 V bus point-of-load rails, battery-powered portable equipment, and any noise-sensitive environment where CISPR 25 radiated EMI compliance is required. Designers value the 2.5 µA Iq for quiescent-sensitive designs. When designing with this regulator, choose an inductor sized for the switching frequency and ripple current, place input ceramic capacitors within 1-2 mm of the VIN and GND pins, and ensure the exposed pad has adequate copper area for thermal dissipation since 5 A load at high VIN generates substantial heat. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical PCB/layout design notes not consolidated in any single manufacturer document.
LT8640IUDC-1 - 42V, 5A Sync Buck Silent Switcher | Analog Devices
The Analog Devices (formerly Linear Technology) LT8640IUDC-1 is a 42V input-capable, 5A synchronous step-down Silent Switcher regulator housed in a 20-lead (18-pin exposed pad) 4mm x 3mm QFN plastic package, operating over the -40C to +125C industrial junction-temperature range. It features a wide 3.4V to 42V input range, 0.97V to 41.58V adjustable output, 200kHz to 3MHz programmable switching frequency, and 2.5µA quiescent current with the output in full regulation at light loads. An LDO (low-dropout linear regulator) and buck (step-down) DC-DC converter are two distinct topologies in the power-management IC family tree. Both belong to the broader category of voltage regulators, but an LDO uses a series pass element to dissipate VIN-VOUT as heat, while a buck converter switches an inductor to deliver power with much higher efficiency. The LT8640IUDC-1 is a monolithic synchronous buck converter that integrates the high-side and low-side MOSFETs, eliminating the external Schottky diode typical of older buck designs and reducing BOM count. Key features of the LT8640IUDC-1 include Analog Devices' Silent Switcher architecture, which minimizes EMI emissions by containing the high-dV/dt switching node loops, enabling compliance with CISPR 224 likely-class radiated and conducted limits without a shield. It delivers 5A continuous output at high efficiency, has a 30ns minimum on-time that allows high-frequency step-down at high VIN to low VOUT, and offers Burst Mode operation, spread-spectrum modulation, and external clock synchronization through the SYNC/MODE pin. The -1 suffix designates forced-continuous operation, in contrast to the standard LT8640 which uses pulse-skipping at light loads. The LT8640IUDC-1 is particularly well-suited to automotive and industrial applications where the input rail can see load-dump transients up to 42V and where EMI compliance is critical. Typical use cases include 24V industrial sensor rails, automotive infotainment, point-of-load supplies downstream of a 12V or 24V bus, and battery-powered systems where 2.5µA quiescent current dramatically extends standby life. A 10µF minimum output capacitor with low ESR is required to keep the control loop stable. When designing with this part, ensure the input capacitor is ceramic and placed close to the VIN and PGND pads, and that the exposed pad is soldered to a sufficiently large copper pour for thermal dissipation - at 5A load with large VIN-VOUT, the LT8640IUDC-1 can dissipate several watts. This page synthesizes distributor pricing, drop-in alternatives including the AEC-Q100 automotive-grade variant and the 3.5A 65V LT8641, and practical design notes not found in the manufacturer datasheet.
LT8640IUDC-1#PBF - 42V, 5A Sync Silent Switcher Buck | ADI
The Analog Devices LT8640IUDC-1#PBF is a 42V, 5A synchronous step-down Silent Switcher regulator with adjustable output from 0.97V to 41.58V, housed in a 20-WFQFN exposed-pad package (18 leads, 3mm x 4mm). It supports a wide 3.4V to 42V input range, switches up to 3 MHz, and delivers 5A continuous output current with a 30 ns minimum top switch on-time for high-VIN-to-low-VOUT conversion. The Silent Switcher architecture minimizes EMI/EMC emissions while maintaining high efficiency across the load range. A buck switching regulator (step-down DC-DC converter) is a type of switched-mode power supply that converts a higher DC input voltage to a lower DC output voltage using an internal MOSFET switch, inductor, and capacitor energy-storage network. Within the power management IC hierarchy, buck regulators sit alongside LDOs and boost converters as the primary means of efficient point-of-load voltage conversion in systems ranging from automotive 12 V/24 V buses to industrial 24 V backplanes. Key features include forced continuous PWM operation at light load (LT8640-1 variant), selectable Burst Mode, spread-spectrum mode, and external SYNC capability through the SYNC/MODE pin. The 30 ns minimum on-time enables large step-down ratios at high frequency, and quiescent current is rated at 2.5 uA in Burst Mode operation. The device uses monolithic synchronous MOSFETs and current-mode control, with internal compensation and a thermally enhanced QFN exposed pad for 5A delivery. According to the manufacturer datasheet, the LT8640-1 variant differs from the standard LT8640 by using forced continuous PWM at light loads instead of pulse-skipping, making it preferable where low noise and predictable switching frequency are required. Typical applications include automotive 12 V/24 V point-of-load regulation, industrial 24 V sensor and motor-control rails, telecom 48V stepping to logic rails, and battery-powered systems requiring wide VIN range. The Silent Switcher topology suits noise-sensitive environments adjacent to RF or analog circuits. Design tip: keep the input capacitor loop and the two internal hot loops (top FET and bottom FET) symmetrical and as compact as possible; the Silent Switcher architecture relies on this symmetry to cancel magnetic field emissions. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical EMI/layout design notes not collected in a single place in the manufacturer datasheet.
LT8640SEV#PBF - 42V 6A Silent Switcher 2 Buck Regulator | ADI
The Analog Devices (formerly Linear Technology) LT8640SEV#PBF is a 42 V, 6 A synchronous step-down Silent Switcher 2 regulator housed in a 24-lead LQFN package with exposed pad. The device accepts an input voltage range of 3.4 V to 42 V and delivers an adjustable output from 0.97 V to 10 V at up to 6 A continuous load current, with internal synchronous switches and a typical quiescent current of 2.5 uA in Burst Mode operation. An LDO (Low-Dropout) linear regulator maintains a stable output even when VIN approaches VOUT; a switching buck regulator like the LT8640SEV instead steps a higher DC input voltage down to a lower DC output with much higher efficiency by rapidly toggling an internal MOSFET and storing energy in an external inductor. Within the broader power-management hierarchy, the buck converter sits alongside the boost, buck-boost, and LDO families, all of which fall under the parent category of DC-DC voltage regulators and, more generally, power management ICs. Key features include ADI's Silent Switcher 2 architecture which minimizes EMI by integrating the switching loop capacitors and using a quiet supply, plus a 30 ns minimum top switch on-time enabling high VIN-to-low VOUT conversion at high frequency. The 24-pin 4 mm x 4 mm LQFN exposed-pad package achieves a thermal resistance of approximately 23 C/W on a properly designed 4-layer PCB, supporting full 6 A operation without an external heatsink at moderate VIN-VOUT deltas. Additional capabilities include external clock synchronization via SYNC/MODE pin, spread-spectrum frequency modulation, internal compensation, and an operating junction temperature range of -40 C to +125 C (E-grade). Architecturally, the LT8640SEV combines peak current-mode control with internal top and bottom MOSFET switches rated to handle 42 V transients, eliminating the need for an external Schottky diode in most applications. The Silent Switcher 2 topology integrates the bypass capacitors on-die to minimize the high-frequency switching loop area, dramatically reducing radiated EMI versus conventional buck regulators and simplifying PCB layout for CISPR 25 Class 5 compliance. Typical applications include automotive infotainment and ADAS sensor power rails, industrial 24 V bus point-of-load conversion, portable instrumentation, and any noise-sensitive system that requires high-current, high-efficiency step-down conversion with low EMI. Compared to a conventional buck regulator at the same current, the LT8640SEV achieves 95%+ peak efficiency and emits roughly 25 dB less radiated noise. When designing with this part, prioritize a small, symmetric input capacitor loop placed adjacent to the VIN and PGND pins on the exposed pad, and use a 4-layer PCB with the inner layer as a continuous ground plane to dissipate 6 A at 12 V to 3.3 V without thermal throttling. Choose the inductor per ADI's design tools to balance ripple, efficiency, and transient response. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes drawn from the LT8640S family datasheet, evaluation kit documentation, and reference designs - information not assembled on any single manufacturer or distributor page.
LT8640SEV-2#PBF - 42V, 6A Synchronous Step-Down Silent Switcher | ADI
The Analog Devices LT8640SEV-2#PBF is a 42 V, 6 A synchronous step-down Silent Switcher 2 regulator housed in a 24-lead LQFN (4 mm x 6 mm) exposed-pad package. The -2 variant is optimized for ultra-low EMI/EMC emissions through Analog Devices' second-generation Silent Switcher architecture, while delivering up to 6 A of continuous output current from a 3.4 V to 42 V input rail with adjustable output from 0.97 V to 41.58 V. What is a Silent Switcher buck regulator? A synchronous buck converter is a switch-mode DC-DC topology that steps down a higher input voltage to a lower regulated output using a pair of MOSFET switches and an LC output filter; it replaces a traditional buck diode with a synchronous MOSFET to reduce conduction loss. The Silent Switcher 2 architecture further minimizes EMI by splitting the input hot loop into symmetrical parallel paths, enabling the LT8640SEV-2 to meet CISPR 25 / CISPR 32 Class 5 radiated and conducted EMI limits with minimal filtering, which is essential for noise-sensitive automotive and industrial designs. Key specifications include a 30 ns minimum on-time that supports high step-down ratios even at 2 MHz switching frequency, 96% peak efficiency, 2.5 uA quiescent current in Burst Mode operation, and 200 kHz to 3 MHz programmable switching frequency. The device supports spread-spectrum frequency modulation, external clock synchronization, pulse-skipping, and forced continuous modes through the SYNC/MODE pin, and includes internal loop compensation to simplify PCB design. The 24-LQFN exposed pad provides low thermal resistance for sustained 6 A operation. The peak current-mode control architecture with 30 ns minimum top switch on-time enables high VIN-to-low-VOUT conversion at high switching frequencies (e.g., 24 V to 1.0 V at 2 MHz). Internal MOSFETs are optimized for both high efficiency and thermal performance, supporting up to 6 A continuous load with no external heatsink required when VIN-VOUT differential is moderate. Typical applications include automotive infotainment and ADAS power rails, industrial 24 V bus to point-of-load conversion, battery-powered systems (12 V / 24 V / 36 V Li-ion stacks), GPS / telematics modules, and low-EMI communications infrastructure. The 2.5 uA quiescent current also makes it suitable for always-on bias supplies. Design trade-off: the -2 variant is specified for tighter EMI compliance but is otherwise equivalent to the LT8640SEV; the standard -1 (LT8640S/LT8640SA) and non-EMI -2 variants coexist on the same datasheet for design flexibility. Always place input ceramics directly at the VIN and PGND pins to maximize the benefit of Silent Switcher 2. This page synthesizes distributor pricing, verified drop-in alternatives from the LT8640S / LT8643S-2 family, and practical design notes not duplicated in the manufacturer datasheet, providing an engineer-ready decision matrix for selecting the right synchronous buck for low-EMI applications.
LT8640SIV#PBF - 42V, 6A Silent Switcher 2 Buck | Analog Devices
The Analog Devices LT8640SIV#PBF is a 42V, 6A synchronous step-down Silent Switcher 2 regulator that minimizes EMI emissions while delivering high efficiency at high switching frequencies, housed in a 24-pin LQFN (LGA-style) exposed-pad package. It features a wide 3.4V to 42V input range, an adjustable output from 0.97V to 10V (up to 41.58V max), and an industry-leading 2.5 µA quiescent current that makes it ideal for always-on applications. The second-generation Silent Switcher architecture integrates internal bypass capacitors and optimized current loops, achieving advertised EMI performance with simplified PCB layout. A buck (step-down) switching regulator is a type of DC-DC converter that uses an energy-storage inductor and synchronous MOSFET switches to convert a higher input voltage into a lower regulated output voltage with high efficiency. Within the broader power management hierarchy, the LT8640SIV#PBF belongs to the family of synchronous step-down regulators, which sit above simple linear regulators and below multi-phase point-of-load converters. The Silent Switcher architecture in particular addresses EMI - a chronic challenge for switching regulators - by tightly controlling the high-di/dt current loops that normally radiate noise, eliminating the need for complex shielding or filtering in many designs. Key specifications include 6A continuous output current, 95% peak efficiency, and a maximum switching frequency up to 3 MHz when configured for low-noise operation. The exposed thermal pad (LQFN-24 with EP) provides low thermal resistance for sustained high-current delivery without external heatsinking. Additional features include internal compensation, internal bootstrap, power-good flag, external synchronization input, and spread-spectrum frequency modulation for further EMI reduction. The output voltage is set by a single external resistor divider. Typical applications span automotive always-on systems, industrial 24V bus converters, portable instrumentation, battery-powered equipment, and noise-sensitive analog/mixed-signal rails. The ultra-low 2.5 µA quiescent current is particularly valuable in automotive cold-crank and e-call systems where the battery must power standby loads for weeks without recharge. The wide 42V input withstands load-dump transients common in 12V and 24V automotive environments, while the 3 MHz switching capability supports single-chip small-form-factor designs without am radio band interference. When designing with the LT8640SIV#PBF, place input capacitors as close as possible to the VIN and PGND pins to minimize the high-frequency current-loop area; this preserves the Silent Switcher 2 EMI advantage. Use a minimum of 4.7 µF X7R ceramic input capacitance and a 22 µF or larger output capacitor for stable operation across the full load range. This page synthesizes distributor pricing, same-family ADI drop-in alternatives (including the -2 spread-spectrum variant and the automotive-grade H-speed grade), and practical design notes that go beyond the manufacturer datasheet.
LT8645SEV#PBF - 65V 8A Silent Switcher Buck Regulator | Analog Devices
The Analog Devices LT8645SEV#PBF is a 65 V, 8 A synchronous step-down (buck) regulator that uses Analog Devices' second-generation Silent Switcher architecture to minimize EMI/EMC emissions while delivering high efficiency at high switching frequencies. The device accepts a 3.4 V to 65 V input range, provides an adjustable output from 0.97 V to 25 V, and is housed in a 32-lead LQFN (LQFN-32) package with an exposed pad. A buck (step-down) DC-DC switching regulator converts a higher DC input voltage to a lower DC output voltage by rapidly switching an internal power MOSFET pair and smoothing the resulting chopped waveform with an LC output filter. The LT8645SEV belongs to the broader category hierarchy of synchronous buck regulator -> step-down converter -> DC-DC converter -> power management IC -> semiconductor. The Silent Switcher architecture in this part integrates internal bypass capacitors and uses optimized internal layout to minimize hot-loop parasitic inductance, dramatically reducing EMI compared to conventional buck converters. Key features include 8 A continuous output current, a peak efficiency greater than 95%, ultra-low quiescent current suitable for battery-powered applications, and internal top and bottom N-channel MOSFET switches. The regulator supports 200 kHz to 2.2 MHz switching frequency operation, allowing trade-offs between efficiency and external component size. The exposed pad package provides a low thermal resistance path, critical for high-current operation. Typical applications include automotive always-on systems, industrial 48 V bus point-of-load conversion, distributed power systems, and battery-powered portable equipment where low EMI is required. The wide input voltage range supports harsh automotive cold-crank and load-dump transients. When designing with this device, follow the datasheet reference layout exactly to preserve Silent Switcher performance. Use low-ESR ceramic input and output capacitors placed close to the IC, and route the BST and INTVCC capacitors with short, wide traces. The exposed pad must be soldered to a sufficiently large copper area for thermal dissipation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT8645SEV-2 - 65V, 8A Synchronous Silent Switcher Buck | ADI
The Analog Devices LT8645SEV-2#PBF is a 65V, 8A synchronous step-down Silent Switcher regulator with 2.5 µA quiescent current, housed in a 32-lead LQFN/TFQFN exposed-pad package. It accepts 3.4V to 65V input, delivers an adjustable output from 0.97V up to near-VIN, and uses second-generation Silent Switcher architecture to minimize EMI/EMC emissions while maintaining high efficiency at high switching frequencies. What is a synchronous buck (step-down) regulator? It is a switching DC-DC converter that uses both a high-side and a low-side MOSFET (often integrated) to chop the input voltage and average it through an LC filter, producing a lower regulated output rail with much higher efficiency than a linear regulator. Synchronous buck ICs sit inside the broader power-management IC family, alongside LDOs, boost converters, and charge-pump ICs. The "Silent Switcher" architecture adds careful internal layout, optional internal bypass capacitors, and spread-spectrum frequency modulation to suppress switching noise that would otherwise couple into adjacent analog or RF blocks. Key features include 8A continuous output current, 2.5 µA quiescent current for always-on battery applications, >92% peak efficiency at 12V/5V, integrated 65V internal switches, internal bypass capacitors that reduce EMI, fast minimum on-time of approximately 30 ns for high step-down ratios, and a PGOOD flag, synchronization input, and thermal shutdown. The exposed pad of the 32-TFQFN package gives θJA in the low-30s °C/W range when soldered to adequate PCB copper. Technically, the LT8645SEV-2 uses current-mode control with internal compensation, supports pulse-skipping and Burst Mode operation for light loads, and includes programmable switching frequency from roughly 200 kHz to 2.2 MHz. The 2.5 µA quiescent current is measured when the output is regulated but unloaded - suitable for automotive battery-direct systems that must stay alive in sleep mode. Typical applications include automotive always-on systems, industrial 24V/48V bus rails, telecom point-of-load rails, battery-powered portable instruments, and any noise-sensitive system that previously required a bulky EMI input filter ahead of the switching regulator. For high-frequency operation with low EMI, use the internal bypass option and follow the layout reference in the datasheet. When designing, prioritize a small loop area for the input capacitors and the IC ground return, and provide at least 1 square inch of copper under the exposed pad to manage 8A continuous dissipation. If your design requires higher VIN (>65V) or dual-output capability, look at the LT8646S; if you need 10A, the LT8645S family tops out at 8A on this part number.
LT8645SHV-2#PBF - 65V 8A Silent Switcher Buck | Analog Devices
The Analog Devices LT8645SHV-2#PBF is a 65V, 8A synchronous step-down Silent Switcher regulator with integrated bypass capacitors, housed in a 32-pin LQFN exposed-pad package. It accepts an input range of 3.4V to 65V and delivers an adjustable output from 0.97V to 65V at up to 8A continuous load current, with internal top and bottom power switches. A switching regulator (buck converter) is a type of DC-DC converter that steps a higher DC input voltage down to a lower DC output voltage by rapidly switching an inductor and using energy-storage elements. Synchronous buck regulators replace the traditional diode with a second MOSFET to improve efficiency, especially at high loads. Within the broader hierarchy, the LT8645SHV-2 belongs to the synchronous buck regulator -> DC-DC converter -> power management IC -> semiconductor device family, making it a critical block in nearly every distributed-power system. Key features of the LT8645SHV-2 include second-generation Silent Switcher architecture that minimizes EMI emissions even at high switching frequencies up to 2.2 MHz, internal bypass capacitors to reduce design complexity, 2.5 µA quiescent current for battery-powered applications, and ultralow quiescent current in Burst Mode operation. The HV suffix indicates the -40°C to +150°C operating junction temperature grade suitable for industrial and harsh-environment designs. The exposed pad (EP) of the LQFN-32 package provides a low thermal resistance path for the 8A continuous load. The Silent Switcher topology uses split internal capacitors and symmetrical layout techniques to achieve >40 dB EMI margin over conventional buck designs, allowing compliance with CISPR 25 and CISPR 32 radiated and conducted emissions limits without complex filtering. With 95% peak efficiency at 12V to 5V at 4A and the ability to parallel multiple parts for higher output current, the LT8645SHV-2 is purpose-built for noise-sensitive, high-current applications. Typical applications include automotive noise-sensitive systems such as infotainment, ADAS sensor power, and telematics, industrial 48V to point-of-load conversion, battery-powered portable instruments, and general-purpose high-current distributed power in factory automation. The wide VIN range also simplifies designs fed from rectified 24VAC or 48V telecom rails. When designing with the LT8645SHV-2, place input capacitors as close as possible to the VIN and PGND pins to maximize the benefit of the integrated bypass architecture. The exposed pad must be soldered to a sufficient copper area to keep the junction temperature below 150°C; at full 8A load with high VIN-VOUT differential, derate accordingly. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone, optimized for engineers evaluating the LT8645SHV-2#PBF for high-current, low-EMI power designs.
LT8645SIV#PBF - 65V 8A Silent Switcher 2 Buck | Analog Devices
Analog Devices LT8645SIV#PBF is an adjustable 65V, 8A synchronous step-down regulator using second-generation Silent Switcher 2 architecture, with a minimum output of 0.97V and a 32-lead TQFN exposed-pad package. It combines integrated bypass capability with high-frequency switching to reduce electromagnetic interference while maintaining efficiency. According to the Analog Devices LT8645S/LT8646S product page, the family is designed for demanding industrial, automotive, and communications power rails where both EMI control and output-current capability are important. A synchronous buck converter is a DC-DC voltage regulator that uses high-side and low-side switching transistors to transfer energy from an input rail to a lower output rail through an inductor. The LT8645S belongs to the power-management hierarchy: DC-DC converter, synchronous buck regulator, switching regulator, and semiconductor. Its Silent Switcher 2 architecture integrates features intended to suppress switching-node energy and radiated emissions while supporting operation at high switching frequencies. The LT8645S delivers up to 8A of continuous output current, accepts a broad input range reported by distributors as 3.4V to 65V, and provides an adjustable output beginning at 0.97V. Newark identifies the adjustable output capability and 3.4V-to-65V input range, while DigiKey describes the device as a positive, single-output, 8A synchronous buck regulator. These values make it suitable for reducing higher-voltage buses to lower rails for processors, communications equipment, sensors, and industrial control electronics. The family is specifically engineered to minimize EMI emissions without sacrificing high-frequency operation. Distributed bypass-capacitor integration can simplify high-current layout and improve switching-node behavior compared with conventional layouts that rely entirely on external input bypass arrangements. The result is useful when the power supply must operate beside sensitive analog, RF, measurement, or communications circuitry while maintaining a compact 32-lead TQFN footprint. Typical applications include 48V industrial power distribution, automotive and transportation power systems, GSM and communications infrastructure, and high-current embedded computing. The wide input range allows the regulator to sit directly behind a protected higher-voltage bus, while the adjustable output supports multiple point-of-load rails when paired with appropriate external components. Designers should follow the manufacturer datasheet for the exact pinout, compensation settings, exposed-pad layout, switching-frequency selection, and recommended capacitor and inductor values. Thermal design is especially important at 8A because regulator efficiency and voltage conversion ratio determine dissipation even though the package provides an exposed pad for board-level heat spreading. This page combines verified distributor specifications, package details, sourcing information, application guidance, and engineering design notes. It highlights the LT8645S as a high-current, low-EMI, wide-input buck regulator while avoiding unverified details that should be confirmed against the current Analog Devices datasheet before layout or production release.
LT8645SJV-2#PBF - 65V 8A Silent Switcher Buck Regulator | ADI
The Analog Devices LT8645SJV-2#PBF is a 65V, 8A synchronous step-down (buck) switching regulator IC housed in a 32-pin LQFN exposed-pad (TFQFN-32) package, integrating second-generation Silent Switcher architecture to minimize EMI emissions at high switching frequencies. The output is positive and adjustable from 0.97V up to 65V from a 3.4V to 65V input rail, delivering up to 8A of continuous load current with ultra-low quiescent current of 2.5 uA typical in Burst Mode operation. A buck switching regulator (also called a step-down DC-DC converter) is a type of switched-mode power supply that converts a higher DC input voltage to a lower DC output voltage by periodically switching an inductor and using energy storage elements. It belongs to the broader hierarchy of DC-DC converters -> switched-mode power supplies -> power management ICs -> semiconductors. Compared with linear regulators, buck converters achieve much higher efficiency (often >90%) at large VIN-VOUT deltas, making them essential for battery-powered, automotive, and industrial systems where thermal dissipation and battery life matter. Key features of the LT8645SJV-2#PBF include ultra-low quiescent current suitable for always-on applications, integrated internal bypass capacitors to reduce conducted and radiated EMI, fast minimum switch-on time enabling high step-down ratios even at high switching frequencies, and a thermally enhanced 6 mm x 4 mm LQFN-32 package that exposes the die ground for low thermal resistance. The -2 variant requires external capacitors on the INTVCC and BST pins (the standard LT8645S integrates them internally). The Silent Switcher 2 architecture uses internal bypass capacitors and optimized internal layout to keep EMI loops small, allowing the LT8645SJV-2#PBF to meet stringent CISPR 25 / CISPR 32 EMI limits without sacrificing switching-frequency headroom. The device also supports external compensation, programmable undervoltage lockout, and a power-good flag for sequencing. Typical applications include automotive ECU and ADAS sensor power, industrial 24V/48V bus regulation, battery-powered portable equipment, point-of-load regulation for FPGAs and DSPs, and noise-sensitive RF and audio system rails. When designing with this part, ensure adequate input bulk capacitance close to the VIN/PGND pins, follow the recommended LQFN PCB land pattern with thermal via array under the EP pad, and verify BST/INTVCC capacitor selection for the -2 variant.
LT8646 - 65V, 8A Silent Switcher 2 Buck Regulator | Analog Devices
The Analog Devices LT8646 is a 65V, 8A synchronous step-down Silent Switcher 2 regulator with 2.5 µA quiescent current, housed in a 32-lead TQFN (5 mm × 6 mm) package with exposed pad. It integrates the MOSFETs and internal bypass capacitors that minimise EMI while delivering high efficiency at high switching frequencies. The output voltage is adjustable from 0.97V to VIN using a feedback resistor divider. A buck (step-down) DC-DC switching regulator is a power management IC that converts a higher DC input voltage to a lower DC output voltage with high efficiency by rapidly switching an internal power MOSFET on and off and filtering the resulting pulse train through an LC network. The LT8646 sits within the Silent Switcher 2 family, which adds internal bypass capacitors and carefully balanced loop nodes to keep the high-frequency switching loops inside the package. Compared with conventional buck converters this drastically reduces radiated EMI, making the part well suited to noise-sensitive automotive, industrial and RF applications. Key features include 3V to 65V input voltage range (65V abs max), 8A continuous output current with peak load capability, 2.5 µA quiescent current at light load, and internal bypass capacitors that eliminate the need for an external BST diode or capacitor. The regulator supports spread-spectrum frequency modulation and external frequency synchronisation from 200 kHz to 3 MHz. Built-in protection includes internal soft-start, output over-voltage latch-off, and thermal shutdown. Typical applications include automotive always-on supplies, GSM transceivers, industrial control and 48V telecom point-of-load rails, where high step-down ratios, high current, low EMI, and ultra-low quiescent current are required simultaneously. A typical 12V-to-3.3V/8A design achieves above 95 % efficiency, while a 48V-to-5V/4A conversion reaches above 93 %. When designing with the LT8646, observe the recommended PCB layout in the datasheet with the exposed pad soldered to a continuous ground plane and input capacitors placed within a few millimetres of the IC. The internal bypass network removes most EMI headaches, but the output inductor and feedback trace routing still warrant attention for clean regulation.
LT8646SIV#WPBF - 65V 8A Silent Switcher 2 Buck | ADI
The Analog Devices LT8646SIV#WPBF is a 65 V, 8 A synchronous step-down Silent Switcher 2 regulator housed in a 32-pin LQFN exposed-pad package. It features second-generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies, and integrates the boost capacitor and bypass capacitor inside the package. The device delivers 8 A continuous output current from a 3.4 V to 65 V input range with adjustable output from 0.97 V to 64 V. A buck (step-down) DC-DC switching regulator converts a higher DC input voltage to a lower DC output voltage by rapidly switching an inductor and using energy-storage elements. Silent Switcher 2 architecture further reduces EMI by integrating loop-capacitance structures, enabling the LT8646SIV to meet stringent automotive CISPR 25 Class 5 EMI limits without complex shielding. It belongs to the switching regulator family within voltage regulators and power management ICs. Key specifications include 2.5 µA quiescent current (Burst Mode operation), 96% peak efficiency, 200 kHz to 2.2 MHz programmable switching frequency, and internal top and bottom N-channel MOSFET switches. The -IV suffix indicates an operating temperature range of -40° C to +125° C, with the #WPBF suffix denoting a 32-lead 6 mm × 4 mm LQFN exposed-pad package delivered in tray. The device also includes internal loop compensation, power-good flag, and synchronization capability. Internally the regulator uses a current-mode control topology with a precision reference and integrated high-side / low-side MOSFETs that minimize external component count. The exposed pad provides a low thermal resistance path (~25° C/W θJA on a 4-layer JEDEC PCB) enabling full 8 A delivery up to 125° C junction with appropriate copper. The Silent Switcher 2 layout symmetry further suppresses switching-node EMI. Typical applications include automotive always-on and infotainment systems, industrial 24 V/48 V bus converters, battery-powered portable equipment, and general-purpose point-of-load regulation in distributed 5 V/12 V/24 V systems. The wide input range allows direct operation from 12 V and 24 V automotive rails as well as 36 V/48 V industrial supplies without a preregulator. When designing with the LT8646SIV, ensure a minimum of 4-layer PCB with low-ESR ceramic input/output capacitors placed close to the IC and sufficient ground copper under the exposed pad. Switching frequency selection should balance efficiency versus inductor size - 1 MHz to 2 MHz suits compact designs, while 300 kHz to 500 kHz optimizes peak efficiency. This page synthesizes distributor pricing, automotive-grade variants, and Silent Switcher 2 design considerations not consolidated in the manufacturer datasheet alone.
LTC1474CMS8 - 10uA IQ 320mA Step-Down Converter | Analog Devices
The Analog Devices LTC1474CMS8 is a low-quiescent-current, high-efficiency step-down (buck) switching regulator that delivers up to 320 mA of load current from an MSOP-8 package. It integrates an internal P-channel MOSFET power switch, accepts input voltages up to 18 V (per the LTC1474 family datasheet), and provides an adjustable output starting at 1.23 V with up to 100 % duty cycle for low-dropout operation. According to the Analog Devices LTC1474 datasheet, the device draws only 10 µA typical DC supply current at no load while maintaining the output voltage in regulation. A step-down switching regulator (also called a buck converter) is a DC-DC converter that produces a lower regulated output voltage from a higher input voltage by cycling an internal power switch and storing energy in an external inductor. It belongs to the hierarchy switching regulator -> DC-DC converter -> power management IC -> semiconductor, and is the dominant topology for battery-powered portable products because it delivers higher efficiency than a linear regulator when the input-to-output voltage ratio is large. Key features of the LTC1474CMS8 include 10 µA quiescent current, Burst Mode operation that maintains efficiency across light loads, internal P-channel power switch, and logic-controlled shutdown. The 100 % duty-cycle capability allows the converter to operate as a low-dropout regulator when VIN approaches VOUT, which is critical for maximizing usable battery life. The MSOP-8 footprint keeps the solution footprint small while supporting moderate 320 mA loads. Internally, the LTC1474 uses a current-mode control architecture with Burst Mode switching, a precision bandgap reference, and an integrated synchronous-rectifier-capable P-channel switch. This combination yields high efficiency across a wide load range and excellent line/load transient response. The control loop is internally compensated, which simplifies external component selection. Typical applications for the LTC1474CMS8 include single-cell Li-Ion powered portable instruments, wireless handheld terminals, GPS receivers, and battery-backed alarm or memory-supply rails. It is also well-suited to industrial keep-alive supplies that must run for years from a small battery. When designing with this part, select an inductor rated for the peak switch current (typically 0.5 A to 1 A saturation), use low-ESR ceramic input and output capacitors, and ensure the catch diode (or use the LTC1475 synchronous variant) can handle the recirculating current. Verify that VIN does not exceed the absolute-maximum rating of the package. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, parametric drop-in alternatives in the same MSOP-8 footprint, and practical design notes not collected in a single place elsewhere.
LTC3112EFE#PBF - 15V, 2.5A Sync Buck-Boost DC/DC | Analog Devices
The LTC3112EFE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide 2.7V to 15V input range. Housed in a 20-pin TSSOP (0.173", 4.40mm width) with exposed pad, this converter uses a unique 4-switch, single inductor architecture to provide low noise and seamless operation whether the input voltage is above, below, or equal to the output voltage. The output is positive adjustable from 2.5V up to 14V, making it highly versatile for battery-powered and multi-rail systems. A buck-boost converter is a type of DC-DC switching regulator that can step up or step down an input voltage to produce a regulated output. It is essential in applications where the input voltage can vary above and below the desired output, such as with batteries that discharge over time. The LTC3112 belongs to the family of switching regulators, which are more efficient than linear regulators for large voltage differences, and it is a key component in power management ICs for portable and industrial devices. Key features include a 2.5A continuous output current, a wide 2.7V to 15V input range, and an adjustable output from 2.5V to 14V. The device operates at a fixed frequency (typically 1.2MHz) and offers high efficiency across a broad load range. It includes internal synchronous switches, eliminating the need for external Schottky diodes, and provides low output ripple for noise-sensitive applications. The LTC3112 also features a shutdown mode that reduces quiescent current to microamperes, extending battery life in portable devices. Technically, the LTC3112 uses a 4-switch architecture with a single inductor, which allows seamless transitions between buck, boost, and buck-boost modes. This design minimizes output voltage glitches during mode transitions, a common issue in traditional buck-boost converters. The device includes soft-start to limit inrush current, current mode control for fast transient response, and thermal shutdown protection. The exposed pad on the TSSOP package aids in heat dissipation, allowing the converter to deliver full 2.5A output without excessive junction temperature rise. Typical applications include generating 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. The wide input range and high output current make it ideal for industrial, automotive, and portable electronics where input voltage varies significantly. When designing with the LTC3112, ensure proper inductor selection (typically 2.2µH to 10µH) and adequate input/output capacitance to maintain stability and low ripple. The exposed pad must be soldered to a copper pour for thermal management. Also, consider the trade-off between efficiency and output ripple when choosing the operating mode.
LTC3112EFE#TRPBF - 15V, 2.5A Sync Buck-Boost DC/DC | ADI
The LTC3112EFE#TRPBF from Analog Devices is a fixed frequency synchronous buck-boost DC/DC converter with an extended input and output range. It delivers up to 2.5A output current from a 20-TSSOP exposed pad package. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below or equal to the output voltage. With an input range of 2.7V to 15V and an adjustable output from 2.5V to 14V, it is ideal for battery-powered and industrial applications. A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to a regulated output voltage, regardless of whether the input is higher or lower than the output. This is achieved through a combination of buck and boost topologies, typically using four switches and a single inductor. The LTC3112 belongs to the family of switching regulators, which are power management ICs that convert one DC voltage to another with high efficiency. Unlike linear regulators, switching regulators use inductive energy storage to achieve high efficiency, making them suitable for battery-powered devices where power loss must be minimized. Key features of the LTC3112 include a 2.5A continuous output current, a wide 2.7V to 15V input range, and an adjustable output voltage from 2.5V to 14V. It operates at a fixed frequency of 1.2MHz, allowing the use of small, low-profile inductors and capacitors. The device offers high efficiency up to 95%, and its Burst Mode operation reduces quiescent current to 50uA, extending battery life in light-load conditions. The LTC3112 also includes a power-good indicator, soft-start, and current limit protection. Technically, the LTC3112 uses a 4-switch synchronous rectifier architecture with a single inductor, which minimizes component count and PCB area. The fixed 1.2MHz switching frequency enables a compact solution with low output ripple. The device is designed for low noise operation, making it suitable for noise-sensitive applications such as RF and audio systems. The exposed pad package (TSSOP-20) provides excellent thermal performance, with a thermal resistance of 38°C/W, allowing efficient heat dissipation in high-current applications. Typical applications include portable instruments, battery-powered equipment, industrial power supplies, and point-of-load regulation. The wide input range makes it ideal for systems powered by multi-cell batteries or unregulated wall adapters. The LTC3112's ability to seamlessly transition between buck and boost modes ensures a stable output even as the battery voltage drops below the regulated output. When designing with the LTC3112, it is important to select the inductor and capacitors according to the datasheet guidelines to achieve optimal efficiency and transient response. The exposed pad should be soldered to a large copper area for thermal management. Additionally, the Burst Mode feature can be disabled for applications requiring constant frequency operation.
LTC3112IDE#PBF - 15V, 2.5A Buck-Boost DC/DC | Analog Devices
The LTC3112IDE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices, designed to deliver up to 2.5A output current from a wide input voltage range of 2.7V to 15V. Housed in a 16-pin DFN (4mm × 5mm × 0.75mm) package, this converter uses a unique 4-switch, single inductor architecture to provide low noise and seamless operation when the input voltage is above, below, or equal to the output voltage. This makes it ideal for battery-powered and multi-source systems where the input voltage can vary significantly. A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to a regulated output voltage, regardless of whether the input is higher or lower than the output. It is a key component in power management ICs, enabling efficient power conversion in portable electronics, industrial equipment, and automotive systems. The LTC3112 belongs to the family of switching regulators, which are preferred over linear regulators for their high efficiency, especially when the input-to-output voltage difference is large. Key features of the LTC3112 include a programmable output voltage from 2.5V to 15V, a switching frequency that can be set from 300kHz to 2MHz via an external resistor, and a low quiescent current of 40uA in Burst Mode operation. The device also offers a power good indicator, soft-start, and current limit protection. Its high efficiency, up to 95%, minimizes power loss and heat generation, making it suitable for space-constrained designs. The LTC3112 uses a current-mode control architecture with a 4-switch topology, which allows for seamless transitions between buck, boost, and buck-boost modes. This architecture ensures low output voltage ripple and fast transient response, critical for powering sensitive loads such as RF transmitters and microprocessors. The device also includes a precision 0.6V reference and an internal compensation network, simplifying the external component count. Typical applications include generating 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. The wide input range and high output current make it a versatile choice for many power supply designs. When designing with the LTC3112, it is important to select the inductor and capacitors according to the datasheet guidelines to ensure stability and optimal performance. The switching frequency should be chosen to balance efficiency and component size, and proper PCB layout with short, low-inductance paths is essential for minimizing noise and EMI.
LTC3112IDE#TRPBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112IDE#TRPBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide input voltage range. Its unique 4-switch, single inductor architecture provides low noise and seamless operation when the input voltage is above, below, or equal to the output voltage. The device is available in a 16-lead plastic DFN (4mm × 3mm) package with an exposed pad, suitable for compact power management designs. A buck-boost converter is a type of DC-DC switching regulator that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage may drop below the required rail, or in applications needing a regulated output from a varying input source. The LTC3112 belongs to the family of synchronous converters, which use active switches instead of diodes for higher efficiency, and it is part of the broader power management IC category. Key features include a 2.5A continuous output current, an input voltage range of 2.5V to 15V, and an adjustable output voltage from 2.5V to 15V. The switching frequency is fixed at 1.2MHz, allowing small external components. The device offers high efficiency up to 95%, low quiescent current, and a shutdown mode that reduces supply current to under 1µA. It also includes soft-start, current limiting, and thermal shutdown protection. Technically, the LTC3112 uses a 4-switch architecture with a single inductor, which minimizes noise and component count compared to traditional two-stage solutions. The synchronous rectification improves efficiency, especially at lower output voltages. The device operates in PWM mode at heavy loads and automatically transitions to Burst Mode® operation at light loads to maintain high efficiency across the load range. Typical applications include portable electronics, industrial instrumentation, automotive systems, and battery-powered devices where a regulated output is needed from a varying input source. The wide input range and high output current make it suitable for powering FPGAs, microcontrollers, sensors, and communication modules. When designing with the LTC3112, ensure proper PCB layout with short, wide traces for high-current paths and adequate thermal vias to the exposed pad. The inductor and capacitors should be placed close to the IC to minimize parasitic inductance and noise.
LTC3112MPFE#PBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112MPFE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology). It delivers up to 2.5A output current from an input voltage range of 2.7V to 15V, with an adjustable output voltage from 2.5V to 14V. The device is housed in a 20-pin TSSOP with exposed pad (HTSSOP-20) and operates over the military temperature range of -55°C to +150°C (junction). A buck-boost converter is a type of DC-DC converter that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage can drop below or rise above the required rail. The LTC3112 uses a unique 4-switch, single inductor architecture that provides low noise and seamless transitions between buck, boost, and buck-boost modes, ensuring a stable output regardless of input variations. Key features include a switching frequency of 750kHz, which allows for small external components, and a high efficiency synchronous design that eliminates the need for an external Schottky diode. The device also includes a built-in soft-start, overcurrent protection, and thermal shutdown. The exposed pad on the TSSOP package aids in thermal dissipation, making it suitable for high-current applications. The LTC3112MPFE#PBF is designed for a wide range of applications, including 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. Its wide input range and high output current make it a versatile choice for portable and industrial equipment. When designing with this converter, pay attention to the inductor selection and PCB layout to minimize noise and ensure stability. The exposed pad should be soldered to a large copper area for effective heat sinking. The LTC3112MPFE#PBF is RoHS compliant and lead-free, making it suitable for environmentally conscious designs.
LTC3112MPFE#TRPBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112MPFE#TRPBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide 2.7V to 15V input range. Housed in a 20-pin TSSOP with exposed pad (TSSOP-20EP), this device provides a positive adjustable output from 2.5V to 14V, making it ideal for systems powered by multiple cell chemistries or fluctuating supply rails. A buck-boost converter is a type of DC-DC switching regulator that can step up or step down an input voltage to produce a regulated output, regardless of whether the input is higher, lower, or equal to the output. This capability is essential in battery-powered devices where the battery voltage naturally declines over discharge, or in systems that must operate from a variety of power sources. The LTC3112 belongs to the family of synchronous switching regulators, which use internal MOSFETs for both high-side and low-side switches to achieve high efficiency and eliminate the need for an external Schottky diode. Key features of the LTC3112 include a unique 4-switch, single inductor architecture that provides low noise and seamless transitions between buck and boost modes. It supports selectable PWM or Burst Mode operation, an easily synchronized oscillator, and output disconnect in shutdown. The device also includes an output current monitor, <1μA shutdown current, short-circuit protection, soft-start, current limit, and thermal shutdown. With an input range of 2.7V to 15V and output up to 14V, it can generate 3.3V or 5V from one, two, or three Li-Ion cells, or boost a 12V lead-acid battery to a regulated 12V rail. Technically, the LTC3112 uses a current-mode control architecture with a fixed switching frequency that can be synchronized to an external clock. The 4-switch topology allows the inductor to be connected across the input or output depending on the mode, minimizing voltage stress and improving efficiency across a wide operating range. The output current monitor provides a proportional voltage that can be used for load current measurement or as a feedback signal for current regulation, enabling applications such as LED current regulation. Typical applications include handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and backup capacitor stacks. The wide input range and high output current make it suitable for industrial, automotive, and portable electronics where supply voltages vary. When designing with the LTC3112, pay careful attention to the inductor selection and PCB layout to minimize parasitic inductance and ensure stable operation. The exposed pad must be soldered to a copper plane for adequate thermal dissipation, especially at high output currents. Additionally, the Burst Mode operation can be disabled for applications requiring constant frequency operation to avoid interference with sensitive analog circuits.