LT3641IUFD#TRPBF

Overview

The LT3641IUFD#TRPBF is a dual monolithic buck regulator from Analog Devices, housed in a 28-lead QFN package. It operates with an input voltage range of 4V to 42V and delivers up to 1.3A per channel. The device features a fixed 2.5MHz switching frequency and adjustable output voltages from 1.265V to 40.97V. Quiescent current is specified at 290µA, with operation supported across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates power-on reset and watchdog timer functions for system protection
• Features synchronous rectification for high efficiency in both channels
• Supports independent shutdown control for each regulator output

Applications

• Industrial control systems requiring dual isolated rails
• Automotive electronics operating within wide input voltage ranges
• Telecommunications infrastructure power distribution

Procurement Notes

Verify the specific suffix against official documentation to confirm tape-and-reel packaging versus tube variants. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the ordering part number matches the exact electrical specifications required for the target application design.

Selection Notes

Select this component when dual independent buck outputs are required from a single high-voltage source. The integrated reset and watchdog features reduce external component count compared to standard dual regulators. Evaluate thermal performance requirements given the 28-QFN package constraints for continuous high-current operation.

Part Context

This part belongs to the LT3641 family of dual synchronous step-down converters. It shares the same core architecture as the LT3641IUFD#PBF but differs in packaging format. The series is designed for applications needing compact solutions with integrated system management features.

Replacement Considerations

LT3641EUFD#TRPBF is a documented parameter-equivalent alternative within the same product family.