LT3668IMSE#TRPBF

Overview

The LT3668IMSE#TRPBF is a mixed-signal power management IC featuring one synchronous buck converter and two low-dropout linear regulators. It operates from an input voltage range of 1.6V to 40V. The buck regulator delivers up to 400mA with adjustable output, while the LDOs provide 200mA each. Switching frequency ranges from 250kHz to 2.2MHz. It is housed in a 16-lead MSOP package with an exposed pad and supports junction temperatures up to 150°C.

Feature Summary

• Integrates a high-efficiency synchronous buck converter alongside dual low-dropout linear regulators for comprehensive power distribution.
• Supports wide input voltage ranges suitable for battery-powered and single-supply applications.
• Features adjustable switching frequencies to optimize efficiency and minimize external component size.
• Designed for high thermal performance with extended temperature operation capabilities.

Applications

• Portable medical devices requiring multiple regulated rails
• Industrial instrumentation with mixed analog and digital loads
• Battery-operated equipment needing efficient step-down conversion
• Automotive infotainment systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the requested quantity matches available reel sizes. Check for any recent product change notices regarding package or material updates.

Selection Notes

Select this component when a compact solution combining switching regulation and linear regulation is required. The integrated topology reduces board space compared to discrete solutions. Consider the 400mA buck current limit and 200mA LDO limits against total system load requirements. Evaluate thermal dissipation needs given the 16-MSOP package constraints.

Part Context

This part belongs to the LT3668 family of mixed-mode power management ICs. It combines the efficiency of a switcher with the low noise of an LDO. The IMSE variant specifies industrial temperature range and MSOP packaging. It serves as a consolidated power solution for space-constrained designs.

Replacement Considerations

LT3668HMSE#PBF offers similar functionality but in tube packaging instead of tape-and-reel. Verify pin compatibility and thermal characteristics before substitution. Ensure the replacement meets the same electrical specifications for input voltage and output currents.