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LT1579CS-5#PBF - 300mA Dual-Input Smart Battery Backup LDO | ADI
The Analog Devices LT1579CS-5#PBF is a dual-input, single-output low-dropout (LDO) linear regulator designed to provide an uninterruptible 5V output from two independent input voltage sources on a priority basis. Housed in a 16-lead SOIC-N (S) package with a fixed 5V output, it supplies up to 300 mA of load current at a typical dropout of 400 mV, draws only 50 µA of quiescent current in operation and drops to 7 µA in shutdown. Two on-chip comparators monitor each input's status while two open-drain status flags (STAT1/STAT2) indicate which source is supplying power and provide early warning of imminent output collapse. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output differential is small — the 'dropout' voltage is the minimum headroom required to keep regulation intact. The LT1579 sits within the broader hierarchy of linear regulators -> voltage regulators -> power management ICs -> semiconductor devices, and the dual-input smart-battery variant targets any system that must remain alive across a primary/backup power handover (USB ↔ Li-Ion, wall adapter ↔ supercap, mains ↔ battery). Key features of the LT1579CS-5#PBF include seamless automatic input switching without glitches, low 50 µA quiescent current (7 µA in shutdown) for battery-life extension, fixed 5V output with ±3% tolerance, integrated reverse-current blocking between the two inputs, and a secondary select pin (S2) that lets designers force a specific input as the priority source. The SOIC-16 narrow-body package provides a manageable footprint while the exposed thermal path supports continuous 300 mA delivery at moderate ambient temperatures. Architecturally the LT1579 combines a precision bandgap reference, two PNP-style pass elements arranged in a diode-OR topology, integrated MOSFET switch control, and the dual-comparator supervisor block. This integrated approach eliminates the discrete FETs, Schottky diodes, supervisor ICs, and sequencer glue logic that a discrete dual-rail ORing solution would otherwise require, reducing both PCB area and BOM cost. Typical applications include battery backup for SRAM/real-time-clock supplies in meters and data loggers, USB/AC-wall-adapter power handover in portable instrumentation, supercap-backed ride-through for PLC and industrial controllers, uninterruptible supplies for microcontrollers and security sensors, and load-sharing between solar harvest and battery in remote telemetry nodes. When designing with the LT1579CS-5#PBF, observe the 400 mV dropout rating and select input capacitance (≥10 µF low-ESR) and output capacitance (≥10 µF low-ESR, no minimum ESR window required) per the datasheet to guarantee stability across the full 0 to 300 mA load range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LT1680CN - 60V Boost DC/DC Controller, 16-PDIP | Analog Devices
The Analog Devices LT1680CN is a high-power, current-mode switching power supply controller optimized for boost (step-up) topologies, housed in a 16-pin PDIP through-hole package. It drives an external N-channel MOSFET switch, supports input voltages from 4V to 60V, and switches at a maximum frequency of 200 kHz with a 90% maximum duty cycle. The high-current gate driver can handle up to 10,000 pF of MOSFET gate capacitance, enabling very high power DC/DC converter designs. A switching controller IC (often called a PWM controller or DC-DC controller) is the brain of an external-MOSFET switched-mode power supply. Unlike a fully integrated switching regulator that contains the power switch on-die, a controller relies on an external MOSFET (or GaN/IGBT) to handle the actual current. This split lets the designer pick the switch technology for a target current/voltage, while the controller IC provides the regulation loop, gate drive, current sensing, and protection. The LT1680 sits in the linear regulator / voltage regulator / power management IC hierarchy under Analog Devices' Power Management portfolio. The LT1680CN's headline features are: 60V input operation, fixed-frequency current-mode control, 10,000 pF gate-drive capability, programmable average current limiting, and a 5V reference output capable of sourcing 10 mA externally. Current-sense common-mode range extends to 60V, so the part can directly sense current in a high-side N-MOSFET boost converter without level-shifting tricks. These specs make it one of the few controller ICs in this package class that can drive high-voltage, high-current boost stages directly. Architecturally, the LT1680 uses a current-mode PWM core with a high-side or low-side current sense, a 5V internal reference, an internal oscillator, and a high-current gate driver. The current-mode control provides inherent cycle-by-cycle current limiting and simplifies feedback compensation by treating the inductor as a current source. The high-voltage input tolerance is achieved with a robust high-V process and on-chip ESD structures rated for the full 60V input. Typical applications include automotive 12V-to-24V/48V boost converters, telecom -48V distribution, industrial 24V step-up supplies, and high-power battery charging. The wide 4V-60V input range makes it compatible with nominal 12V, 24V, 36V, and 48V buses after transient headroom. The 5V/10mA reference can bias housekeeping circuits in the same converter. When designing with this part, keep the gate-drive loop short: the LT1680 can charge 10,000 pF quickly, and any trace inductance between the GATE pin and the MOSFET gate will ring. Use a local gate resistor (10-47 ohm) to damp the loop, and place input ceramic bypass as close to the VIN pin as possible. Estimated: at 200 kHz with 10 nF effective gate capacitance, gate-drive losses alone can reach ~20 mW per MOSFET, so thermal management of the MOSFET (not the controller) is usually the design-limiting factor. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB/thermal design notes not collated in the manufacturer datasheet alone.
LT1761ES5-3.3 - 100mA, 3.3V LDO Micropower Regulator | Analog Devices
The Analog Devices LT1761ES5-3.3 is a fixed 3.3V output, 100 mA micropower low-dropout (LDO) linear regulator in a 5-pin TSOT-23 (S5) package. It accepts input voltages up to 20V, exhibits a low 300 mV dropout at full 100 mA load, and features 20 µV RMS output noise when used with an external 0.01 µF bypass capacitor. Quiescent current is rated at 20 µA typical, dropping below 0.1 µA in shutdown, making it ideal for battery-powered systems. An LDO (Low-Dropout) linear regulator is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage is only marginally higher than the output. Within the broader hierarchy, an LDO is a subcategory of linear regulators, which themselves are a subcategory of voltage regulators, themselves part of the power management integrated circuit (PMIC) family. LDOs are favored in noise-sensitive applications because they do not introduce switching ripple into the output rail, unlike DC-DC converters. Key features of the LT1761ES5-3.3 include a wide 1.8 V to 20 V input range, ±1% output voltage accuracy (over line, load, and temperature), internal protection circuitry (reverse-battery, reverse-current, current limit, and thermal shutdown), and a logic-controlled SHDN pin. With a 0.01 µF bypass capacitor on the BYP pin, output spectral noise density falls to under 20 µV RMS across the 10 Hz to 100 kHz audio band, which is significant for handheld instrumentation. The LT1761 architecture uses a PNP pass transistor that allows the regulator to operate with very low dropout and to handle input voltages well above the output. Internal protection includes constant-current current limiting, safe-area protection for the pass element, and thermal shutdown that engages at approximately 145°C junction temperature. The device is stable with small ceramic output capacitors (1 µF or larger), simplifying PCB layout in space-constrained designs. Typical applications include battery-powered handheld instruments, wireless sensor nodes, cellular phone power management, and post-regulation after a switching converter. Its low quiescent current and low noise make it especially well suited for single-cell Li-Ion and two-cell AA/AAA battery stacks where efficiency at light load is critical. When designing with the LT1761ES5-3.3, place the 0.01 µF BYP bypass capacitor as close as possible to the BYP pin to realize the specified 20 µV RMS noise performance. Use a low-ESR ceramic output capacitor of at least 1 µF (X5R or X7R) for output stability. Do not leave the SHDN pin floating; tie it to IN or drive it with a logic signal. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not aggregated in any single manufacturer datasheet, helping engineers evaluate the LT1761ES5-3.3 for both new designs and legacy replacements.
LT1763CS8-3.3#TRPBF - 3.3V 500mA Low-Noise LDO | Analog Devices
The Analog Devices LT1763CS8-3.3#TRPBF is a fixed 3.3V, 500mA low-dropout linear regulator in an 8-lead SOIC package, with low-noise and micropower characteristics for sensitive battery-powered and signal-chain applications. It is designed to supply stable positive output current up to 500mA and is identified by the verified distributor and manufacturer data as an LT1763-family part. An LDO is a linear regulator that maintains a relatively stable output voltage while dissipating power as the difference between input and output voltage multiplied by load current. Compared with a switching regulator, an LDO generally offers simpler control and lower switching-related noise, making the LT1763 suitable for RF systems, battery-powered equipment, low-noise analog supplies, and communication circuits. The LT1763 family also includes fixed outputs from 1.5V through 5V and an adjustable version with a 1.22V reference voltage. Key verified features include a 500mA output-current capability, a 300mV dropout voltage, and low 30uA quiescent current. The 3.3V fixed-output suffix identifies the target rail, while the CS8 package designation identifies the 8-lead SOIC form used by the distributor listings. The low quiescent current is particularly useful when the regulator is expected to consume little power during unloaded or lightly loaded battery operation. The LT1763 series is described by the manufacturer as a micropower, low-noise, low-dropout regulator family. Its architecture is intended to provide regulation close to the load, which can help reduce supply perturbations in RF and precision analog systems. The family data identifies 8-lead SO and 12-lead DFN package options, while this particular orderable MPN is listed in 8-SO packaging. Typical uses include RF systems, battery-powered products, communications equipment, sensor interfaces, and analog signal-conditioning circuits requiring a 3.3V rail. When selecting the device, verify the complete manufacturer electrical characteristics, including input-voltage limits, output accuracy, noise, stability, current limit, thermal behavior, and capacitor requirements. The verified web data provides the principal identity, output voltage, current rating, package family, dropout, and quiescent-current facts; additional detailed limits are marked where not supplied. For implementation, place the regulator close to the load and follow the manufacturer datasheet recommendations for input and output capacitors, layout, and thermal management. The low 30uA quiescent current is a useful advantage in portable systems, but the final power budget must include regulator dissipation and load-dependent behavior. This page combines verified manufacturer and distributor information with application guidance and identifies where additional datasheet values are needed.
LT1790BCS6-5 - 5V Micropower SOT-23 Voltage Reference | Analog Devices
The Analog Devices LT1790BCS6-5 is a fixed 5V output, micropower low-dropout (LDO) series voltage reference in a 6-pin TSOT-23 (S6) package. The 'B' grade delivers ±0.1% initial output accuracy with a low temperature coefficient of 25 ppm/°C and an output current capability of up to 5 mA, making it one of the most accurate small-package references in the LT1790 family. A voltage reference IC is a precision circuit that produces a stable, temperature-independent DC voltage used as a calibration anchor for ADCs, DACs, power-supply monitors, and sensor signal-conditioning paths. Within the power-management hierarchy, references sit alongside voltage regulators and supervisors, providing the absolute voltage standard against which other rails are measured. The LT1790 family combines a buried-Zener or bandgap-style core with curvature compensation and trimmed precision thin-film resistors to deliver low drift, low noise, and very low quiescent current in a footprint compatible with portable and space-constrained designs. Key features of the LT1790BCS6-5 include a low dropout voltage suitable for low-headroom rails, a supply current typically under 60 µA, low output noise, and reverse-battery protection. The 'B' grade's 25 ppm/°C drift makes it well suited to instrumentation that must hold calibration across temperature swings without an external chopper amplifier. Because each part is post-package trimmed, the as-shipped accuracy specification is guaranteed without user adjustment, simplifying factory calibration steps in high-volume builds. Typical applications include precision ADC and DAC reference rails, industrial process-control signal chains, battery-powered instrumentation, automotive sensor modules, and portable medical devices. Designers also use the LT1790BCS6-5 as a stable bias source for precision current loops and as a low-cost upgrade for legacy 5V reference designs that need tighter initial accuracy and better long-term stability. A key design consideration is output-capacitor selection. The TSOT-23 part requires careful bypassing close to the output pin to maintain phase margin, and the load current must remain inside the 5 mA envelope to preserve regulation and temperature performance. A short, low-ESR trace from the reference to the load pin reduces dynamic error when the load is an ADC reference input. This page synthesizes verified distributor pricing, pin-compatible SOT-23 reference alternatives, and application-specific design guidance not present in the standalone Analog Devices datasheet.
LT1910ES8 - 48V High-Side N-FET Driver, 8-SO | Analog Devices
The Analog Devices LT1910ES8 is a protected high-side N-channel MOSFET gate driver in an 8-pin SOIC (S8) package with an integrated charge pump, programmable current limit, short-circuit protection, automatic restart timer, and open-collector fault flag. It operates from an 8 V to 48 V supply and tolerates load-dump transients up to 60 V, allowing the use of low-cost N-channel MOSFETs in high-side switching topologies. The internal charge pump delivers the gate voltage needed to fully enhance the external N-FET without external components. A high-side gate driver is a semiconductor circuit that level-shifts a low-side logic control signal to drive the gate of an N-channel MOSFET placed on the high side of a load, between the supply rail and the load. The category hierarchy is gate driver -> power management IC -> semiconductor. By using an N-channel MOSFET on the high side, designers achieve lower R_DS(on) and lower cost than an equivalent P-channel MOSFET. The LT1910ES8 belongs to this gate-driver product family, with the broader function of switching and protecting DC loads in automotive, industrial, and telecom systems. Key features include an on-chip drain-current comparator that turns off the switch if load current exceeds a preset threshold, programmable delay and autorestart timing set by an external RC network, and a FAULT pin that asserts when the part enters protection. The internal charge pump maintains V_GS above the MOSFET threshold even at 100% duty cycle. Supply current is typically under 4 mA in normal switching and falls to a low microamp level in fault/shutdown. The architecture combines a 48 V-rated DMOS charge-pump switcher, a precision sense comparator, and timing logic in a monolithic die. The integrated design eliminates the external boost capacitor and gate-drive resistor network that discrete high-side drivers require, simplifying PCB layout and reducing BOM cost by typically 4-6 components. Typical applications include automotive load switching (lamps, solenoids, motors), industrial 24 V-48 V control, hot-swap / inrush limiting on plug-in cards, and battery protection in UPS and telecom -48 V systems. The device is especially suited to 12 V and 24 V automotive environments where inductive load transients and reverse-battery events are routine. When designing with this part, place the SENSE resistor between SENSE and VIN using a low-inductance layout, and keep the RG/RT timing network close to the TIMER pin. The FAULT output is open-collector and requires a pull-up resistor to logic supply. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the LT1910ES8 that are not found in the standalone manufacturer datasheet.
LT1931AIS5#TRPBF - 2.2MHz Inverting 1A DC/DC Converter | ADI
The Analog Devices LT1931AIS5#TRPBF is a 2.2 MHz current-mode inverting DC/DC converter in a ThinSOT-23-5 (TSOT-23-5) package with integrated 1 A switch, designed to generate negative output voltages from a positive input rail. It delivers up to -34 V output at 1 A switch current from a 2.45 V to 16 V input range, with very low output ripple of 1 mV P-P at -5 V / 150 mA from a 5 V input. A DC/DC switching regulator (also called a switch-mode converter or SMPS) is an electronic circuit that uses energy storage elements (inductors, capacitors) and high-frequency switching to convert one DC voltage to another with high efficiency (typically 85-95%) versus a linear regulator. The inverting topology (often implemented as a Cuk or buck-boost variant) flips the polarity of the input voltage - so a +5 V input becomes -5 V at the output - using a single inductor and coupling capacitor. Inverting converters sit in the power management IC hierarchy alongside buck, boost, and SEPIC converters, all feeding downstream analog and mixed-signal systems. Key features include 2.2 MHz fixed-frequency operation (A suffix), 1 A integrated power switch, wide 2.45 V to 16 V input range, low output ripple, and the ability to use tiny surface-mount components 2 mm or less in height. The ThinSOT-23-5 footprint enables compact designs while the 2.2 MHz switching frequency keeps the converter above the AM broadcast band and outside common 455 kHz IF stages, simplifying EMI filtering. Technically, the LT1931A uses constant-frequency current-mode control for clean loop compensation and fast transient behavior. The high-side 1 A switch supports high peak inductor currents needed to deliver hundreds of mA at voltages from -5 V down to -34 V. Compared to charge-pump negative regulators, the LT1931A delivers much higher output current and supports higher power levels without the source-current spikes that couple back into the input rail. Typical applications include negative bias supplies for op-amps and LCD panels, portable instrumentation, GaN and SiC gate-driver negative rails, automotive sensor interfaces, and industrial analog front-ends. The wide input range also makes it suitable for 12 V bus systems and battery-powered equipment where a small, hot-rail-tolerant negative rail is required. When designing with the LT1931A, select a Schottky catch diode with low reverse leakage and adequate voltage margin (30 V or more for high-Vout designs), and use ceramic input/output capacitors rated for the peak currents seen in Cuk topology. The exposed backside thermal pad of the ThinSOT helps dissipate the 1 A switch losses, but the small footprint limits continuous output to a few hundred mA without airflow. This page consolidates distributor pricing (DigiKey, Mouser, LCSC), verified same-family drop-in alternatives (LT1931AIS5#TRMPBF, LT1931AES5#TRPBF), and practical design notes not found in the standalone datasheet.
LT1933HDCB - 600mA, 36V Buck Regulator | Analog Devices
The Analog Devices LT1933HDCB is a 600 mA, 500 kHz constant-frequency current-mode PWM step-down DC/DC converter with an internal 750 mA power switch, packaged in a 6-lead DFN (2 mm x 3 mm) with an exposed thermal pad. It accepts a wide 3.6 V to 36 V input range, delivers an adjustable output as low as 1.245 V, and runs at a fixed 500 kHz switching frequency that allows small inductor and ceramic-capacitor designs. According to the ADI datasheet, the part uses current-mode control for excellent line and load transient response and includes internal frequency compensation that simplifies loop design. A buck converter (step-down switching regulator) is a type of DC-DC converter that uses an internal power switch, an inductor, and a rectifying element to convert a higher DC input voltage to a lower DC output voltage at high efficiency. Buck regulators sit within the broader hierarchy of switched-mode power supplies (SMPS) and power management ICs, and they are preferred over linear regulators whenever the input-to-output voltage differential or load current would otherwise waste significant power as heat. The LT1933 family targets space-constrained applications that still require wide input range and high efficiency. Key features of the LT1933HDCB include a 36 V maximum input voltage, 600 mA continuous output current capability, 500 kHz fixed switching frequency, internal 750 mA power switch, internal current sensing, and a low shutdown current of less than 2 uA. The exposed-pad DFN package provides low thermal resistance so the device can deliver full output current across the -40 C to +125 C operating junction temperature range without an external heatsink in typical conditions. The device uses a constant-frequency current-mode architecture with slope compensation, an internal soft-start to limit inrush current, and an exposed thermal pad that acts as the electrical ground. Efficiency typically reaches 80-90 percent at moderate loads, and the high switching frequency allows the use of small ceramic input and output capacitors. The combination of wide VIN range and high switching frequency makes it well suited to battery-powered, industrial, and automotive-supplied loads. Typical applications include 12 V and 24 V industrial bus power conversion, distributed 5 V and 3.3 V rails for sensors and microcontrollers, battery-powered portable equipment, automotive infotainment and accessory power, and point-of-load regulation after a front-end switching converter. The wide VIN tolerance lets the same design survive cold-crank and load-dump transients on automotive supplies. When designing with the LT1933HDCB, follow the datasheet's recommended inductor and capacitor values to ensure stability and acceptable output ripple. Place the input capacitor as close as possible to the VIN and GND pins to minimize switching noise, and use sufficient copper area or thermal vias under the exposed pad to keep the junction temperature within the derating curve. This page synthesizes distributor pricing, drop-in alternative candidates from the same Analog Devices family, and practical design considerations not found in the manufacturer datasheet alone.
LT1933IDCB - 600mA 500kHz Step-Down Regulator | Analog Devices
The Analog Devices LT1933IDCB is a 600 mA, 500 kHz step-down switching regulator with a 3.6 V to 36 V input range, adjustable positive output referenced to 1.245 V, and a 6-lead WFDFN exposed-pad package. It is designed for compact power conversion where low profile, wide input range, and efficient current-mode PWM regulation are important. A step-down DC/DC converter, also called a buck converter, reduces a higher input voltage to a regulated lower voltage using an internal switching element, inductor, capacitor, and control loop. The LT1933 belongs to the switching-regulator family within the broader DC/DC converter and power-management semiconductor hierarchy. Its current-mode PWM architecture provides a practical solution for generating local rails from automotive, industrial, or distributed power systems. The LT1933 uses an internal 0.75 A power switch and is specified for a 600 mA output configuration. Its 500 kHz switching frequency supports a compact implementation with external passive components. The 6-lead DFN package reduces board area, while the exposed pad provides a thermal connection when copper area and heat dissipation are adequate. The adjustable output allows the design to select the required feedback divider rather than using a fixed-voltage version. The verified distributor data identifies the part as a positive adjustable buck regulator with a 1.245 V reference and a 600 mA output rating. The manufacturer search result describes the LT1933 family as a current-mode PWM step-down converter with an internal 0.75 A switch and a wide 3.6 V to 36 V input range. Additional electrical values, including efficiency curves, switching specifications, current-limit behavior, thermal resistance, and inductor recommendations, should be confirmed in the manufacturer datasheet before production release. Typical applications include point-of-load regulation, industrial control systems, automotive electronics, battery-powered equipment, and portable electronics. In these systems, the converter can create a lower, stable rail for sensors, communications circuitry, analog sections, or embedded controllers. Because a switching regulator introduces ripple and switching-node energy, layout and component selection are as important as the nominal voltage and current ratings. Use the exposed pad as a thermal and electrical connection according to the package land pattern, and keep the switching node compact and away from sensitive signal paths. Verify the maximum input voltage, duty-cycle limits, output-voltage accuracy, current-limit behavior, and capacitor ratings in the official datasheet. This page combines distributor data, manufacturer information, and practical design guidance for engineers evaluating a compact 600 mA buck regulator.
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.
LT3010EMS8E - 50mA, 80V LDO Linear Regulator | Analog Devices
The Analog Devices LT3010EMS8E (formerly Linear Technology) is a high-voltage, micropower low-dropout linear regulator capable of supplying 50 mA output current at output voltages adjustable from 1.275 V to 60 V, housed in an 8-lead MSOP package with an exposed pad for enhanced thermal performance. The device operates over a wide 3 V to 80 V input voltage range and delivers a low dropout voltage of approximately 300 mV at 50 mA, making it well suited for harsh 12 V, 24 V, and 48 V industrial supply rails. A low-dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. Within the broader power management IC hierarchy, LDOs sit alongside switching converters and supervisors; unlike switching regulators, they introduce no switching noise but dissipate the voltage difference as heat, making them ideal for noise-sensitive analog and RF loads. The LT3010 belongs to the micropower LDO subcategory defined by very low quiescent current (typically 30 µA at no load), enabling long battery life in always-on systems. Key features include 50 mA continuous output current, 30 µA quiescent current, 60 V maximum adjustable output, 80 V maximum input, reverse-input and reverse-output protection, thermal limiting with hysteresis, and a shutdown pin that drops quiescent current to approximately 1 µA. The exposed-pad MSOP-8 package provides a low thermal resistance of approximately 40 °C/W (depending on PCB layout), supporting reliable operation at elevated ambient temperatures. The regulator uses a PNP pass architecture with a precision bandgap reference. This topology enables the wide VIN range and low dropout while keeping ground pin current low and relatively constant over load, an improvement over older NPN regulator designs. A single external resistor divider sets the adjustable output, and the SHDN pin allows logic-level on/off control for power sequencing. Typical applications include industrial 24 V sensor supplies, automotive battery-fed loads, factory automation modules, bias supplies for op-amps and references, and post-regulation following switching converters where clean, low-noise rails are required. When designing with the LT3010, ensure sufficient PCB copper area under the exposed pad to manage thermal dissipation; at 50 mA and a large VIN–VOUT differential, power dissipation can exceed 2 W. Always include the recommended input/output capacitors and verify stability with the manufacturer-recommended ESR range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single decision-ready reference for the LT3010EMS8E.
LT3045HMSE#PBF - 500mA Ultra-Low Noise LDO | Analog Devices
The Analog Devices LT3045HMSE#PBF is a high-performance low dropout linear regulator delivering 500mA output current with an ultralow 0.8 uVrms noise floor and 76 dB PSRR at 1 kHz, packaged in a 12-pin MSOP-EP (exposed pad). It operates from a wide input voltage range of 1.8 V to 20 V and supports an adjustable output from 0 V to 15 V via external resistors, while internal architecture uses a precision current reference followed by a unity-gain voltage buffer. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. In the system hierarchy, an LDO is a subset of linear regulators, which are themselves a category of voltage regulators within the broader power management IC family. The LT3045 belongs to the ultra-low-noise category designed for noise-sensitive analog/RF loads that cannot tolerate the ripple typical of switching regulators. Key features include a 260 mV typical dropout voltage at full 500 mA load, 2.2 mA quiescent current that drops to sub-1 µA in shutdown, programmable current limit, and a power-good indicator. The exposed-pad MSOP-12 package achieves a thermal resistance of approximately 33 °C/W, supporting sustained 500 mA operation without external heatsinking at moderate VIN-VOUT differentials. The LT3045 is architected as a precision current reference with a unity-gain amplifier on the output. This unique topology delivers constant output noise, PSRR, bandwidth, and load regulation independent of the programmed output voltage - a key advantage over conventional series-pass LDOs whose noise and bandwidth scale with VOUT. Typical applications include RF PLL/VCO power supplies, high-speed data converter references, precision instrumentation front-ends, medical imaging, and post-regulation after switching converters. Designers favor the LT3045 wherever sub-1 µVrms noise is required without the switching artifacts of a buck regulator. When designing with the LT3045, treat the exposed pad as the primary thermal path and provide at least 1 cm² of copper pour to keep junction temperature below 125 °C. Use a minimum 10 µF X7R input/output capacitor to maintain stability and PSRR; ESR must stay below 50 mΩ. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical thermal/PCB design notes not found in the standalone Analog Devices datasheet, helping engineers shorten the BOM selection and PCB bring-up cycle.
LT3045HMSE#TRPBF - 20V 500mA Ultra-Low-Noise LDO | Analog Devices
The Analog Devices LT3045HMSE#TRPBF is a positive adjustable, low-dropout linear regulator rated for 500mA output current, a 20V input range, and ultralow-noise, ultrahigh-PSRR operation in a 12-MSOP exposed-pad package. It is designed for noise-sensitive analog, RF, instrumentation, and precision power-supply applications where a switching regulator is undesirable. A low-dropout regulator, or LDO, is a linear voltage regulator that maintains a stable output while operating with relatively little voltage difference between input and output. The LDO category belongs to the broader voltage-regulator and power-management-IC hierarchy. Unlike a switching converter, an LDO does not add switching-frequency magnetic or conduction noise to the signal path, although power dissipation rises as the difference between input and output voltage times load current increases. The LT3045 uses Linear Technology’s precision current-reference and high-performance voltage-buffer architecture. According to the Analog Devices product page, it combines ultralow output noise with ultrahigh power-supply rejection ratio. The adjustable output supports flexible laboratory and industrial rail generation, while the 500mA current capability covers moderate analog loads. The exposed thermal pad improves heat transfer from the 12-MSOP-EP package when higher dissipation is unavoidable. The LT3045 is especially useful when a noisy upstream switching converter already supplies the raw power but a downstream circuit requires a substantially cleaner rail. Its low-noise behavior makes it appropriate for RF and analog front ends, low-level measurement systems, audio and instrumentation circuitry, and reference or bias networks. The 20V input rating also permits operation above conventional low-voltage rails when regulator headroom is available. Because this device is a linear regulator, designers must verify input-to-output headroom at the maximum expected load. At VIN = 20V and VOUT = 5V, a 500mA load produces an estimated 7.5W dissipation before considering margin; use the exposed pad, adequate copper, and thermal analysis. Input and output capacitors should follow the manufacturer’s recommended network and be placed close to their pins. This page consolidates the verified distributor identity, availability and pricing data, package information, technical use cases, and practical thermal guidance. It is intended to help engineers identify the correct LT3045 ordering code and determine whether its low-noise architecture suits a specific power rail without adding unverified competitor specifications.
LT3045HMSE#Z-EP - 500mA 20V Ultra-Low Noise LDO | ADI
The Analog Devices LT3045HMSE#Z-EP is a 500 mA, 20 V input ultra-low-noise, ultra-high-PSRR LDO linear regulator housed in a 12-lead thermally-enhanced MSOP-EP (MSE) package, qualified to the Enhanced Product (EP) standard for defense and aerospace AQEC applications. It delivers an adjustable output from 0 V to 15 V with a typical dropout of 260 mV at full load. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. Within the broader system hierarchy, the LT3045HMSE#Z-EP sits as LDO -> linear regulator -> voltage regulator -> power management IC -> semiconductor. Unlike switching regulators, LDOs trade efficiency for the absence of switching ripple, making them the preferred post-regulator for noise-sensitive analog blocks. Key features include 0.8 uVrms output noise (10 Hz to 100 kHz), 75 dB PSRR at 1 MHz, and 2.2 mA quiescent current. The part also integrates reverse-battery protection, reverse-current protection, internal current limit with foldback, and thermal limit with hysteresis. The exposed pad MSOP-12 keeps theta_JA low for reliable operation at elevated ambient temperatures in ruggedized environments. Architecturally, the LT3045 uses a precision current-source reference followed by a high-gain unity-gain output stage, producing noise performance that is essentially independent of output voltage and load current. Its wideband PSRR allows the part to clean up switching-converter residuals in multi-rail systems, eliminating the need for additional LC filters. Typical applications include RF and microwave power rails, military/aerospace avionics, precision data-converter power supplies, and post-regulation for switching converters. The 0 V minimum output enables biasing of negative-rail op-amps or biased negative references when combined with an external charge pump. When designing with the LT3045HMSE#Z-EP, ensure the exposed pad is soldered to at least 1 sq-in of copper to keep junction temperature in range, and place the 10 uF minimum ceramic output capacitor directly at the OUT pins. The -EP suffix designates Enhanced Product flow for AQEC and defense applications; for industrial/consumer designs, use the standard LT3045HMSE#PBF part number. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
LT3080ET - 1.1A Adjustable Single-Resistor LDO Regulator | Analog Devices
The Analog Devices LT3080ET is a 1.1 A adjustable low-dropout (LDO) linear regulator with an output voltage range of 0 V to 36 V, housed in a 5-pin TO-220 (T) through-hole power package with tab. It uses a single external resistor to set the output, eliminating the need for external trace resistors and enabling direct paralleling of multiple devices for higher current or better heat spreading on a board. An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally higher than the output. LDOs belong to the linear regulator family, which sits under the broader power management IC category and is one of the two dominant approaches to DC voltage regulation (the other being switching converters). Compared with switching regulators, LDOs add no high-frequency switching noise to the output, making them ideal for noise-sensitive analog and RF rails, at the cost of lower efficiency when VIN - VOUT is large. Key features of the LT3080ET include a wide 1.3 V to 36 V input operating range (with the published maximum at 36 V), 1.2 V typical dropout at 1.1 A, an internal current source architecture that supports output down to 0 V, and a Kelvin-programmable output that is independent of PCB trace resistance. The 5-pin TO-220-5 package exposes the die tab for a low thermal resistance of about 30 C/W when properly heatsunk, allowing the part to dissipate several watts in continuous operation. The LT3080 uses a precision current-source reference and a unity-gain voltage follower topology, so the output is set by the value of a single resistor from the SET pin to ground. This architecture permits multiple LT3080 chips to be paralleled directly without ballast resistors or PCB-trim components, simplifying multi-ampere high-current designs and allowing thermal spreading on thermally limited surface-mount boards. The internal protection includes current limiting, safe operating area foldback, and thermal shutdown. Typical applications include adjustable point-of-load (POL) regulators after a switching pre-regulator, high-current tracking power for op-amps and references, USB and industrial 24 V bus rails, and bench lab supplies where a single wide-range LDO replaces several discrete regulators. When designing, place a high-quality 10 uF (minimum) low-ESR output capacitor as close as possible to the OUT pin and select the SET resistor (typically 1 kohm to 200 kohm) using the formula VOUT = 10 uA x RSET, where the 10 uA is the internal SET pin current. Use Kelvin sense at the load when precise regulation under load is required. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not present in the manufacturer datasheet.
LT3090IMSE - -36V, 600mA Negative LDO Regulator | Analog Devices
The Analog Devices LT3090IMSE is a -36V, 600 mA low-dropout (LDO) negative linear regulator with programmable current limit, housed in a 12-pin MSOP-EP package with an exposed thermal pad. It uses a precision 200 µA current reference followed by a rail-to-rail voltage buffer to deliver an adjustable output voltage from 0 V to -32 V, set by a single external resistor. Key electrical features include 600 mA continuous output current, low dropout operation, and paralleling capability for higher load current or thermal spreading. A Low-Dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage with a very small input-to-output voltage differential, making it essential in power management IC hierarchies. LDOs belong to the broader linear regulator family, which in turn sits inside voltage regulators and the overall power management semiconductor category. Unlike switching regulators, LDOs introduce no switching noise but dissipate more power when VIN-VOUT is large, so they are chosen specifically where noise floor, ripple rejection, and simplicity outweigh efficiency. The LT3090 is engineered around a precision current reference and a high-performance rail-to-rail operational amplifier. This two-stage architecture provides excellent load regulation (Kelvin-sensed at the OUT pin), programmable current limit, and easy paralleling of multiple devices to scale output current or spread heat. The 12-pin MSOP-EP package with exposed pad reduces junction-to-ambient thermal resistance, supporting higher continuous current on a small PCB footprint. Typical applications include negative-supply rails for op-amps and ADCs, industrial -24V bus interfaces, low-noise post-regulation after switching converters, test-and-measurement instrumentation, and any system that needs a clean negative bias. The wide -36V input range also covers telecom -48V systems after a front-end regulator. When designing with this part, place input and output capacitors close to the IC pins, Kelvin-connect the ground side of the SET resistor to the load, and verify that PCB copper area on the exposed pad can absorb worst-case dissipation (estimated Pdiss = (|VIN| - |VOUT|) × IOUT). For demanding thermal conditions, parallel multiple LT3090s on the same footprint to spread heat.
LT3094IMSE -20V 500mA Ultralow Noise Ultrahigh PSRR Negative LDO | ADI
The Analog Devices LT3094IMSE is a -20V, 500mA ultralow-noise, ultrahigh-PSRR negative LDO linear regulator in a 12-pin MSOP-EP package featuring exposed pad for thermal dissipation. It delivers a programmable output from 0V to -19.5V with 0.8 uVrms integrated noise (10 Hz to 100 kHz) and 90 dB PSRR at 1 kHz. A low-dropout (LDO) linear regulator maintains a regulated output voltage using a pass element that operates in its linear region; the LT3094 is a NEGATIVE-output LDO, meaning its output sits below ground (e.g. -5V, -12V) rather than above ground like a conventional LDO. Within the broader taxonomy it belongs to linear regulators, then voltage regulators, then power management ICs, then semiconductors. Negative LDOs are commonly used to bias RF power amplifiers, op-amp negative rails, and high-speed ADC front-ends where a quiet negative supply is mandatory. Key features include a bipolar architecture achieving 0.8 uVrms noise, 90 dB PSRR at 1 kHz, programmable current limit, fast start-up capability, programmable power-good output, and a tracking function that controls an upstream supply to minimize the LT3094's power dissipation and optimize PSRR. A bipolar enable pin and exposed thermal pad complete the integration story for compact, high-performance designs. The architecture uses an internal reference, error amplifier, and pass transistor optimized for ultralow-noise and ultrahigh-PSRR operation; the tracking function uniquely minimizes VIN-to-VOUT drop, reducing on-chip dissipation while preserving PSRR across frequency. This combination enables the part to follow a noisy upstream supply while presenting a clean rail to the load. Typical applications include RF power amplifier biasing, high-speed data converter negative supplies, op-amp negative rails, low-noise instrumentation, and precision test equipment where both ultralow noise and high PSRR are mandatory for system SNR. Industrial temperature grades (-40C to +125C) make the part suitable for factory and outdoor deployments. Designers should size the SET-pin resistor to program output voltage, ensure sufficient input/output capacitance for stability per datasheet curves, and leverage the tracking input to minimize the input-to-output differential in high-current rails. Thermal design must account for the exposed pad soldered to a sufficient copper pour. This page synthesizes distributor pricing, drop-in alternatives and ADI/MSOP-EP application notes not consolidated on a single manufacturer page, giving engineers a faster path from spec to PCB.
LT3469ETS8#TRPBF - 33V Piezo Driver with Boost Regulator
The Analog Devices LT3469ETS8#TRPBF is a transconductance amplifier with an integrated boost regulator, designed to drive piezo speakers and microactuators from a 5 V or 12 V supply while producing output voltages up to 33 V. It supports capacitive loads from 5 nF to 300 nF and is packaged in an eight-pin TSOT-23 surface-mount package. A transconductance amplifier is an amplifier category that converts an input voltage into an output current. In the LT3469, this characteristic is used to drive capacitive piezoelectric loads, where controlled current determines actuator voltage, stress, motion, and mechanical force. The integrated boost regulator supplies the higher voltage required by the output stage, simplifying systems that otherwise need a separate high-voltage supply. The main feature is its 33 V output capability, which provides useful drive range for piezo elements operated above low-voltage logic rails. The device is specified for a maximum input voltage of 16 V and a maximum output current of 40 mA. Its switching-regulator architecture allows the amplifier to develop a boosted output while the transconductance stage controls the piezo load. Because the output slew rate is limited by the maximum output current, load capacitance and required settling time directly influence actuator behavior. Typical applications include piezo speakers, ultrasonic transducers, haptic actuators, microactuators, and compact electromechanical systems. The part is useful when the actuator requires substantially more voltage than the available system rail. Designers should account for capacitor selection, boost-regulator layout, output-current limits, and the high-voltage behavior of the selected piezo element. PCB layout is critical because the SW node has sharp voltage edges and can couple into input and control traces. The Analog Devices datasheet recommends minimizing SW-node copper area, surrounding it with VCC-connected metal on three sides, shielding +IN and -IN, and using a ground plane beneath the switching regulator. Verify the actuator voltage, current, and power requirements before finalizing the external network. This page consolidates verified manufacturer information, distributor availability, package details, and engineering guidance for engineers evaluating the LT3469ETS8#TRPBF as a compact piezo-driver solution.
LT3476EUHF#PBF - Quad 1.5A LED Driver, 38-QFN | Analog Devices
The Analog Devices LT3476EUHF#PBF is a high-current quad-output DC/DC converter IC designed as a constant-current source for driving high-current LEDs, with 4 switch outputs each rated to 1.5 A in a 38-lead QFN (5x7 mm) package. It integrates both step-down (buck) and step-up (boost) capability on a single die, allowing flexible topologic selection per channel to match LED string forward voltage to the supply rail. A fixed-frequency, current-mode architecture provides stable operation across a wide supply and output voltage range, and the user-programmable switching frequency (200 kHz to 2 MHz, set via the RT pin) lets the designer trade efficiency against external component size. A quad-output LED driver is a specialized power management IC that combines four independent constant-current regulator channels into one package. Each channel regulates the current through a string of high-brightness LEDs regardless of forward-voltage variation, which is critical because LED luminance depends on current rather than voltage. Within the broader taxonomy, this part sits in the LED driver subcategory of power management ICs, which itself belongs to the larger family of switched-mode power supply (SMPS) controllers. By providing four matched channels on one die, the LT3476 eliminates the need for four discrete driver ICs and reduces BOM count, board area, and channel-to-channel timing skew in display backlighting or signage designs. Key features include four independent 1.5 A switch outputs, integrated power switches, true PWM dimming capability, and adaptive ballasting for boost topology. The wide VIN range and dual buck/boost support enable designs from a single Li-Ion cell up to multi-LED automotive strings. The exposed pad on the QFN package provides a low thermal resistance path, and the current-mode control loop simplifies compensation while offering cycle-by-cycle current limiting. Typical applications include RGB LED signage, TFT-LCD backlighting, automotive interior/exterior lighting, decorative architectural lighting, and large-format video displays. The 4-channel integration is most useful where color or zone brightness must be independently controlled. When designing with this part, calculate worst-case power dissipation per channel (Pdiss ≈ (VIN - VLED) × ILED for buck) and ensure the PCB copper pour on the exposed pad can sink that heat. Decouple VIN with at least 4.7 µF of X7R ceramic placed within 5 mm of the IC, and keep the RT resistor close to the RT pin to avoid frequency jitter.
LT3496EUFD - Triple 750mA 45V LED Driver w/ 3000:1 PWM Dimming | Analog Devices
The Analog Devices (formerly Linear Technology) LT3496EUFD is a triple-output DC/DC converter designed to operate as constant-current sources for driving high-current LEDs, integrating three independent 750mA / 45V internal switches in a 28-pin QFN (4x5 mm) plastic package with exposed pad. The device functions in step-down (Buck), step-up (Boost), or buck-boost topology on each channel, making it suitable for RGB, white, or multi-string backlight and architectural lighting applications where rail voltage can swing above or below the LED forward voltage. A triple-output LED driver is a power-management IC that combines three independently regulated constant-current channels in a single die. Each channel uses hysteretic-mode control to eliminate the compensation-network design effort typical of PWM controllers, while an internal gate driver provides PMOS LED-disconnect logic for true-color PWM dimming. The LT3496EUFD sits within the broader taxonomy of LED drivers -> power management ICs -> mixed-signal semiconductors, and is typically paired with microcontrollers and serial-interface LED controllers for display backlights. Key specifications include three independent 750mA internal switches rated to 45V, True Color PWM dimming up to a 3000:1 dimming ratio, an integrated PMOS gate driver for LED disconnect during PWM-off intervals, a wide input voltage range suitable for automotive and industrial buses, and adjustable switching frequency. The exposed-pad QFN-28 package provides a low thermal resistance path for dissipating power at full-load conditions across all three channels. According to the manufacturer datasheet, the part supports analog and PWM dimming simultaneously, simplifying implementation of brightness curves in solid-state lighting. Typical applications include RGB LED backlight drivers for LCD monitors and TVs, automotive interior and exterior lighting, architectural and stage lighting fixtures, signage and decorative LED strips, and battery-powered handheld projectors. The wide VIN range and topology flexibility also support industrial 24V bus designs and emergency-vehicle strobe circuits. When designing with this device, derate each channel to no more than 500mA continuous in enclosed fixtures with limited airflow, and place the input/output capacitors and the boost diode as close to the IC as the PCB allows. The PWM dimming pin accepts logic-level signals from any microcontroller timer, and the PMOS gate driver must be connected to an external P-channel MOSFET rated for the channel voltage. This page synthesizes distributor pricing, drop-in alternatives, and practical application guidance beyond what the manufacturer datasheet provides.
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.