LTC3861EUH-1#PBF

DC DC Switching Controllers Overview

The LTC3861EUH-1#PBF is a dual PolyPhase synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within 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 output current with a fixed switching frequency of 2.25 MHz, though it supports programmable frequencies between 250 kHz and 3 MHz. It features a 30 mA static current and functions in temperatures from -40°C to +125°C. Packaged in a 32-WFQFN (5x5 mm) exposed pad, it provides two independent PWM outputs for driving external N-channel MOSFETs.

DC DC Switching Controllers Feature Summary

• Dual PolyPhase architecture enables accurate current sharing and reduced output ripple through interleaved phase operation.
• Integrated AccuCurrent technology ensures precise load line regulation and dynamic response without requiring external compensation components.
• Supports flexible clock synchronization and phase control for multi-controller systems or noise-sensitive applications.

DC DC Switching Controllers Applications

• High-current distributed power systems
• Digital signal processor (DSP) core voltage regulation
• Telecommunications DC/DC power supplies
• Industrial point-of-load converters

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and tape/reel versus tube packaging requirements against the latest manufacturer datasheet, as availability may vary by region. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the ordering part number matches the exact temperature grade and package variant required for your design.

DC DC Switching Controllers Selection Notes

Select this component when designing high-efficiency, high-current buck converters requiring precise current balancing between phases. It is suitable for applications needing wide input voltage ranges and flexible switching frequency options. Consider the external gate drive requirement and ensure adequate PCB thermal management for the QFN package.

DC DC Switching Controllers Part Context

This part belongs to the LTC3861 family of dual multiphase controllers designed for demanding power delivery applications. It complements other Linear Technology (now Analog Devices) PMIC solutions by offering scalable power stages. The EUH-1 variant specifically denotes the 32-lead QFN package optimized for surface-mount assembly in compact designs.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed direct substitutes are not available in the provided documentation. Designers should consult Analog Devices for pin-compatible alternatives or updated lifecycle notices, as some variants may be subject to end-of-life transitions.

DC DC Switching Controllers FAQ

Does the LTC3861EUH-1 include integrated power MOSFETs?

No, it is a controller that requires external N-channel synchronous MOSFETs and discrete gate drivers or DrMOS devices to complete the power stage.

What is the maximum duty cycle supported by this controller?

The device supports a maximum duty cycle of 91.5%, allowing for efficient conversion from higher input voltages to low output voltages.