LTC3859AHUHF#TRPBF

DC DC Switching Controllers Overview

The LTC3859AHUHF#TRPBF is a high-performance triple output synchronous DC/DC switching regulator controller designed to drive all N-channel power MOSFET stages. It features a constant frequency current mode architecture with a phase-lockable switching frequency range of 75 kHz to 850 kHz. The device operates from a wide input supply voltage range of 4.5 V to 38 V, extending down to 2.5 V after startup when biased from an auxiliary source. It supports Buck, Buck/Boost, and SEPIC topologies with output voltages adjustable from 0.8 V to 24 V or 60 V depending on the configuration. The component is housed in a 38-pin QFN package.

DC DC Switching Controllers Feature Summary

• Supports triple output configurations including buck, buck/buck, and buck/boost topologies for flexible power distribution.
• Enables driving of all N-channel power MOSFET stages to maximize efficiency across various load conditions.
• Integrates a constant frequency current mode architecture allowing for phase-lockable switching frequencies up to 850 kHz.

DC DC Switching Controllers Applications

• High efficiency dual 12V/3.3V synchronous buck/boost converter circuits
• Triple output synchronous buck/boost converters generating 24V, 1V, and 1.2V rails
• Wide input range dual channel 3.3V/8.5V synchronous buck/boost applications

DC DC Switching Controllers Procurement Notes

Verify that the specific suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the AHUHF grade meets the extended temperature specifications necessary for the intended operating environment. Ensure compatibility with the 38-QFN footprint during PCB layout validation before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring three independent regulated outputs from a single IC. It is suitable for applications needing wide input voltage ranges and high efficiency through N-channel MOSFET implementation. Consider the phase-lockable frequency feature if synchronization with other system clocks is required to minimize electromagnetic interference.

DC DC Switching Controllers Part Context

This component belongs to the LTC3859A series of low IQ, triple output synchronous controllers manufactured by Analog Devices Inc. It is part of the broader PMIC portfolio focused on efficient power management solutions. The device complements other regulators in the family by providing multi-rail support without requiring multiple discrete controller ICs.

DC DC Switching Controllers Replacement Considerations

The LTC3859EUHF#TRPBF is a confirmed substitute within the same product family offering similar triple output capabilities.