LT3791-1
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LT3791-1

60V 4-Switch Synchronous Buck-Boost Controller

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LTspice LT3791-1 Demo Circuit - 120W Buck-Boost Voltage Regulator (12-58V to 24V @ 5A) Download 7.00KB
Part Models 8
1ku List Price Starting From $5.66
Features
  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Synchronous Switching: Up to 98.5% Efficiency
  • Wide VIN Range: 4.7V to 60V
  • 2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
  • 6% Output Current Accuracy: 0V ≤ VOUT < 60V
  • Input and Output Current Regulation with Current Monitor Outputs
  • No Top FET Refresh in Buck or Boost
  • VOUT Disconnected from VIN During Shutdown
  • C/10 Charge Termination and Output Shorted Flags
  • Capable of 100W or greater per IC
  • 38-Lead TSSOP with Exposed Pad
Additional Details
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The LT3791-1 is a synchronous 4-switch buck-boost voltage/current regulator controller. The controller can regulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3791-1 is ideal for voltage regulator, battery/super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.

For new designs we recommend the LT8390: 60V synchronous 4-switch buck-boost controller due to its numerous performance improvements over the LT3791-1.

 


 Features
LT3791 OPEN LED Pin
LT3791-1 Replaces OPEN LED Pin With C/10 Pin Termination Flag


Applications

  • Automotive, Telecom, Industrial Systems
  • High Power Battery-Powered System
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file View Data Sheet
Documentation View All Documentation
LTspice LT3791-1 Demo Circuit - 120W Buck-Boost Voltage Regulator (12-58V to 24V @ 5A) Download 7.00KB
Part Models 8
1ku List Price Starting From $5.66
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LT3791-1

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Data Sheet

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UPDATED 05/22/2017
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LT3791-1: 60V 4-Switch Synchronous Buck-Boost Controller Data Sheet

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UPDATED 04/07/2014
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LT3791-1: 60V、4スイッチ同期整流式昇降圧コントローラ データシート

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Reliability Data

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UPDATED 03/26/2018
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UPDATED 10/01/2012
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60V, 4-Switch Synchronous Buck-Boost Controller Regulates Voltage from Wide Ranging Inputs and Charges Batteries at 98.5% Efficiency at 100W+ redirect icon

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UPDATED 10/01/2012
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広い入力電圧範囲から電圧を安定化し、98.5%の効率で100W以上のバッテリを充電する60V、4スイッチ同期整流式昇降圧コントローラ redirect icon

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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
LT3791EFE-1#PBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT3791EFE-1#TRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791HFE-1#PBF 38-Lead TSSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791HFE-1#TRPBF 38-Lead TSSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791IFE-1#PBF 38-Lead TSSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791IFE-1#TRPBF 38-Lead TSSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791MPFE-1#PBF 38-Lead TSSOP w/ EP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LT3791MPFE-1#TRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

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Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3791EFE-1#PBF

PRODUCTION

LT3791EFE-1#TRPBF

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LT3791HFE-1#PBF

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LT3791HFE-1#TRPBF

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LT3791IFE-1#PBF

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Delta Qualification Matrix

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Jul 31, 2020

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LT3791EFE-1#PBF

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LT3791EFE-1#TRPBF

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LT3791HFE-1#PBF

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LT3791HFE-1#TRPBF

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LT3791IFE-1#PBF

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LT3791IFE-1#TRPBF

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LT3791MPFE-1#PBF

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LT3791MPFE-1#TRPBF

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pdf

PCN20_0245_Form

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Material_Report

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Delta Qualification Matrix

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Qualification Results Summary

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Apr 6, 2022

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3791EFE-1#PBF

PRODUCTION

LT3791EFE-1#TRPBF

PRODUCTION

LT3791HFE-1#PBF

PRODUCTION

LT3791HFE-1#TRPBF

PRODUCTION

LT3791IFE-1#PBF

PRODUCTION

LT3791IFE-1#TRPBF

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LT3791MPFE-1#PBF

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LT3791MPFE-1#TRPBF

PRODUCTION

pdf

PCN22_0068_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

Download
Jul 31, 2020

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LT3791EFE-1#PBF

PRODUCTION

LT3791EFE-1#TRPBF

PRODUCTION

LT3791HFE-1#PBF

PRODUCTION

LT3791HFE-1#TRPBF

PRODUCTION

LT3791IFE-1#PBF

PRODUCTION

LT3791IFE-1#TRPBF

PRODUCTION

LT3791MPFE-1#PBF

PRODUCTION

LT3791MPFE-1#TRPBF

PRODUCTION

pdf

PCN20_0245_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

Download

pdf

Other

external-icon

pdf

Qualification Results Summary

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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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LT3791-1 Demo Circuit - 120W Buck-Boost Voltage Regulator (12-58V to 24V @ 5A) Download

7.00K

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