LT3791-1

PRODUCTION

60V 4-Switch Synchronous Buck-Boost Controller

Analog Devices LT3791-1 Product Info

10 February 2026 5

Features

4-Switch Single Inductor Architecture Allows V_IN Above, Below or Equal to V_OUT
Synchronous Switching: Up to 98.5% Efficiency
Wide V_IN Range: 4.7V to 60V
2% Output Voltage Accuracy: 1.2V ≤ V_OUT < 60V
6% Output Current Accuracy: 0V ≤ V_OUT < 60V

Input and Output Current Regulation with Current Monitor Outputs
No Top FET Refresh in Buck or Boost
V_OUT Disconnected from V_IN During Shutdown
C/10 Charge Termination and Output Shorted Flags
Capable of 100W or greater per IC
38-Lead TSSOP with Exposed Pad

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.

Part details & applications

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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