LT3667HMSE#PBF

Overview

The LT3667HMSE#PBF is a high-efficiency, synchronous step-down switching regulator manufactured by Analog Devices Inc. It integrates a 40V N-channel power switch and operates from an input voltage range of 4.3V to 40V. The device delivers up to 400mA of output current with three independent outputs. It features a wide adjustable switching frequency range from 250kHz to 2.2MHz, allowing for optimization of external component size and transient response. The IC includes dual fault protection mechanisms and operates within a junction temperature range of -40°C to +150°C.

Feature Summary

• Integrates a high-voltage N-channel power switch capable of handling input voltages up to 40V
• Provides three independent regulated outputs with combined current capabilities
• Features dual fault protection mechanisms for enhanced system reliability
• Supports wide-range switching frequency adjustment to optimize efficiency and component size

Applications

• Industrial control systems requiring multiple isolated or non-isolated rails
• Automotive electronics operating in harsh electrical environments
• Avionics power distribution networks
• Battery-powered equipment with wide input voltage ranges

Procurement Notes

Verify the specific suffix and package type against the official datasheet to ensure compatibility with your PCB footprint and thermal requirements. Confirm RoHS compliance status and material declarations prior to integration. Check for any recent Product Change Notices (PCNs) regarding epoxy or marking changes that may affect assembly processes or long-term availability.

Selection Notes

Select this component when a single-chip solution is needed for multiple low-current outputs from a higher voltage bus. The wide switching frequency range allows designers to balance between electromagnetic interference (EMI) performance and passive component size. Ensure the thermal design accounts for the maximum junction temperature rating and the specific duty cycle requirements of the application.

Part Context

This part belongs to the LT3667 family of multi-output buck regulators. It is designed to simplify power architecture by replacing discrete solutions with a single integrated circuit. The HMSE package provides a compact surface-mount form factor suitable for space-constrained designs. It serves as a centralized power management unit for systems requiring stable, regulated voltages from varying input sources.

Replacement Considerations

Consult the official Analog Devices cross-reference guide for verified alternatives. Direct pin-to-pin replacements must match the 40V input rating, 400mA total output capability, and 16-MSOP-EP package dimensions. Verify that any substitute supports the required dual fault protection and switching frequency range.