Convertidores DC-DC
Productos (770)
LT1976BEFE - 60V 1.5A 200kHz Step-Down Switching Regulator | Analog Devices
The Analog Devices LT1976BEFE is a 200 kHz monolithic step-down (buck) switching regulator that accepts input voltages up to 60V and delivers up to 1.2A of switch current from a 16-lead TSSOP-EP package. It integrates a high-efficiency 1.5A, 0.2 ohm internal power switch along with the oscillator and control logic required for a complete DC-DC converter, using current-mode topology for fast transient response and good loop stability. A buck (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 rapidly switching an inductor and using an LC output filter. Within the broader power management hierarchy, buck regulators sit below isolated converters and above linear regulators (LDOs) in efficiency versus noise trade-off. Buck regulators deliver far higher efficiency than LDOs when VIN is much greater than VOUT, making them the workhorse topology for industrial, automotive, and telecom rails. The LT1976B is the lower-quiescent-current variant of the LT1976 family, drawing only 100 microamps of quiescent current while operating, plus a micropower shutdown mode. It also adds a sync pin for oscillator synchronization to an external clock, while the standard LT1976 lacks the SYNC function. The wide 3.3V to 60V input range accommodates 5V, 12V, 24V, and 48V buses, and the adjustable output covers 1.25V to 54V using an external resistor divider. Current-mode control is used internally, which simplifies loop compensation and provides inherent cycle-by-cycle current limiting on the internal 1.5A switch. The exposed thermal pad (EP) on the TSSOP-16 package reduces junction-to-ambient thermal resistance and is required for proper operation at full load. Typical applications include 24V industrial bus regulation, battery-powered systems, automotive accessory power, distributed 5V and 12V rails, and isolated telecom supply post-regulators. The wide VIN range and 1.5A peak switch current let the LT1976BEFE replace discrete switcher designs with a single IC plus an inductor, catch diode, and a few ceramic bypass capacitors. Compared to linear regulators, it dissipates far less heat when stepping down from 24V or 48V rails. When designing with this part, keep the input capacitor close to the VIN and GND pins, choose an inductor rated for at least 1.5A saturation, and connect the exposed pad to a copper ground plane to meet the rated 0.2 ohm RDS-on at full load. This page synthesizes distributor pricing, drop-in same-package alternatives in the LT1976 family, and practical design notes not found in the manufacturer datasheet alone, helping engineers source, compare, and lay out the LT1976BEFE in one view.
LT3748EMS#PBF - 100V Isolated Flyback Controller | Analog Devices
The Analog Devices LT3748EMS#PBF is a 100V isolated flyback controller for high-power, isolated step-up and step-down DC-DC conversions, operating from 5V to 100V in a 16-MSOP package. It drives a low-side external N-channel power MOSFET from an internally regulated 7V supply and uses boundary-mode operation to support compact magnetics. The controller is designed for isolated flyback topologies and can deliver load power of several tens of watts when paired with a suitable external MOSFET and transformer. A flyback controller is a switching-regulator controller that uses an energy-storage transformer to transfer power across an isolation barrier. The LT3748EMS#PBF belongs to the DC-DC converter and isolated power-supply hierarchy, combining high-voltage input capability, boundary-mode control, and external power-stage design flexibility. Its isolation-capable architecture is useful where the output must be electrically separated from the input source. Key verified features include a 5V to 100V input operating range, a 100V isolated flyback-controller rating, boundary-mode operation, low-side external N-MOSFET drive, internally regulated 7V gate-drive supply, and load regulation of ±5% over the specified line, load, and temperature ranges. The 16-MSOP package supports compact isolated power modules while leaving the MOSFET and transformer selection to the designer. The LT3748 is intended for isolated auxiliary supplies, industrial equipment, telecom power systems, data-acquisition equipment, instrumentation, and high-voltage DC-DC converters. The boundary-mode approach can reduce transformer size while maintaining load regulation, but final efficiency, isolation, voltage accuracy, and thermal performance depend on the external transformer, MOSFET, compensation, layout, and output components. Designers should select an external MOSFET with adequate voltage and current ratings, verify transformer isolation and saturation margins, and keep high-current switching loops compact. The controller’s 100V input capability does not remove the need for surge protection, input filtering, creepage, clearance, and safety validation in the completed isolated converter. This page summarizes verified source information and clearly identifies specifications that require additional data.
LT3753IFE - 100V Active Clamp Forward Controller | Analog Devices
The Analog Devices LT3753IFE is a current-mode PWM controller optimized for active clamp forward converter topologies, operating across an 8.5V to 100V input range and housed in a 38-pin TSSOP-EP (Thermally Enhanced) package. The device integrates a programmable volt-second clamp that permits primary-side switch duty cycles above 50%, which improves transformer, switch, and rectifier utilization efficiency. The IC's active clamp control architecture reduces primary switch voltage stress and recovers transformer leakage energy, while a synchronous output drives secondary-side synchronous rectification MOSFETs for higher system-level efficiency. An active clamp forward controller is a current-mode PWM IC purpose-built for isolated forward converter topologies used in industrial, telecom, and distributed-bus power designs. Active clamp resets the power transformer using an auxiliary MOSFET and capacitor instead of a dissipative snubber or simple reset winding, which boosts efficiency, enables duty cycles above 50%, and lowers primary switch voltage stress. Forward controllers sit within the broader hierarchy: PWM controller -> DC-DC switching controller -> power management IC -> semiconductor. Key features include programmable volt-second clamp, current-mode control with slope compensation, programmable soft-start, an internal 5V LDO for housekeeping, and an internal 100V start-up bias regulator that eliminates external bootstrap components. The synchronous rectifier (SR) timing output simplifies secondary-side synchronous MOSFET control. The 38-TSSOP-EP package exposes a thermal die pad (theta_JA around 30 C/W with proper PCB copper), enabling high-power isolated designs without external heatsinking. Architecture depth: the LT3753 uses peak current-mode control with programmable slope compensation to support both voltage- and current-mode transformers without subharmonic instability. The volt-second clamp circuitry monitors the OUT/transformer reset waveform and terminates the primary switch ON-time when the programmed volt-second product is reached, eliminating duty-cycle dependence on input voltage variations. The internal 5V LDO powers the IC's logic and SR gate drive from the high-voltage INTVCC rail. Typical applications include 24V to 48V isolated telecom bus converters, industrial 24V/48V distributed bus intermediate bus converters (IBCs), isolated bias supplies for gate drivers and analog front-ends, and high-density 48V-input server/ATE point-of-load front ends. Synchronous rectification enables efficiency peaks of 92-95% in well-tuned designs. Design consideration: the active clamp capacitor value is set by the desired transformer reset time and volt-second clamp setting; too-small capacitance causes incomplete reset and transformer saturation, while too-large capacitance slows regulation response. Use the manufacturer datasheet to size the clamp capacitor, primary inductance, and slope compensation resistor for the chosen transformer turns ratio.
LT3758EMSE - 100V Boost/Flyback/SEPIC Controller | ADI
The Analog Devices (formerly Linear Technology) LT3758EMSE is a high-input-voltage current-mode DC/DC controller capable of generating either positive or negative output voltages from a 5.5V to 100V input rail. Housed in a 10-pin MSOP-EP package with exposed pad for improved thermal dissipation, it supports switching frequencies from 100kHz to 1MHz and can be configured as a boost, flyback, SEPIC or inverting converter via the novel FBX pin architecture. A DC/DC controller (also called a switching controller or SMPS controller) is an IC that drives an external power MOSFET or switch to convert one DC voltage to another using high-frequency switching and magnetic components. It sits in the power management hierarchy between a switching regulator (which integrates the power switch) and a fully integrated point-of-load (PoL) module. Unlike a linear regulator, a switching controller achieves high efficiency across wide VIN/VOUT ratios by storing energy in an inductor and releasing it at a different voltage, but requires careful PCB layout and external component selection. Key features of the LT3758EMSE include a 5.5V to 100V input voltage range, programmable operating frequency from 100kHz to 1MHz set by an external resistor, optional external clock synchronization via the SYNC pin, 1µA typical shutdown quiescent current for battery-powered systems, and an internal 7.2V gate driver capable of driving standard N-channel MOSFETs. The novel FBX pin accepts feedback directly from a positive or negative output divider, eliminating the need for level-shifting circuitry in inverting converter topologies. The LT3758EMSE uses current-mode control with a precision internal reference, providing excellent line and load regulation, cycle-by-cycle current limiting, and simple loop compensation. Demonstration circuit DC1342A from Analog Devices showcases the part in a 300kHz flyback converter delivering 3.3V/3A from an 18V to 75V input, validating its suitability for telecom and industrial bus voltage conversion. Typical applications include 24V to 48V telecom bus converters, automotive 12V/24V battery-powered systems, isolated flyback power supplies for industrial sensors, and SEPIC converters for battery charging. The wide VIN range also makes it ideal for distributed power architectures fed from rectified 110V/220V AC lines. When designing with the LT3758EMSE, ensure the input capacitor, power inductor, and current-sense resistor are sized for the worst-case VIN and load transients. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the -40°C to +125°C operating range. This page synthesizes distributor pricing, drop-in alternatives from the same Linear Technology/Analog Devices controller family, and practical design notes that go beyond the manufacturer datasheet to accelerate your evaluation.
LT3782EFE - 2-Phase Step-Up DC/DC Controller | Analog Devices
The Analog Devices LT3782EFE is a current mode 2-phase step-up (boost) DC/DC converter controller with switching frequencies up to 500 kHz, 10 V MOSFET gate drive (at VCC >= 13 V), and 4 A peak gate drive current, housed in a 28-pin TSSOP with exposed pad (FE) package. A boost converter controller is a power management IC that drives external N-channel MOSFETs and inductors to step a lower input voltage up to a higher regulated output. Unlike monolithic regulators, a controller integrates only the PWM control loop, error amplifier, and gate drivers, so the power stage is external and scalable to very high output power. In the hierarchy of power management ICs, the LT3782EFE sits at the top of the power range: switching controller -> switching regulator -> voltage regulator. The LT3782EFE's defining feature is 2-phase interleaved operation: two boost power stages switch 180 degrees out of phase, which cancels input and output ripple currents and reduces required filtering capacitance and inductance. This directly lowers BOM cost, board area, and output ripple. Because phase interleaving doubles effective switching frequency at the terminals, output ripple voltage shrinks for a given capacitor bank. Technically, the LT3782 uses a current mode architecture with a transconductance (gm) error amplifier regulating the output voltage and commanding the PWM current loop. The datasheet block diagram shows PWM logic and flip-flops, two high-speed gate drivers rated for 10 V gate drive and 4 A peak current, and 2-phase control signals capable of driving most industrial-grade high-power MOSFETs with high efficiency. The 10 V gate drive (VCC >= 13 V) fully enhances standard industrial MOSFETs, minimizing RDS(ON) losses at high current. Typical applications include industrial 24 V to 48 V bus step-up supplies, high-power telecom and battery-backup boost converters, and automotive or heavy-equipment power systems where robust 40 V-class input tolerance matters. Design consideration: with 10 V gate drive the controller needs VCC at or above 13 V for full gate swing; at lower VCC consult the datasheet gate-drive curves before selecting MOSFETs. This page adds distributor pricing context, same-family drop-in variants, and practical design notes not found in the manufacturer datasheet.
LT3782EFE#PBF - 2-Phase 500kHz Boost Controller | ADI | 28-TSSOP-EP
The Analog Devices LT3782EFE#PBF is a current-mode, two-phase step-up (boost) DC/DC converter controller housed in a 28-pin TSSOP-EP (HTSSOP) package with exposed thermal pad. It operates from 6V to 40V input, supports switching frequencies up to 500 kHz, and delivers 4 A peak gate-drive current with 10 V gate drive (when Vcc ≥ 13 V), enabling efficient driving of industrial-grade high-power MOSFETs. A boost (step-up) DC/DC controller is a type of switching voltage regulator that produces an output voltage higher than its input voltage by storing energy in an inductor and releasing it into the output capacitor through a power switch. Two-phase interleaved operation, as implemented in the LT3782, runs two boost phases 180° out of phase, which halves the input/output ripple current amplitude and doubles the effective ripple frequency. The result is smaller magnetics, lower EMI, and reduced filter capacitance versus a single-phase equivalent. Within the broader taxonomy: boost controller -> DC/DC switching controller -> power management IC -> semiconductor. Key features include 6 V to 40 V input range (Vcc start-up as low as 6 V with operation down to 4 V after start), adaptive or programmable current-mode control, internal 4 A gate drivers for both top and bottom MOSFETs in each phase, programmable switching frequency up to 500 kHz, and synchronizable to an external clock. The TSSOP-28 EP package offers thermal resistance θJA near 28 °C/W on a standard JEDEC 4-layer board, supporting the high-power dissipation expected of a 2-phase high-current boost stage. The 2-phase architecture also benefits high-current applications because it spreads power dissipation across two inductors and two MOSFET pairs, reducing per-component thermal stress. Synchronous rectification is supported by the bottom-gate driver output on each phase, allowing use of low-Rds(on) N-channel MOSFETs for high-efficiency conversion. Programmable soft-start, current limit, and synchronization round out the feature set. Typical applications include 12 V/24 V to 48 V industrial bus converters, automotive 12 V step-up pre-regulators for audio amplifiers, telecom hold-up converters, and any high-current (>10 A) boost topology where input ripple and EMI must be minimized. The LT3782 is well suited to systems where two single-phase converters would otherwise be paralleled. Designers should size the two inductors with a 180° phase relationship, use low-ESR ceramic or polymer output capacitors, and connect the exposed pad (EP) to a large copper pour to manage MOSFET-driving losses. For very high output currents, sync-MOSFETs and Schottky rectifiers should be selected to minimize conduction loss. This page consolidates distributor pricing, verified drop-in alternatives, and engineering design notes that go beyond the ADI datasheet's typical application section.
LT3782EFE#TRPBF - 2-Phase Boost DC/DC Controller, 500kHz | ADI
The Analog Devices LT3782EFE#TRPBF is a current-mode 2-phase step-up DC/DC converter controller housed in a 28-pin TSSOP-EP (TSSOP-28 with exposed pad) package. Its high switching frequency up to 500 kHz and 2-phase architecture reduce required input/output filtering capacitance and inductance. The device delivers 10 V gate drive (VCC >= 13 V) with 4 A peak gate-drive current to drive industrial-grade high-power MOSFETs efficiently. Operating input range covers 6 V to 40 V, making the controller suited to 12 V, 24 V, and 40 V industrial bus rails. A two-phase boost controller is a current-mode switching regulator that interleaves two converter phases 180 degrees out of phase. This interleaving halves the input ripple current and doubles the effective switching frequency seen by the input filter, allowing the use of smaller magnetics and capacitors. The controller sits in the broader hierarchy of DC/DC converters -> switching regulators -> power management ICs -> semiconductors, and is the high-power counterpart to single-phase boost controllers when output currents exceed what a single phase can comfortably supply. Key features include programmable switching frequency, selectable two-phase or single-phase operation, synchronizable oscillator, soft-start, and adaptive dead-time control for synchronous MOSFET applications. The 4 A peak gate-drive capability supports high-Ciss MOSFETs without external gate drivers, while the 10 V gate drive is compatible with standard threshold N-channel power MOSFETs. The TSSOP-EP package provides a thermal pad for improved heat dissipation and reliable operation at high switching currents. The 2-phase topology reduces input RMS current by approximately 50% compared with single-phase equivalents at the same load, decreasing input capacitor stress and EMI. Adaptive dead-time control prevents cross-conduction in synchronous rectifier configurations. The internal soft-start and current-mode control simplify loop compensation and enable reliable step-up conversion from wide-input sources to high-output voltages required by industrial, automotive, and telecom systems. Typical applications include high-power LED drivers, industrial 24 V to high-voltage DC bus conversion, automotive audio amplifier supplies, telecom -48V hold-up converters, and high-voltage bias generators for LCD backlights. The wide 6V-40V input tolerates load-dump and transients commonly encountered in industrial and automotive environments. When designing with this device, ensure the exposed pad is soldered to a sufficiently large copper pour for thermal dissipation. Select the inductor and input capacitor based on the desynchronized ripple current of each phase. Use proper PCB layout to minimize switching-node area and reduce EMI.
LT3790EFE - 60V 4-Switch Sync Buck-Boost Controller | ADI
The Analog Devices LT3790EFE is a 60V synchronous 4-switch buck-boost controller that regulates output voltage, output current, or input current with input voltages above, below, or equal to the output voltage, packaged in a 38-lead TSSOP with an exposed thermal pad. It accepts a wide 4.7V to 60V input range, supports an adjustable output of 1.2V to 60V, and delivers up to 10A of output current with up to 98.5% efficiency through its constant-frequency current-mode architecture. A buck-boost controller is a DC-DC switching converter topology that uses a single inductor and four switches to step the input voltage up or down (or pass it through) while maintaining a regulated output. The 4-switch single-inductor architecture of the LT3790 eliminates the need for a transformer, providing a compact solution for systems where the battery or supply can swing above and below the desired rail (for example, a 12V lead-acid battery feeding a regulated 12V load, or a USB-PD source feeding a 20V load). Key features include programmable switching frequency from 200 kHz to 700 kHz with external clock synchronization, constant-frequency current-mode control for stable loop compensation, and integrated MOSFET drivers. Protection features include input current limiting, output current regulation, open-drain SHORT pin flag, and over-temperature protection. Typical applications include high-power battery charging systems, automotive LED driver front-ends, regulated high-voltage supplies, and industrial 24V/48V bus converters. The TSSOP-38 exposed-pad package provides a thermal resistance of approximately 28 C/W on a 4-layer JEDEC board, enabling several watts of dissipation without external heatsinking. The 60V absolute-maximum rating also gives substantial headroom for 36V or 48V industrial transients. Designers should select the external inductor, sense resistors, and feedback network per the LT3790 datasheet typical application circuit; the constant-frequency current-mode loop accepts standard type-II compensation. Use the SHORT pin as a power-good or fault flag in supervisory logic. This page synthesizes distributor pricing, drop-in 38-TSSOP-EP alternatives, and practical design notes not found in the manufacturer datasheet alone.
LT3790EFE#PBF - 60V Sync 4-Switch Buck-Boost Controller | ADI
The Analog Devices LT3790EFE#PBF is a synchronous 4-switch buck-boost voltage/current regulator controller housed in a 38-pin TSSOP with exposed pad (TSSOP-38 EP). It regulates output voltage, output current, or input current with input voltages above, below, or equal to the output voltage, supporting input range of 4.7 V to 60 V and adjustable output of 1.2 V to 60 V with up to 10 A output current capability. A buck-boost converter is a switched-mode DC-DC topology that seamlessly transitions between buck (step-down) and boost (step-up) operation, maintaining a regulated output even when the input voltage crosses the output voltage. Buck-boost controllers sit within the broader hierarchy of DC-DC converters -> switching regulators -> power management ICs -> semiconductors. They are preferred over two-stage cascaded solutions when VIN can dip below or rise above VOUT, eliminating the need for separate boost and buck stages and improving efficiency. Key features of the LT3790 include 4-switch synchronous rectification for high efficiency, constant-frequency current-mode architecture, programmable switching frequency, and a status flag (SHORT) that asserts when the FB pin drops below 400 mV with VSENSE above 5 mV. The wide 4.7 V to 60 V input range supports automotive load-dump transients, 24 V industrial buses, and high-cell-count battery packs. Output disconnect is inherent in the topology, preventing DC current flow when VOUT is shorted to ground. The LT3790 uses peak current-mode control with a precision reference and adaptive shoot-through protection on the four N-channel MOSFET drivers. Its 200 kHz to 700 kHz programmable frequency (200 kHz default) allows designers to trade efficiency versus external inductor and capacitor size. Internal ±2% reference accuracy and cycle-by-cycle current limiting simplify compliance with AEC-Q100 and similar noise/ripple requirements. Typical applications include high-power LED drivers, battery charging systems for 12 V/24 V/48 V packs, USB Power Delivery (PD) and other wide-range input converters, solar charge controllers, and automotive infotainment/lighting rails. The 4-switch topology also makes it suitable for industrial telematics and robotics power where the input bus can vary widely. When designing with the LT3790, select four N-channel MOSFETs with adequate drain-source breakdown for the maximum VIN plus ringing margin, and use a low-ESR ceramic or polymer output capacitor bank sized to meet the dynamic load step requirement. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the -40 C to +125 C operating range. This page synthesizes distributor pricing, same-family and cross-brand drop-in alternatives, and practical PCB/thermal design notes not found in the manufacturer datasheet alone.
LT3790EFE#TRPBF - 60V Sync 4-Switch Buck-Boost Controller | ADI
The Analog Devices LT3790EFE#TRPBF is a synchronous 4-switch buck-boost voltage and current regulator controller housed in a 38-pin TSSOP-EP exposed-pad package. It operates from 4.7V to 60V input, supports output voltages from 1.2V to 60V, and uses constant-frequency current-mode architecture adjustable from 200kHz to 700kHz. The device regulates output voltage, output current, or input current with input voltages above, below, or equal to the output voltage, eliminating top-FET refresh switching noise. A buck-boost controller is a type of DC-DC switching regulator that maintains a regulated output whether the input rail sits above, below, or equal to the output rail. The four-switch (H-bridge) topology combines a synchronous buck and a synchronous boost, transferring seamlessly across all three operating modes. Within the broader power management hierarchy, the LT3790 sits between buck-only or boost-only regulators and full-bridge converters, offering single-IC flexibility for systems with wide VIN variation. Key features include 60V absolute maximum input, 200kHz-700kHz programmable/synchronizable switching frequency, current-mode control with cycle-by-cycle current limiting, adjustable soft-start, input current limiting, output current limiting, and a built-in topology switchover that eliminates the third-quadrant refresh pulse typical of competing solutions. The exposed thermal pad supports high-power dissipation up to several watts, enabling compact industrial designs. The LT3790 uses a proprietary architecture that avoids the top-FET refresh switching common in 4-switch controllers, reducing switching losses and EMI while improving efficiency at light load. The constant-frequency current-mode control simplifies loop compensation and enables parallel operation for higher output current. Typical applications include automotive 12V/24V battery systems, industrial 24V/48V bus converters, battery-powered systems with wide VIN range, solar power conditioning, and high-power LED drivers. The wide input range and 60V absolute maximum also make it suitable for telecom 48V rails. When designing with this device, select MOSFETs with adequate VDS margin (80V or 100V for a 60V system) and use the exposed pad with sufficient copper for thermal dissipation. The efficiency at high VIN depends heavily on MOSFET RDS(ON) and gate charge selection. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing a one-stop engineering reference for LT3790EFE#TRPBF selection.
LT3971EMSE - 38V, 1.2A, 2MHz Buck Regulator | Analog Devices
The Analog Devices LT3971EMSE is an adjustable-frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V and delivers up to 1.2A of output current in a 10-lead MSOP-10 (MSE) package with an exposed pad for low thermal resistance. Key headline parameters: 38V maximum input voltage, 1.2A continuous output current, and 2.8µA quiescent current with Burst Mode operation. The switching frequency is user-programmable from 200kHz to 2MHz, allowing optimization between efficiency and external component size. What is a buck switching regulator? A buck (step-down) switching regulator is a type of DC-DC converter that efficiently reduces a higher input voltage to a lower regulated output voltage by rapidly switching an inductor and using energy storage elements. Within the broader taxonomy, a buck regulator belongs to switching regulators, which are a subset of DC-DC converters, which in turn are a type of voltage regulator under the power management IC umbrella. The LT3971 features Burst Mode operation that consumes only 2.8µA of quiescent current while regulating with no load, making it ideal for always-on applications and battery-powered systems where standby current is critical. The accurate 1V threshold enable pin allows the regulator to be shut down, reducing input supply current to 700nA, which preserves battery life during deep sleep states. A capacitor on the SS pin provides programmable soft-start, controlling inrush current at power-up. A power good flag signals when VOUT reaches 91% of the programmed output voltage, useful for multi-rail sequencing in complex systems. The internal architecture uses a 1.9A peak switch current limit, providing headroom beyond the 1.2A continuous rating for transient loads. The high switching frequency capability (2MHz) allows use of compact inductors and ceramic output capacitors, minimizing the overall solution footprint — particularly valuable in space-constrained portable designs. The MSOP-10 exposed pad package offers a thermal resistance suitable for moderate power dissipation. Typical applications include automotive battery regulation, portable industrial instruments, distributed supply regulation, battery-powered devices, and always-on systems requiring low standby current. The wide 38V input range tolerates load-dump transients and industrial 24V rails. When designing, pay close attention to the inductor selection: choosing a shielded inductor with appropriate saturation current and DC resistance optimizes efficiency. Place input/output ceramic capacitors close to the IC and route the exposed pad directly to a copper pour for thermal management. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
LT3971EMSE#PBF - 38V, 1.2A, 2MHz Buck Regulator | Analog Devices
The Analog Devices LT3971EMSE#PBF is an adjustable-frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V and delivers up to 1.2A of output current in a 10-pin MSOP with exposed pad (MSE) package. It operates with a low quiescent current of only 2.8uA at no load, supporting battery-powered and always-on applications. The switching frequency is user-programmable from 200kHz to 2MHz, allowing optimization between efficiency and external component size. A buck (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 by rapidly switching a power transistor and storing energy in an inductor. Buck regulators occupy the middle tier of the power-management hierarchy: DC-DC converter -> switching regulator -> buck converter -> power management IC. They are preferred over linear regulators in high-ratio step-down applications because they avoid the large (VIN-VOUT) x IOUT power dissipation inherent to LDOs, achieving typical efficiencies of 85-95%. Key features of the LT3971EMSE#PBF include low ripple Burst Mode operation for high efficiency at light loads, an accurate 1V threshold enable pin (with 700nA shutdown current), a soft-start pin for controlled inrush current, and a power-good flag that signals when VOUT reaches 91% of the programmed value. The internal compensation and 1.2A switch current rating simplify design while reducing external BOM count. The 10-pin MSOP exposed pad package provides a low thermal-resistance path, supporting full 1.2A operation in industrial temperature grades (E: 0C to 125C junction, -40C to 125C by design). Typical applications include automotive battery regulation, industrial 24V bus point-of-load conversion, distributed power systems, portable battery-powered equipment, and always-on alarm/keep-alive supplies where the 2.8uA quiescent current is critical. When designing with the LT3971EMSE#PBF, choose the inductor and input/output capacitors based on the programmed switching frequency and load transients; higher switching frequencies permit smaller inductors but trade off switch losses.
LT3971EMSE-3.3 - 38V, 1.2A, 2MHz Buck Regulator | Analog Devices
The Analog Devices LT3971EMSE-3.3#PBF is a 38V, 1.2A, 2MHz monolithic step-down switching regulator with a fixed 3.3V output, packaged in a 10-lead MSOP with exposed thermal pad. It accepts a wide 4.3V to 38V input range, features only 2.8 µA quiescent current, and uses low-ripple Burst Mode operation to maximize efficiency at light loads. A buck (step-down) switching regulator is a DC-DC converter that produces a lower output voltage than its input by rapidly switching an inductor and storing energy in that inductor, then releasing it through a rectifier into an output capacitor. Buck regulators sit within the power management IC hierarchy (buck -> DC-DC converter -> voltage regulator -> power management IC) and are favored over linear regulators for their high efficiency, especially when VIN significantly exceeds VOUT. The LT3971 family is purpose-built for automotive and industrial applications where high input transients and very low standby drain matter. Key features include a programmable switching frequency from 200 kHz to 2 MHz, internal 1.2A switch, 2.8 µA Iq with output regulating at no load, fixed 3.3V or 5V and adjustable versions, internal compensation, and internal boost diode. The 10-lead MSOP-EP package offers a thermal resistance suitable for sustained 1.2A operation when properly footprinted, and the exposed pad must be soldered to a sufficiently large copper pour. Architecturally the LT3971 uses a current-mode control loop with a precision reference and an integrated power switch. The very low IQ allows it to maintain output regulation while drawing only micro-amps from the battery, and Burst Mode operation skips switching cycles at light load to keep efficiency high and output ripple low. Programmable frequency up to 2 MHz enables designers to choose frequencies above the AM band or outside sensitive IF bands, and to use small ceramic capacitors and inductors. Typical applications include automotive battery-powered systems, portable instruments, industrial control loops, and any 12V/24V supply rail that must deliver 3.3V with high efficiency. Its wide input range also makes it ideal for load-dump tolerant designs and battery-powered equipment that must operate down to deeply discharged battery voltages. When designing with this part, ensure the exposed pad is soldered over adequate copper (typically >=1 square inch) to keep junction temperature within ratings. Keep the input capacitor loop short to minimize ringing on the SW node, and choose an inductor with low DCR to preserve efficiency. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone, accelerating component selection.
LT3971EMSE-3.3#PBF - 38V, 1.2A, 2MHz Buck Regulator | Analog Devices
The Analog Devices LT3971EMSE-3.3#PBF is an adjustable-frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V and delivers a fixed 3.3V output at up to 1.2A, housed in a 10-pin MSOP with exposed pad (MSE) package. The device features a 2.8 µA quiescent current, low-ripple Burst Mode operation, and a switching frequency up to 2 MHz, enabling compact designs with small inductors and ceramic capacitors. A buck (step-down) switching regulator is a DC-DC converter that efficiently reduces a higher DC input voltage to a lower DC output voltage by rapidly switching a power transistor and smoothing the resulting pulse train with an LC filter. The LT3971 family occupies the hierarchy: buck regulator → switching regulator → DC-DC converter → power management IC → semiconductor. Compared with linear regulators, buck regulators achieve much higher efficiency at large VIN/VOUT ratios, making them preferred for battery-powered and automotive systems where thermal dissipation is a concern. The LT3971's key features include a 4.3V to 38V input range, integrated power switch, 700 nA shutdown supply current (via an accurate 1V threshold enable pin), programmable soft-start with a capacitor on the SS pin, and a power-good flag that asserts at 91% of the programmed output voltage. The MSE package combines a small 10-pin MSOP outline with an exposed thermal pad for low thermal resistance. Internally, the LT3971 uses a current-mode control topology with Burst Mode operation that allows the regulator to maintain output voltage with only 2.8 µA quiescent current at no load - ideal for always-on battery systems. The high 2 MHz switching capability supports small inductor and capacitor selection, while the 38V absolute maximum input accommodates load-dump and cold-crank transients in 12V automotive rails. Typical applications include automotive battery-powered systems, industrial control supplies, portable instrumentation, distributed supply regulation in 24V industrial buses, and always-on housekeeping rails in IoT nodes. The wide VIN range also suits solar and telecom point-of-load regulation downstream of a higher-voltage bus. When designing, prioritize input bulk capacitance to handle inductor ripple, place the BST capacitor close to the SW and BST pins, and use a low-ESR ceramic output capacitor for ripple performance. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the 125°C limit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT8210IUJ - 100V 4-Switch Sync Buck-Boost DC/DC Controller | ADI
The Analog Devices LT8210IUJ is a 100V synchronous 4-switch buck-boost DC/DC controller with PassThru, supplied in a 40-QFN (6x6 mm) plastic package. It delivers up to 2.5 A average output current with a wide 2.8V–100V input and 1V–100V output range, and supports four operating modes: PassThru, forced continuous, pulse-skipping, and Burst Mode. The 1ku list price starts at $8.87 per the manufacturer page. A buck-boost DC/DC controller is a switch-mode power supply IC that steps the input voltage up or down while maintaining regulation across the transition. It belongs to the hierarchy switching regulator → DC-DC converter → power management IC → semiconductor, and is used whenever VIN may sit above, below, or equal to VOUT (for example, 12V automotive cranking or 24V industrial buses powering 24V, 12V, or 5V loads). Compared with single-topology buck or boost controllers, a 4-switch buck-boost keeps the output in regulation through the entire VIN range with a single magnetic, simplifying EMI and reducing PCB area. Key features of the LT8210IUJ include: 2.8V to 100V input operating range, 1V to 100V adjustable output, 400 kHz default switching frequency, integrated 4-switch synchronous FET drivers, and selectable PassThru that bypasses switching when VIN is close to VOUT to maximize efficiency. The device also provides current-mode control, programmable soft-start, and fault outputs including PG (power good) and FAULT, alongside a robust set of protection features (OCP, OVP, thermal shutdown). Internally, the LT8210IUJ uses a peak current-mode control architecture with four N-channel gate drivers, allowing the part to connect the input, output, and inductor in different topologies depending on mode. In PassThru, both high-side switches are held on so VIN connects directly to VOUT, eliminating switching loss when VIN ≈ VOUT. In Burst Mode, quiescent current drops for sleep/standby, making the part attractive for always-on systems. Typical applications include 24V/48V industrial bus regulation, automotive 12V battery and start-stop rails, redundant telecom hold-up supplies, and wide-range battery-powered equipment. For high-current multiphase designs, the pin-compatible LT8210-1 adds ISHARE for masterless current sharing across paralleled phases. When designing with the LT8210IUJ, observe the 100V absolute-maximum rating and select external MOSFETs and inductors with adequate voltage and saturation margin. Keep the high-current loop tight and follow ADI's reference layout to manage EMI in high-frequency buck-boost operation. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found on a single datasheet page.
LT8301ES5#TRMPBF - 42V No-Opto Isolated Flyback | Analog Devices
The Analog Devices LT8301ES5#TRMPBF is a micropower isolated flyback converter housed in a 5-lead TSOT-23 (ThinSOT) package, integrating a 65V/1.2A DMOS power switch with all high-voltage control circuitry on-chip. The device operates over a 2.7V to 42V input range and delivers up to 6W of isolated output power without requiring an opto-isolator or third winding for regulation. What is a flyback converter? A flyback converter is a switched-mode power supply topology that uses a coupled transformer/inductor to transfer power across an isolation barrier, storing energy during the switch on-time and releasing it during the off-time. Isolated flyback converters are essential when the output must be galvanically isolated from the input for safety or noise reasons, such as in industrial bus-powered sensors, medical patient-isolated rails, or interfaces crossing mains-voltage boundaries. Within the broader power management hierarchy, the LT8301 belongs to DC-DC converters -> isolated switching regulators -> power management ICs. Key features include boundary-mode switching for low primary-side current, internal loop compensation, a single external resistor programming the output voltage, and a quiescent current optimized for always-on applications. The 65V internal DMOS switch supports flyback transformers with high turns ratios, enabling wide VIN-to-VOUT conversion steps from a single stage. The boundary-mode control scheme minimizes switching losses while keeping the transformer core flux balanced. The LT8301 samples the isolated output voltage directly from the primary-side flyback waveform, eliminating the opto-coupler and TL431 reference typically required. This architecture reduces BOM count by four to six components, simplifies PCB layout, and improves long-term reliability by removing the opto-coupler whose CTR (current transfer ratio) drifts with temperature and age. Typical applications include isolated industrial sensor supplies, isolated gate-drive bias for IGBT/MOSFET bridges, isolated RS-485/RS-232 transceiver power, medical patient-isolated rails, and 4-20 mA loop-powered instrumentation. Designers choose the LT8301 when they need a small-footprint isolated rail without the cost, complexity, and reliability concerns of an opto-coupler. Design consideration: select the flyback transformer turns ratio together with the feedback resistor to program the desired VOUT, then verify boundary-mode operation across the full load range. Below minimum load the part enters burst-mode operation, which introduces low-frequency ripple that some noise-sensitive loads may require additional filtering to suppress. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select and source the LT8301ES5#TRMPBF quickly.
LT8316EFE#TRPBF - 560V No-Opto Flyback Controller | Analog Devices
The Analog Devices LT8316EFE#TRPBF is a micropower, high-voltage isolated flyback controller that operates from a wide 18V to 560V input range and eliminates the need for an opto-isolator in the regulation loop. Housed in a thermally enhanced 20-pin TSSOP-EP package with four pins removed for high-voltage spacing, the device samples the output voltage from a third winding on the flyback transformer, simplifying isolated supply designs. Background Knowledge: A flyback controller is a type of switching DC-DC controller that uses a coupled-inductor (transformer) topology to transfer energy from input to output while providing galvanic isolation. The 'no-opto' variant eliminates the traditional optocoupler + TL431 feedback chain by sensing output voltage indirectly through an auxiliary winding, reducing BOM cost, improving reliability (no optocoupler CTR aging), and shrinking PCB area. Within the power management hierarchy, the LT8316 sits in the isolated switching regulator category, between isolated DC-DC converters and general-purpose switching controllers. Key features include 560V maximum input voltage, low 75uA quiescent current at no load, quasi-resonant boundary mode operation for improved load regulation and reduced transformer size, internal 1.6ms soft-start, and a programmable undervoltage lockout (UVLO). The boundary-mode control scheme turns on the external MOSFET when the transformer flux has fully reset, minimizing switching losses and EMI while maintaining high efficiency across load. The TSSOP-EP package provides an exposed thermal pad for improved heat dissipation in continuous high-power designs. The LT8316EFE is engineered using a high-voltage BiCMOS process that integrates a 560V-rated startup regulator on-chip, eliminating the external bias supply typically required by competing controllers. The device drives an external N-channel MOSFET through a totem-pole gate driver, allowing the user to size the MOSFET for their specific output power requirement rather than being constrained by an internal switch rating. Typical applications include isolated telecom secondary-side bias supplies, industrial 24V/48V bus isolated sensors, automotive EV battery management system (BMS) isolated rails, and household smart-meter isolated interfaces. The 560V input rating comfortably covers 380V rectified mains and 400V automotive bus voltages. When designing with the LT8316EFE, transformer design is the most critical step - the third-winding turns ratio and primary inductance must be carefully selected per the datasheet design procedure to maintain regulation. An RCD snubber across the primary winding is strongly recommended to clamp leakage-inductance spikes within the MOSFET Vds rating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT8331IMSE#PBF - 140V 0.5A Boost/SEPIC/Flyback Conv | ADI
The Analog Devices LT8331IMSE#PBF is a current-mode DC/DC converter with an internal 140V, 0.5A power switch, operating from a 4.5V to 100V input rail. It is housed in a 16-lead (12-pin exposed pad) MSOP package with thermal pad for enhanced heat dissipation. The device supports boost, SEPIC, flyback, and inverting topologies from a single feedback pin architecture. A switching converter (also called a DC/DC switching regulator or SMPS - Switch-Mode Power Supply) uses energy storage elements (inductors and capacitors) and a power switch to convert one DC voltage to another DC voltage with much higher efficiency than linear regulators. The LT8331 belongs to the boost/SEPIC/flyback/inverting sub-family of non-isolated/isolated-capable switching regulators, which sits within the broader power management IC category. These topologies are preferred over linear regulators when high step-up ratios, high step-down ratios, or negative rails are required, especially at input voltages above 30V. Key specifications include a programmable switching frequency range of 100 kHz to 500 kHz, 6 uA quiescent current in Burst Mode operation, a SYNC/MODE pin for external clock synchronization or Burst/pulse-skipping selection, and a BIAS pin that allows the IC to be powered from its own output for increased efficiency. The internal current-mode architecture provides stable operation across a wide range of input and output voltages. The LT8331 employs a high-voltage DMOS power switch with current-mode control and internal compensation. The unique single FB pin allows the same IC to be reconfigured for boost, SEPIC, flyback, or inverting configurations simply by changing the external component connections - a significant engineering advantage for multi-rail designs. The 100V max Vin+ tolerance supports 4:1 input range industrial bus systems and automotive load-dump transients. Typical applications include industrial 24V/48V bus converters, automotive power conditioning, isolated flyback bias supplies, negative voltage generators for op-amp and ADC rails, battery-powered systems requiring high step-up ratios, and telecom infrastructure. The wide input range makes it especially attractive for systems that must survive wide input transients. When designing with the LT8331, carefully calculate maximum switch voltage stress in flyback/SEPIC topologies - the 140V internal switch rating provides generous headroom but requires proper snubber design for reliable operation. Use the SYNC pin to synchronize multiple converters in noise-sensitive systems. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT8364EMSE - 60V 4A Boost/SEPIC/Inverting Converter | Analog Devices
The Analog Devices LT8364EMSE is a current-mode DC/DC converter with an integrated 60V, 4A switch, operating from a 2.8V to 60V input. Packaged in a 16-lead (12-pin active) MSOP with an exposed pad (MSE), the device uses a unique single feedback pin architecture that supports boost, SEPIC, and inverting configurations without external components to select topology. Headline parameters include a 60V maximum switch voltage, 4A peak switch current, and 9uA Burst Mode quiescent current for high efficiency at light loads. A boost converter is a switching DC/DC topology that produces an output voltage higher than the input. A SEPIC (Single-Ended Primary Inductor Converter) topology produces a non-inverted output that can be above, below, or equal to the input. An inverting (buck-boost) converter produces an output of opposite polarity to the input. The LT8364 family belongs to the broader category of switching regulators -> DC-DC converters -> voltage regulators -> power management ICs -> semiconductors, integrating the power switch and control loop on-chip to simplify design. Key features include programmable 9uA Burst Mode quiescent current for battery-powered applications, 15mV typical output ripple in Burst Mode operation, an internal 2MHz oscillator (programmable 200kHz to 2MHz via RT pin), and an EN/UVLO pin that serves both as enable and accurate undervoltage lockout threshold. The exposed pad provides low thermal resistance (theta_JE ~ 9C/W on the demo board layout) by soldering to a continuous copper ground plane, enabling reliable operation at high switch currents. Internally, the LT8364 uses a constant-frequency peak current-mode control architecture with a precision reference and internal loop compensation. The single FB pin with its reference set above and below ground enables both positive (boost/SEPIC) and negative (inverting) output voltages from the same silicon, eliminating topology-specific feedback networks. The 60V switch rating supports harsh industrial and automotive input buses, including load-dump and cold-crank transients. Typical applications include industrial 24V/28V bus boost converters to 36V or 48V, automotive ECU supply rails (SEPIC for pre-regulator or inverting for sensor bias), battery-powered portable instruments needing ultra-low 9uA quiescent current, and isolated supply front-ends using a 1:1 transformer in SEPIC topology. The wide VIN range also supports solar MPPT and PoE auxiliary rails. When designing with the LT8364EMSE, prioritize thermal management: the exposed pad MUST be soldered to a continuous copper ground plane under the device, and power-ground components should be tied to the copper exiting near the EN/UVLO and SW pins. Inductor selection (datasheet recommends Coilcraft or equivalent with low DCR) and input/output capacitor ESR directly affect efficiency and ripple. This page synthesizes ADI manufacturer data, real-time distributor pricing, drop-in alternative parts from the LT8364 family, and practical design notes not consolidated on the LT8364 datasheet.
LT8364HMSE#PBF - 60V, 4A Boost/SEPIC/Inverting DC/DC Converter | ADI
The Analog Devices LT8364HMSE#PBF is a current-mode DC/DC switching regulator with an integrated 60V, 4A power switch, packaged in a 12-lead exposed-pad MSOP (MSE) with thermally enhanced top covering over the die. Operating from a wide 2.8V to 60V input, the device delivers a positive fixed or adjustable output of 1.6V to 60V in boost or SEPIC topologies, and supports inverting configurations through its unique single-feedback-pin architecture. Burst Mode operation holds quiescent current as low as 9 µA, preserving efficiency at light loads while keeping typical output ripple below 15 mV. A switching DC/DC converter (switch-mode power supply, SMPS) is a power management integrated circuit that uses a power switch (transistor), energy-storage inductor, and output capacitor to convert one DC voltage level to another with high efficiency - typically 85-95% versus 30-50% for a linear regulator. Within the SMPS taxonomy the LT8364 sits in the non-isolated single-ended family (boost, buck-boost/SEPIC, inverting) rather than the isolated flyback/forward family. Its current-mode control and high-side drive architecture make it well suited to industrial, automotive, and telecom rails where input voltage can vary widely and the converter must tolerate transients without latch-up. Key features include a 2 MHz default switching frequency (programmable from 1.4 MHz to 2 MHz via RT resistor), 60V absolute maximum switch rating, internal 4A peak switch current, low-IQ Burst Mode operation, internal soft-start, thermal shutdown, and an exposed-pad package rated for high dissipation. The single FB pin simplifies compensation and supports positive or negative feedback configurations by component selection. The device uses current-mode control with a 60V N-channel MOSFET switch and a synchronous high-side drive output for external P-MOSFET or PNP pass-element architectures in some configurations. The internal reference is trimmed for accuracy, and the MSOP-12 exposed-pad package provides a low junction-to-ambient thermal resistance suitable for multi-watt dissipation at moderate ambient temperatures. Typical applications include industrial 24V/48V to point-of-load boost converters, automotive 12V battery to higher-voltage rails for sensors and LED drivers, SEPIC supplies for USB-PD and bias rails, inverting converters for op-amp negative supplies, and high-voltage bias generators for IGBT gate drives. When designing with the LT8364, ensure the input bulk capacitor ESR is low enough to handle the 4A switch current pulses without excessive voltage ripple. For SEPIC and inverting topologies a coupled or two-inductor network plus an AC coupling capacitor is required - follow the datasheet reference design BOM for inductor values. Estimated: at VIN = 12V, VOUT = 24V, IOUT = 0.4A (50% duty, 2 MHz), power dissipation is approximately (1 - η) × POUT ≈ 0.48 W assuming 90% efficiency, well within the MSOP-12 EP thermal budget at moderate ambient. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet.
LT8390EFE#PBF - 60V Sync 4-Switch Buck-Boost Controller | ADI
The Analog Devices LT8390EFE#PBF is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input or output current from an input voltage above, below, or equal to the output voltage, housed in a 28-pin TSSOP-EP package. The proprietary peak-buck/peak-boost current mode control scheme allows adjustable and synchronizable 150 kHz to 650 kHz fixed frequency operation, or internal ±15% triangle spread spectrum modulation for EMI mitigation. It operates from a 4 V to 60 V input range and supports outputs up to 60 V at switching frequencies up to 650 kHz. What is a buck-boost DC/DC controller? A buck-boost converter is a switched-mode power supply topology that maintains a regulated output whether the input voltage is above, below, or equal to the output voltage. The "controller" variant drives external MOSFETs rather than integrating them, enabling high-current applications. Buck-boost controllers belong to the broader switching regulator family (SMPS), which sit alongside linear regulators (LDOs) within the power management IC hierarchy. They are essential when battery stacks, automotive transients, or wide industrial rails cross the input/output boundary. Key features include 4 V to 60 V input voltage range, 0 V to 60 V output voltage range, 1.6 A peak gate drive current, ±1.5% reference voltage accuracy, and built-in spread spectrum frequency modulation. The 28-pin TSSOP-EP package includes an exposed thermal pad with a typical theta_JA near 30 C/W for efficient heat extraction in continuous-conduction high-current designs. The device integrates an internal 7.2 V LDO for gate drive supply and supports both input and output current monitoring with a 100 mV full-scale sense threshold. The LT8390EFE#PBF uses Analog Devices' proprietary peak-buck/peak-boost current-mode architecture, which samples the inductor current at the peak of each switching cycle in both buck and boost regions. This eliminates mode-transition transients and supports seamless transitions between buck, buck-boost, and boost regions. The synchronization input accepts an external 150 kHz to 650 kHz clock, while internal spread spectrum reduces peak EMI by up to 15 dB without external components. Typical applications include automotive start-stop systems, USB-PD and industrial battery-powered equipment, solar-powered battery chargers, high-power LED drivers, and regulated 24 V industrial bus converters. The wide 60 V input tolerance makes it especially suited to 12 V/24 V automotive and 48 V mild-hybrid environments with large load-dump transients. When designing with the LT8390EFE#PBF, ensure the CTRL pin is tied above 1.35 V for full-scale current programming, and Kelvin-connect the sense resistor to ISP/ISN pins for accurate current limiting. The exposed pad must be soldered to a continuous ground plane to meet the rated thermal performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT8582IDKD#PBF - Dual 3A DC/DC Converter | Analog Devices
The Analog Devices LT8582IDKD#PBF is a dual-channel PWM DC/DC converter with two independent 3 A switch paths, a 2.5 V to 22 V input range, and a 24-pin WFDFN exposed-pad package. Each channel can be configured as a boost, inverting, SEPIC, Cuk, or flyback converter, with a 42 V maximum switch rating and integrated fault protection. A PWM DC/DC converter is a switching regulator that transfers energy between voltage rails using controlled transistor switching, inductors, capacitors, and feedback loops. The LT8582 belongs to the switching-regulator hierarchy within power-management semiconductors, where it offers greater topology flexibility than a fixed-output converter. Its two independent channels can generate separate positive or negative outputs, making it suitable for dual-rail and bipolar systems. Key features include a power-good signal for event-based sequencing, external-clock synchronization, output short-circuit protection, and a high-gain shutdown input that accepts slowly changing signals. Each channel uses a master switch and a slave switch rated to 42 V. The verified distributor data identifies a maximum switch current of 3.3 A and a 3 A per-channel current capability, while the manufacturer describes tied switches for a 3 A total current limit. The LT8582’s configurable topology allows one device to address boost, inverting, SEPIC, Cuk, and flyback requirements. The power-good output supports system-level sequencing, while fault protection helps guard against input overvoltage and overtemperature conditions. The exposed thermal pad improves heat transfer when the package is properly soldered to PCB copper. Typical applications include industrial negative-rail generation, isolated or nonisolated auxiliary supplies, battery-powered systems, LED backlight drivers, and instrumentation requiring dual-polarity outputs. Because switch-node transitions can create EMI, careful layout, inductor selection, capacitor placement, and thermal-path design remain essential. Designers should begin with the manufacturer’s recommended application circuits and verify switching frequency, compensation, current limit, output ripple, and startup behavior for the selected topology. Confirm exposed-pad soldering and thermal performance against the actual PCB stackup before production. This product page consolidates verified Analog Devices and distributor information with engineering-oriented guidance. It distinguishes tube-packaged LT8582IDKD#PBF from the tape-and-reel LT8582IDKD#TRPBF variant and emphasizes replacement verification rather than treating similar package names as automatic compatibility.
LT8606EDC#TRPBF - 42V 350mA Sync Buck Regulator | Analog Devices
The Analog Devices LT8606EDC#TRPBF is a 42V, 350mA synchronous monolithic step-down switching regulator that consumes only 1.7 µA of non-switching quiescent current, housed in an 8-pin 2 mm x 2 mm DFN exposed-pad (LTC DDC) package. It features a wide 3.0 V to 42 V input range and delivers a fixed/adjustable output down to 1.8 V with 90%+ efficiency. What is a synchronous buck regulator? A buck regulator (step-down switching regulator) is a type of DC-DC converter that reduces a higher DC input voltage to a lower regulated DC output voltage. Synchronous means the high-side switch is paired with a low-side MOSFET that replaces the traditional rectifier diode, which substantially improves efficiency at moderate-to-high load currents. The synchronous buck regulator sits within a hierarchy: DC-DC converter -> switching regulator -> buck (step-down) regulator -> power management IC -> semiconductor. These parts are the workhorses of point-of-load (POL) power conversion in nearly every modern electronic system. Key features include low ripple Burst Mode operation for high efficiency at light loads, a 2 MHz default switching frequency (allowing small inductor and capacitor selection), internal top and bottom switches, and a power-good indicator. The DFN-8 (DDC) variant is optimized for ultra-compact layouts and does not expose the SYNC/TR/SS pins available on the MSOP version of the same die. The LT8606 architecture pairs a peak current-mode controller with integrated 42V-tolerant MOSFETs, achieving fast transient response without complex compensation networks. Its 1.7 µA quiescent current is roughly 10x lower than competing 42V synchronous buck converters, making it ideal for battery-powered systems that must remain alive in standby for years. Typical applications include automotive cold-crank / always-on rails, industrial 24V sensor and actuator supplies, battery-powered IoT and metering devices, and portable instrumentation where small PCB footprint and high efficiency at micro-loads matter most. Design consideration: Use a 4.7 µH to 10 µH inductor with >= 0.5 A saturation current, place input/output ceramic capacitors close to the IC, and exploit the exposed pad as a thermal via field. The DFN version of the LT8606 omits the SYNC/TR/SS pins of the MSOP version; if you need external synchronization or soft-start, select the LT8606EMSE#PBF or LT8606HMSE#PBF. This page synthesizes distributor pricing as of 2026-10-08, pin-compatible drop-in alternatives (LT8606 family), and practical thermal/PCB layout notes not found in the manufacturer datasheet alone.
LT8609AIMSE - 42V, 3A Synchronous Buck Regulator | Analog Devices
The Analog Devices LT8609AIMSE is a 42 V, 3 A synchronous step-down switching regulator with 2.5 µA quiescent current, housed in a 10-lead MSOP package with an exposed pad. It provides adjustable output voltage from 0.782 V upward and integrates high-side and low-side power switches. The LT8609A is optimized for compact, efficient point-of-load conversion where low standby consumption, wide input voltage, and high load current are important. A synchronous buck converter is a switching DC-DC regulator category within power management integrated circuits. Its high-side switch charges an inductor during one switching phase, while its low-side synchronous switch provides a discharge path during the other phase. This topology converts a higher input voltage to a lower regulated output with high efficiency. Compared with a linear regulator, the synchronous architecture reduces dissipation when the input-to-output voltage difference is substantial, making it suitable for battery, industrial, communications, and automotive systems. Key verified features include a 42 V maximum input rating, continuous current capability up to 3 A for the LT8609A family, 2.5 µA quiescent current, and Burst Mode operation that maintains output ripple below 10 mVP-P at low output currents. The family also provides frequency synchronization through a SYNC pin, according to the manufacturer product page and datasheet search result. These characteristics allow the regulator to balance efficiency, transient response, and board area. The LT8609AIMSE is an industrial-temperature ordering option in the LT8609 family, identified by the I temperature grade and MSE package designation. The provided distributor listing identifies a 10-MSOP package with exposed pad, approximately 3.00 mm wide. The exposed thermal pad must be connected to ground and used as a heat-spreading feature when operating at sustained high loads. Electrical details such as switching frequency, output-voltage accuracy, control-loop compensation, and absolute maximum ratings beyond the verified values should be confirmed in the current Analog Devices datasheet. Typical applications include telecom and data-communication equipment, industrial control systems, battery-powered equipment, notebook and tablet power rails, and distributed power systems. A 42 V input rating also allows use in industrial buses when transient and surge requirements are properly addressed. The regulator is most useful where a 3 A load capability and low no-load consumption are required without using a larger power package. When designing around the LT8609AIMSE, select the inductor and input/output capacitors according to the datasheet guidance, keep the switching loop layout compact, and provide adequate copper area around the exposed pad. Verify startup behavior, output ripple, load-transient response, and thermal rise at the highest expected input voltage and load. The main trade-off is switching-regulator output ripple compared with a low-noise linear regulator, so sensitive analog loads may still require post-filtering.