LT3641EFE

Overview

The LT3641EFE#PBF is a dual synchronous step-down switching regulator manufactured by Analog Devices. It integrates two independent buck converters capable of delivering up to 1.3A per channel from an input voltage range of 4V to 42V. The device features adjustable output voltages and operates with a switch frequency selectable between 350kHz and 2.5MHz. It includes integrated power-on reset and watchdog timer functions for system protection. The component is housed in a 28-lead TSSOP package with an exposed pad, designed for surface-mount installation.

Feature Summary

• Integrates two independent synchronous buck regulators within a single monolithic package
• Includes built-in power-on reset generator and programmable watchdog timer
• Supports wide input voltage range suitable for high-voltage bus applications
• Features adjustable switching frequency to optimize efficiency and component size

Applications

• Industrial control systems requiring multiple regulated voltage rails
• Automotive electronics operating on 12V or 24V nominal buses
• Telecommunications infrastructure power distribution units
• Embedded computing platforms needing compact dual-output regulation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS compliance when ordering. Confirm the package type matches the required PCB footprint, as variations exist within the family. Check official distributor channels for current availability status, as supply levels fluctuate. Ensure the operating temperature range meets the environmental requirements of the target application before finalizing procurement.

Selection Notes

Select this component when dual isolated or non-isolated outputs are needed from a single high-voltage source. Consider the thermal performance of the TSSOP-EP package for the expected load current. Evaluate the need for external synchronization if noise immunity is critical. Verify that the required reset timing and watchdog intervals align with the system's startup and fault detection protocols.

Part Context

This part belongs to the LT3641 series of dual synchronous buck regulators. It shares functional similarities with other high-voltage DC-DC controllers but distinguishes itself by integrating both power stages and digital supervision logic into one compact solution. The series targets applications demanding space-constrained, multi-rail power management from elevated input voltages.

Replacement Considerations

LT3641HFE#PBF is a confirmed automotive-grade variant within the same family offering similar electrical characteristics.