LTC3858IUH-2#TRPBF

DC DC Switching Controllers Overview

The LTC3858IUH-2#TRPBF is a low quiescent current, dual-channel, two-phase synchronous step-down controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4V to 38V and supports output voltages from 800mV to 24V. The device utilizes a constant frequency current mode architecture allowing a phase-lockable switching frequency up to 850kHz. Designed for high efficiency, it drives all N-channel synchronous power MOSFET stages. The component is housed in a 32-lead QFN package measuring 5mm x 5mm.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture enabling independent or interleaved two-phase operation
• Low quiescent current design optimized for standby power efficiency
• Constant frequency current mode control for stable regulation
• Phase-shift capability to minimize input capacitor ESR losses

DC DC Switching Controllers Applications

• High output voltage synchronous poly-phase buck converters
• Low quiescent current dual output synchronous buck converters
• Telecommunications and networking equipment power distribution
• Industrial control systems requiring efficient DC-DC conversion

DC DC Switching Controllers Procurement Notes

Verify the suffix TRPBF indicates tape-and-reel packaging configuration. Confirm the -2 variant designation aligns with specific pinout or feature requirements compared to standard versions. Ensure compatibility with 32-QFN (5x5) footprint during PCB layout. Cross-reference manufacturer documentation for RoHS compliance status and moisture sensitivity level prior to assembly.

DC DC Switching Controllers Selection Notes

Select this controller when dual isolated or interleaved outputs are required within a single power stage. The wide input voltage range suits applications with varying supply rails. Consider the 850kHz maximum frequency for balancing component size against transient response needs. Evaluate thermal performance based on the QFN package's exposed pad requirements for adequate heat dissipation.

DC DC Switching Controllers Part Context

This component belongs to the LTC3858 family of synchronous buck controllers. It shares architectural similarities with the LTC3858EUH demonstration circuit variants but differs in packaging and reel configuration. The part integrates control logic for driving external power stages, distinguishing it from integrated regulator ICs that include internal switches.

DC DC Switching Controllers Replacement Considerations

LTC3858EUH-2#PBF serves as a tube-packaged equivalent with identical electrical characteristics.