LTC3779HFE#TRPBF

DC DC Switching Controllers Overview

The LTC3779HFE#TRPBF is a synchronous four-switch buck-boost switching controller from Analog Devices Inc., designed for high-voltage applications. It operates with an input voltage range of 4.5 V to 150 V and supports output voltages from 1.2 V to 150 V. The device features a fixed-frequency current mode architecture with programmable switching frequencies between 50 kHz and 600 kHz. It includes a precision 1.2 V reference, power good indicator, and soft-start capability. The H suffix indicates an extended temperature range up to +150°C junction temperature. Packaged in a 38-TSSOP with exposed pad.

DC DC Switching Controllers Feature Summary

• Synchronous four-switch buck-boost topology supporting both step-down and step-up conversion modes
• Wide operating input and output voltage range accommodating high-voltage systems
• Programmable constant frequency operation with phase-lock loop synchronization capability
• Integrated pulse skip mode for light-load efficiency and forced continuous mode for noise-sensitive environments

DC DC Switching Controllers Applications

• Telecommunications power systems
• Avionics power distribution
• Automotive electronics
• Industrial control systems
• Battery charging equipment

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'H' confirms the extended temperature rating up to 150°C junction temperature against project requirements. Confirm package integrity for the 38-TSSOP-EP form factor. Ensure design compatibility with the 4.5V to 150V operational window. Cross-reference datasheet revisions for any recent manufacturing changes.

DC DC Switching Controllers Selection Notes

Select this component when wide input/output voltage ranges exceeding standard regulators are required. The four-switch architecture enables efficient buck-boost operation without external diodes. Consider the 600kHz maximum frequency for smaller passive component sizing. Evaluate thermal performance given the high junction temperature capability.

DC DC Switching Controllers Part Context

This part belongs to the LTC3779 family of buck-boost controllers. The 'H' designation specifically denotes the military/extended grade variant capable of surviving higher thermal stresses compared to standard industrial grades. It shares core functionality with other variants but differs in environmental qualification limits.

DC DC Switching Controllers Replacement Considerations

LTC3779IFE#TRPBF serves as a direct functional substitute with identical electrical specifications but limited to a -40°C to +125°C junction temperature range.