LT3758
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LT3758

High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller

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Documentation View All Documentation
LTspice LT3758 - Switching Regulators Download 3.98 KB LTspice LT3758 Demo Circuit - High Efficiency SEPIC Converter (8-72V to 12V @ 2A) Download 4.00KB LTspice LT3758 Demo Circuit - Automotive, Telecom & Industrial Isolated Flyback Converter (18-72V to 5V @ 2A) Download 6.00KB LTspice LT3758 Demo Circuit - High Input Voltage Flyback Controller (48V to 5V @ 2A) Download 4.00KB LTspice LT3758 Demo Circuit - High Efficiency SEPIC Converter (18-72V to 24V @ 1A) Download 4.00KB
Part Models 26
1ku List Price Starting From $2.84
Features
  • Wide Input Voltage Range: 5.5V to 100V
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Current Mode Control Provides Excellent Transient Response
  • Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1μA
  • Internal 7.2V Low Dropout Voltage Regulator
  • Programmable Input Undervoltage Lockout with Hysteresis
  • Programmable Soft-Start
  • Small 10-Lead DFN (3mm × 3mm) and MSOPE Packages
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT3758/LT3758A are wide input range, current mode, DC/DC controllers which are capable of generating either positive or negative output voltages. They can be configured as either a boost, flyback, SEPIC or inverting converter. The LT3758/LT3758A drive a low side external N-channel power MOSFET from an internal regulated 7.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages.

The operating frequency of LT3758/LT3758A can be set with an external resistor over a 100kHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A minimum operating supply voltage of 5.5V, and a low shutdown quiescent current of less than 1μA, make the LT3758/LT3758A ideally suited for batterypowered systems.

The LT3758/LT3758A feature soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. The LT3758A has improved load transient performance compared to the LT3758.

APPLICATIONS

  • Automotive
  • Telecom
  • Industrial
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file View Data Sheet (Rev.H)
Documentation View All Documentation
LTspice LT3758 - Switching Regulators Download 3.98 KB LTspice LT3758 Demo Circuit - High Efficiency SEPIC Converter (8-72V to 12V @ 2A) Download 4.00KB LTspice LT3758 Demo Circuit - Automotive, Telecom & Industrial Isolated Flyback Converter (18-72V to 5V @ 2A) Download 6.00KB LTspice LT3758 Demo Circuit - High Input Voltage Flyback Controller (48V to 5V @ 2A) Download 4.00KB LTspice LT3758 Demo Circuit - High Efficiency SEPIC Converter (18-72V to 24V @ 1A) Download 4.00KB
Part Models 26
1ku List Price Starting From $2.84
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LT3758

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UPDATED 06/08/2017
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LT3758: High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller Data Sheet (Rev.H)

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LT3758/LT3758A: High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller Data Sheet

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UPDATED 10/11/2012
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LT3758: 高入力電圧の昇圧、フライバック、SEPIC および反転コントローラ データシート

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3758AEDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3758AEMSE#PBF 10-Lead MSOP w/ EP external-link
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LT3758AIDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3758AIMSE#PBF 10-Lead MSOP w/ EP external-link
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LT3758AIMSE#TRPBF 10-Lead MSOP w/ EP external-link
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LT3758AMPMSE#PBF 10-Lead MSOP w/ EP external-link
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LT3758EDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3758EMSE#PBF 10-Lead MSOP w/ EP external-link
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LT3758EMSE#TRPBF 10-Lead MSOP w/ EP external-link
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LT3758IDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3758IMSE#PBF 10-Lead MSOP w/ EP external-link
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LT3758IMSE#TRPBF 10-Lead MSOP w/ EP external-link
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LT3758MPMSE#PBF 10-Lead MSOP w/ EP external-link
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Oct 11, 2022

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Delta Qualification Matrix

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Feb 4, 2020

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

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Apr 18, 2022

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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LT3758AEMSE#TRPBF

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LT3758AHMSE#PBF

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LT3758AHMSE#TRPBF

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LT3758HMSE#PBF

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LT3758HMSE#TRPBF

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LT3758MPMSE#TRPBF

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PCN22_0244_Form

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Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Feb 4, 2020

- 20_0130

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT3758AEMSE#PBF

PRODUCTION

LT3758AEMSE#TRPBF

PRODUCTION

LT3758AHMSE#PBF

PRODUCTION

LT3758AHMSE#TRPBF

PRODUCTION

LT3758AIMSE#PBF

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LT3758AIMSE#TRPBF

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LT3758EMSE#PBF

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LT3758IMSE#PBF

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LT3758MPMSE#PBF

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PCN20_0130_Form

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Material_Report

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Apr 18, 2022

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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LT3758AHMSE#TRPBF

PRODUCTION

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PCN22_0050_Form

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Qualification Results Summary

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Delta Qualification Matrix

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Software & Part Ecosystem

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LT3757
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Boost, Flyback, SEPIC and Inverting Controller

Evaluation Kits 2

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DC1412A

LT3758EMSE Demo Board | Flyback, VIN: 18V to 75V, VOUT: 3.3V/3A, (3 × 3 QFN)

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DC1412A

LT3758EMSE Demo Board | Flyback, VIN: 18V to 75V, VOUT: 3.3V/3A, (3 × 3 QFN)

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DC1412A
LT3758EMSE Demo Board | Flyback, VIN: 18V to 75V, VOUT: 3.3V/3A, (3 × 3 QFN)
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Product Detail

Demonstration circuit 1412A features the LT3758EMSE in a 300kHz Flyback converter circuit, designed for 3.3V/3A output from a 18V to 75V input. The LT3758EMSE operates over an input range of 5.5V to 100V, suitable for automotive, telecom and industrial applications. It also exhibits low shutdown quiescent current of 1μA, making them an ideal fit for battery-operated systems. Thanks to a novel FBX pin architecture, the LT3758EMSE can be connected directly to a divider from either a positive output or a negative output to ground.

Resources

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DC1412A - Demo Manual Download

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DC1412A - Design Files Download

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DC1412A - Schematic Download

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DC1342B

LT3758EMSE Demo Board | SEPIC, VIN: 18V to 72V, VOUT: 24V/1A, (3 × 3 QFN)

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DC1342B

LT3758EMSE Demo Board | SEPIC, VIN: 18V to 72V, VOUT: 24V/1A, (3 × 3 QFN)

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DC1342B
LT3758EMSE Demo Board | SEPIC, VIN: 18V to 72V, VOUT: 24V/1A, (3 × 3 QFN)
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Product Detail

Demonstration circuit 1342B features the LT3758AEMSE in a 300kHz SEPIC converter circuit, designed for a 24V output from a 18V to 72V input. The LT3758A operates over an input range of 5.5V to 100V, and features a novel FBX pin architecture, which allows it to be connected directly to a resistor divider from either a positive output voltage or a negative output voltage.


 


Resources

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DC1342B - Demo Manual Download

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DC1342B - Design Files Download

534.00K

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DC1342B - Schematic Download

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Evaluation Kits2

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DC1412A

LT3758EMSE Demo Board | Flyback, VIN: 18V to 75V, VOUT: 3.3V/3A, (3 × 3 QFN)
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DC1342B

LT3758EMSE Demo Board | SEPIC, VIN: 18V to 72V, VOUT: 24V/1A, (3 × 3 QFN)

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LT3758 - Switching Regulators Download

3.98 K

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LT3758 Demo Circuit - High Efficiency SEPIC Converter (8-72V to 12V @ 2A) Download

4.00K

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LT3758 Demo Circuit - Automotive, Telecom & Industrial Isolated Flyback Converter (18-72V to 5V @ 2A) Download

6.00K

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LT3758 Demo Circuit - High Input Voltage Flyback Controller (48V to 5V @ 2A) Download

4.00K

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LT3758 Demo Circuit - High Efficiency SEPIC Converter (18-72V to 24V @ 1A) Download

4.00K

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