LT3645EMSE#PBF

Overview

The LT3645EMSE#PBF is a dual-output power management IC featuring one synchronous buck converter and one low-dropout linear regulator. It operates with an input voltage range of 3.6V to 36V. The switching output provides adjustable voltages from 0.8V to 16V at up to 500mA, while the LDO output supports 0.8V to 8V at 200mA. Integrated into a compact 16-lead QFN package, it switches at 750kHz and functions across temperatures from -40°C to 125°C.

Feature Summary

• Integrates a high-efficiency synchronous buck converter with a precision low-dropout linear regulator in a single monolithic package.
• Supports wide input voltage ranges suitable for industrial and automotive bus architectures.
• Features independent enable controls for flexible power sequencing and system management.

Applications

• Industrial control systems requiring multiple regulated rails
• Automotive electronics operating on 12V or 24V buses
• Embedded systems needing combined switching and LDO regulation

Procurement Notes

Verify the specific suffix matches the required thermal and electrical specifications. Confirm RoHS compliance status through official manufacturer documentation. Ensure the package type aligns with PCB footprint requirements. Cross-reference datasheet revisions for any pinout or parameter updates before finalizing procurement orders.

Selection Notes

Select this component when space constraints require combining switching efficiency with LDO noise performance. The integrated topology reduces external component count compared to discrete solutions. Evaluate thermal dissipation capabilities based on total load current and ambient conditions within the target enclosure design.

Part Context

This device belongs to the LT3645 family of mixed-signal power management ICs designed by Analog Devices. It addresses applications demanding compact footprints and simplified bill-of-materials. The integration of buck and LDO stages allows for optimized power distribution networks in dense electronic assemblies.

Replacement Considerations

LT3645EUD#PBF offers identical functionality in a 16-QFN package variant.