LT3641EUFD#TRPBF

Overview

The LT3641EUFD#TRPBF is a dual monolithic buck switching regulator manufactured by Analog Devices Inc. It integrates two independent step-down converters within a single 28-lead QFN package featuring an exposed thermal pad. The device supports a wide input voltage range from 2.5V to 42V, accommodating various power supply architectures. Each channel delivers up to 1.3A of output current with adjustable output voltages starting from 0.6V. The controller operates at a programmable switching frequency between 350kHz and 2.5MHz, allowing optimization for efficiency or component size. It includes integrated power-on reset and watchdog timer functions for system protection.

Feature Summary

• Integrates two independent synchronous buck regulators in a compact footprint
• Includes built-in power-on reset generator and hardware watchdog timer
• Supports wide input voltage range suitable for industrial and automotive sources
• Features programmable switching frequency for design flexibility

Applications

• Industrial equipment requiring isolated or non-isolated dual rail generation
• Automotive infotainment and control module power distribution
• Telecommunications infrastructure powering multiple logic levels
• Embedded systems utilizing microcontrollers with separate analog and digital supplies

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the EUFD designation corresponds to the specified temperature grade and package variant required for your assembly process. Cross-reference the manufacturer part number against official Analog Devices documentation to ensure compatibility with your bill of materials and avoid substitution errors during production.

Selection Notes

Evaluate the thermal performance requirements based on the expected load current and ambient conditions, as the dual-channel design concentrates heat dissipation. Ensure the selected switching frequency aligns with the inductor specifications and electromagnetic interference constraints of the target application. Verify that the input voltage profile remains within the 2.5V to 42V operational limits under all transient conditions to maintain stable regulation and prevent damage to the internal switches.

Part Context

This component belongs to the LT3641 family of dual synchronous buck regulators designed for high-density power applications. The series is characterized by its integration of control logic, power switches, and protection features into a single monolithic structure. It serves as a solution for designers needing to reduce board space while maintaining precise regulation for multiple output rails in complex electronic systems.

Replacement Considerations

LT3641IUFD#PBF