LTC3859EFE#TRPBF

DC DC Switching Controllers Overview

The LTC3859EFE#TRPBF is a high-performance triple output synchronous DC/DC switching regulator controller manufactured by Analog Devices Inc. It operates from a wide input voltage range of 4.5V to 38V, extending down to 2.5V when biased from an auxiliary supply or boost output. The device features a constant frequency current mode architecture with a phase-lockable switching frequency up to 850kHz. It drives all N-channel power MOSFET stages for buck and boost topologies. Key electrical parameters include a 0.8V precision reference, 55µA typical no-load quiescent current, and operation across a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Triple output capability supporting buck, buck, and boost configurations
• Wide input voltage range accommodating 4.5V to 38V supplies
• Phase-lockable constant frequency current mode architecture
• Independent TRACK/SS pins for synchronized start-up sequencing

DC DC Switching Controllers Applications

• Distributed DC power systems requiring multiple regulated rails
• Automotive always-on electronics and battery-operated devices
• Industrial equipment with wide input voltage variations
• Telecommunications infrastructure power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF confirms tape and reel packaging rather than tube. Confirm the EFE package variant matches the required thermal and footprint specifications for the target PCB design. Ensure the component grade meets the necessary industrial temperature requirements for the intended operating environment.

DC DC Switching Controllers Selection Notes

Select this controller when a single IC must manage three distinct output voltages using different topologies. It is suitable for designs requiring low standby power consumption due to its low quiescent current. Consider the 38-pin QFN package constraints and ensure adequate thermal dissipation paths are designed into the layout for high-current applications.

DC DC Switching Controllers Part Context

This component belongs to the LTC3859 family of synchronous controllers. It is functionally similar to other variants like the LTC3859IFE and LTC3859AIUHF, differing primarily in package type and temperature grade. The series is designed for applications needing integrated multi-rail power management without separate controllers for each rail.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC3859IFE#PBF and LTC3859AIUHF#TRPBF. Verify that pin compatibility and package dimensions align with the existing board layout before swapping between these variants.