LTC3858IUH#TRPBF

DC DC Switching Controllers Overview

The LTC3858IUH#TRPBF is a low quiescent current, dual-channel synchronous step-down switching regulator 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 features a constant frequency current mode architecture with a phase-lockable switching frequency between 50kHz and 900kHz. It utilizes a 32-lead QFN (5mm x 5mm) package and functions within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture enables out-of-phase operation to minimize input capacitor ESR power loss and noise
• Low quiescent current design optimizes efficiency in battery-powered applications
• Constant frequency current mode control allows for precise regulation and fast transient response
• Phase-lockable frequency capability facilitates synchronization with external clocks or other controllers

DC DC Switching Controllers Applications

• High output voltage synchronous poly-phase buck converters
• Low quiescent current dual output synchronous buck converters
• Battery-powered portable equipment requiring high efficiency
• Industrial systems utilizing single-sided layout designs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the IUH variant meets the required industrial temperature specifications compared to standard EUH versions. Ensure compatibility with N-channel MOSFET drivers as the controller does not include integrated power switches. Cross-reference datasheet revisions to confirm pinout consistency for existing PCB layouts.

DC DC Switching Controllers Selection Notes

Select this component when designing dual-output DC/DC converters requiring independent channel control. The wide input voltage range suits applications powered by single-cell lithium batteries or unregulated sources. Consider the 32-lead QFN package constraints for thermal management in high-current scenarios. Evaluate the phase-lockable feature if system-wide clock synchronization is necessary to reduce electromagnetic interference.

DC DC Switching Controllers Part Context

This part belongs to the LTC3858 series of low IQ dual 2-phase synchronous step-down controllers. It shares architectural similarities with the LTC3853 triple output controller but offers dual-channel flexibility. The device complements Analog Devices' portfolio of high-performance PMICs designed for space-constrained, high-efficiency power solutions in industrial and communications markets.

DC DC Switching Controllers Replacement Considerations

The LTC3858EUH#PBF serves as a tube-packaged alternative with identical electrical characteristics. Designers may also consider the LTC3859A for triple output requirements including boost topology. Verify pin-to-pin compatibility before substituting with other family members to ensure proper interface matching.