LTC3858IUH-2#PBF

DC DC Switching Controllers Overview

The LTC3858IUH-2#PBF is a dual-channel, low quiescent current synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 38V and supports switching frequencies from 75kHz to 850kHz. The device features a constant frequency current mode architecture with phase-lockable capabilities up to 850kHz. It utilizes a 32-lead QFN (5mm x 5mm) package and functions across a junction temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture designed to drive all N-channel synchronous power MOSFET stages for high-efficiency conversion.
• Constant frequency current mode control allows for phase-lockable operation up to 850kHz.
• Out-of-phase operation capability minimizes power loss and noise associated with input capacitor ESR.

DC DC Switching Controllers Applications

• High output voltage synchronous poly-phase buck converters
• Low quiescent current dual output synchronous buck converters
• General purpose DC/DC step-down regulation

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'UH-2' against official Analog Devices documentation to confirm pinout and electrical specifications match the target design requirements. Ensure the operating environment remains within the specified -40°C to +125°C junction temperature limits. Cross-reference the datasheet for any recent Product Change Notices regarding manufacturing site or material composition updates.

DC DC Switching Controllers Selection Notes

Select this component when designing systems requiring independent dual outputs with low standby current consumption. The wide input voltage range accommodates various bus architectures. Consider the thermal performance of the exposed pad QFN package for high-current applications. Verify that the required switching frequency falls within the 75kHz to 850kHz operational window for optimal efficiency.

DC DC Switching Controllers Part Context

This part belongs to the LTC3858 family of low IQ, dual 2-phase synchronous step-down controllers. It is distinct from single-output variants like the LTC3858-1 and triple-output models such as the LTC3859. The UH package denotes a specific QFN footprint suitable for compact surface-mount designs.

DC DC Switching Controllers Replacement Considerations

LTC3858EUH-2#PBF is a verified alternative within the same product family offering identical functionality in a different temperature grade variant.