LTC3857EUH#PBF

DC DC Switching Controllers Overview

The LTC3857EUH#PBF is a high-performance dual step-down switching regulator controller from Analog Devices Inc. designed to drive all N-channel synchronous power MOSFET stages. It features a constant frequency current mode architecture with a phase-lockable switching frequency up to 850kHz. The device operates within an input voltage range of 4V to 60V and includes independent TRACK/SS pins for each controller to manage output ramping during startup. It offers a precision 0.8V reference, power good indicators, and current foldback protection for short-circuit conditions.

DC DC Switching Controllers Feature Summary

• Dual channel control architecture driving N-channel synchronous power MOSFETs
• Phase-locked constant frequency current mode operation up to 850kHz
• Independent soft-start and tracking capabilities per channel

DC DC Switching Controllers Applications

• Automotive always-on systems
• Battery-operated digital devices
• Distributed DC power systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS standards. Confirm package type EUH (QFN) matches design requirements. Check official distributor availability as supply may be restricted. Ensure application supports the 4V to 60V input range and required thermal dissipation for the QFN-EP-32 package.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring dual independent buck outputs with synchronized or phase-shifted operation. It is suitable where low quiescent current and wide input voltage ranges are critical. Consider the 32-pin QFN package for space-constrained designs requiring efficient heat dissipation through the exposed pad.

DC DC Switching Controllers Part Context

Part of the PolyPhase family of dual step-down controllers. Similar models include the LTC3890 and LTC3857IGN-1. The EUH suffix denotes a specific QFN package variant. It complements other Linear Technology power management solutions for multi-rail power distribution.

DC DC Switching Controllers Replacement Considerations

LTC3857IGN-1#PBF serves as a pin-compatible alternative in a 28-SSOP package. Verify thermal performance differences between QFN and SSOP packages. Ensure switching frequency and control characteristics remain compatible with existing circuit designs.