LTC3859AMPUHF#TRPBF

DC DC Switching Controllers Overview

The LTC3859AMPUHF#TRPBF is a high-performance triple output synchronous DC/DC switching regulator controller from Analog Devices. It drives all N-channel power MOSFET stages for buck, buck, and boost topologies. The device operates from a wide input supply range of 4.5V to 38V, extending to 2.5V when biased from an auxiliary source. It features a constant frequency current mode architecture with a phase-lockable switching frequency up to 850kHz. The component is housed in a 38-pin TSSOP package with an exposed pad.

DC DC Switching Controllers Feature Summary

• Supports triple output configurations including dual buck and one boost converter
• Enables operation from low input voltages via auxiliary biasing
• Features improved Burst Mode operation for enhanced light load efficiency

DC DC Switching Controllers Applications

• Industrial systems requiring multiple regulated voltage rails
• Automotive electronics utilizing wide input voltage ranges
• Telecommunications infrastructure power distribution

DC DC Switching Controllers Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging. Confirm the AMPUHF designation corresponds to the TSSOP-38 package variant. Ensure the A grade specification meets the required temperature and performance criteria for the target application environment before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring three independent outputs from a single IC. It is suitable for applications needing flexible topology combinations such as buck-buck-boost. Consider the 38-pin TSSOP footprint for board layout constraints. Verify that external MOSFET selection aligns with the controller's drive capabilities and switching frequency settings.

DC DC Switching Controllers Part Context

This component belongs to the LTC3859 family of synchronous controllers. It shares core architecture with variants like the EUHF and IUHF but differs in package type and specific feature sets such as Burst Mode optimization. The family is designed for high-efficiency power management in demanding environments.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other LTC3859A variants with different packages or suffixes. Cross-referencing pin compatibility and electrical specifications is essential when considering alternative part numbers within the same product line.