LTC3861IUHE#PBF

DC DC Switching Controllers Overview

The LTC3861IUHE#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 delivers up to 40 A output current. The device supports adjustable output voltages from 600 mV to 5.5 V. Key electrical parameters include a fixed switching frequency of 2.25 MHz, a maximum duty cycle of 91.5%, and a quiescent current of 30 mA. It is housed in a 36-lead QFN package and functions within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual-channel PolyPhase architecture for high-current distributed power applications
• Integrated accurate current sharing mechanism between phases
• Supports wide input voltage ranges suitable for telecom and industrial systems

DC DC Switching Controllers Applications

• High current distributed power systems
• Digital signal processor (DSP) power supplies
• Telecommunications DC/DC power conversion
• Industrial power management circuits

DC DC Switching Controllers Procurement Notes

Verify component authenticity through authorized channels as the part may be subject to obsolescence notices. Confirm specific lot codes and manufacturing dates against project requirements. Ensure compatibility with existing PCB footprints and thermal management designs. Review official datasheets for any recent product change notifications or assembly site updates prior to final procurement decisions.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring high efficiency at heavy loads using external MOSFETs. The fixed 2.25 MHz frequency allows for compact passive component selection. Verify that the external gate drive circuitry matches the controller's output capabilities. Consider thermal dissipation requirements given the 40 A total output capacity across two phases.

DC DC Switching Controllers Part Context

This component belongs to the LTC3861 family of PolyPhase controllers designed for demanding power delivery applications. It serves as a core control element in multi-phase buck converter topologies. The device complements discrete power stages to provide scalable current solutions for sensitive digital loads.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.