LTC3861EUHE#PBF

DC DC Switching Controllers Overview

The LTC3861EUHE#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 a single output configuration. Key electrical parameters include a switch frequency of 2.25 MHz, a maximum duty cycle of 91.5%, and a static current of 30 mA. It functions within a temperature range of -40°C to +125°C TJ and is housed in a 36-lead QFN package.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture enabling multiphase operation for high-current distributed power systems
• Accurate current sharing capabilities between phases to optimize thermal performance
• Integrated control features including soft start, tracking, and power good indication

DC DC Switching Controllers Applications

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

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS status before procurement. Confirm the package type matches the design requirements as variations exist within the family. Check the manufacturer's latest lifecycle notices, as some listings indicate end-of-life status for certain variants. Ensure the ordering part number corresponds exactly to the required pinout and electrical specifications.

DC DC Switching Controllers Selection Notes

Select this component when designing dual-output or multiphase buck converters requiring precise current sharing. It is suitable for applications needing wide input voltage ranges up to 24 V. Consider the 36-QFN package size for board space constraints. Verify that the external MOSFETs and gate drivers are compatible with the controller's drive capabilities and switching frequency.

DC DC Switching Controllers Part Context

This part belongs to the LTC3861 series of PolyPhase controllers. It is distinct from the LTC3861-1 variant, which uses a 32-QFN package and supports different phase configurations. The EUHE suffix denotes the specific 36-lead QFN package and commercial/industrial temperature rating. It is designed for integration with discrete components or DrMOS devices.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate the LTC3861-1 only if the 32-QFN package and specific electrical differences are acceptable. Consult Analog Devices for current alternative recommendations.