LTC3861IUH-1#PBF

DC DC Switching Controllers Overview

The LTC3861IUH-1#PBF is a dual PolyPhase synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates with an input voltage range of 3 V to 24 V and supports output voltages from 600 mV to 5.5 V. The device delivers up to 40 A of output current through two phases. Key electrical parameters include a switch frequency of 2.25 MHz, a maximum duty cycle of 91.5%, and a supply voltage range of 3 V to 5.5 V. It functions within a temperature range of -40°C to +125°C and is housed in a 32-WFQFN package.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture supporting independent or combined PolyPhase operation for high-current distribution
• Integrated accurate current sharing mechanism ensuring balanced load distribution across phases
• Supports external clock synchronization for noise reduction and system-wide timing alignment
• Includes comprehensive protection features such as overcurrent limiting, soft start, and power good indication

DC DC Switching Controllers Applications

• High-current distributed power systems requiring efficient voltage regulation
• Digital signal processor (DSP) core voltage regulation
• Telecommunications DC/DC power supply modules
• Industrial control system power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS status before ordering. Confirm the IUH-1 variant matches the required QFN-32 package dimensions and thermal pad specifications. Check current lifecycle status as some listings indicate end-of-life or limited availability. Ensure the design accounts for the 3 V to 24 V input range compatibility with the source power rail.

DC DC Switching Controllers Selection Notes

Select this component when dual-phase buck conversion is required for currents up to 40 A. The fixed 2.25 MHz switching frequency simplifies filter design but limits flexibility compared to adjustable frequency variants. Consider the 32-WFQFN package for thermal performance if space allows. Verify that the 3 V minimum supply voltage aligns with the available auxiliary power rail for the controller logic.

DC DC Switching Controllers Part Context

This part belongs to the LTC3861 series of PolyPhase controllers designed for high-efficiency power delivery. It complements other single-phase or multi-phase regulators in the Analog Devices portfolio by offering integrated phase interleaving. The device is distinct from the LTC3861EUH-1#PBF primarily by its industrial temperature grade and specific packaging configuration.

DC DC Switching Controllers Replacement Considerations

The LTC3861EUH-1#PBF is a verified alternative within the same family, differing mainly in operating temperature range and package details. Cross-reference pinouts and thermal characteristics carefully. No direct drop-in replacements from other manufacturers are confirmed in public documentation.