LT3645EUD#TRPBF

Overview

The LT3645EUD#TRPBF is a dual-output power management IC from Analog Devices, integrating one synchronous buck converter and one low-dropout linear regulator. It operates within an input voltage range of 3.6V to 36V. The buck output provides up to 500mA with adjustable voltage from 0.8V to 16V, while the LDO output delivers up to 200mA at voltages between 0.8V and 8V. Switching frequency is fixed at 750kHz. The device is housed in a 16-lead QFN package measuring 3mm x 3mm and supports operation temperatures from -40°C to 125°C.

Feature Summary

• Integrates a high-efficiency synchronous step-down converter and a precision LDO for combined switching and linear regulation.
• Supports wide input voltage ranges suitable for industrial and automotive bus architectures.
• Features a compact 3mm x 3mm QFN footprint to minimize board space requirements.

Applications

• Industrial control systems requiring mixed regulation topologies
• Automotive electronics operating on varying bus voltages
• Embedded systems needing efficient power conversion with noise-sensitive analog loads

Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the specific EUD variant matches the required thermal and electrical specifications for your application environment. Cross-reference official datasheets for pin compatibility and ensure proper layout guidelines are followed for the QFN package to maintain performance integrity.

Selection Notes

Select this component when a single solution is needed to provide both regulated switching power and clean linear power. It is appropriate for designs where input voltages exceed the capabilities of standard LDOs but require isolated low-noise rails. Consider the 750kHz frequency regarding external inductor selection and EMI constraints relative to other available switching frequencies.

Part Context

This part belongs to the LT3645 family of integrated power management solutions. It combines the efficiency of a buck converter with the simplicity of an LDO. The EUD designation specifies the 16-lead QFN package type. This integration reduces component count compared to using discrete regulators, simplifying the bill of materials for complex power distribution networks.

Replacement Considerations

LT3645EUD#PBF is the tube-packaged equivalent of this reel-part. Verify if the packaging format change affects handling or assembly processes. No direct functional substitutes are listed in the provided documentation; alternative parts may require circuit redesign due to differing pinouts or electrical characteristics.