LT3690MPUFE#TRPBF

Overview

The LT3690MPUFE#TRPBF is a monolithic synchronous step-down switching regulator designed for automotive applications. It accepts input voltages from 3.9V to 36V and provides an adjustable output voltage range of 0.8V to 20V with a maximum output current of 4A. The device operates at a fixed switching frequency of 1.5MHz, though it supports external synchronization. Key electrical parameters include a typical quiescent current of 70µA, a line regulation of 0.01%/V, and an operating temperature range from -40°C to +150°C. It utilizes a 26-pin WFQFN exposed pad package.

Feature Summary

• Automotive-grade reliability with extended high-temperature operation up to 150°C
• Integrated high-efficiency synchronous power switches eliminating external catch diodes
• Adjustable switching frequency capability for EMI optimization
• Compact QFN package design for space-constrained layouts

Applications

• Automotive infotainment systems
• Telematics control units
• Body electronics modules
• Industrial DC-DC conversion

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when placing orders. Confirm that the MPUFE designation meets required automotive qualification standards. Ensure compatibility with the intended thermal management solution given the exposed pad requirement. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or pin configurations before finalizing procurement specifications.

Selection Notes

Select this component for designs requiring robust performance in high-temperature automotive environments. The 4A current capacity suits moderate-power loads where efficiency is critical. Consider the 1.5MHz frequency for balancing component size against electromagnetic interference requirements. Verify that the input voltage range aligns with the system's supply rails. Evaluate the thermal dissipation needs based on the load current and ambient temperature constraints.

Part Context

This part belongs to the LT3690 family of synchronous buck regulators from Analog Devices. It shares core topology with variants like the LT3690EUFE but differs in automotive qualification and packaging format. The MP prefix typically denotes enhanced performance or specific automotive grade characteristics compared to standard industrial versions.

Replacement Considerations

LT3690HUFE#PBF is a related automotive variant available in tube packaging. LT3690EUFE#TRPBF serves as the industrial-grade equivalent with identical electrical specifications but different temperature ratings.