NCP81611MNTXG

Overview

The NCP81611MNTXG is a four-phase synchronous buck DC-DC switching controller manufactured by onsemi. It operates with a supply voltage range of 2.8V to 20V and supports adjustable switching frequencies from 250kHz to 1.2MHz. The device utilizes I²C and PSI serial interfaces for configuration and monitoring. It features integrated current limit, enable, frequency control, power good indication, slope compensation, and soft-start functions. The component is housed in a 40-VFQFN package with an exposed pad, measuring 5x5mm.

Feature Summary

• Four-phase synchronous buck topology for high-current load regulation
• Dual serial interface support including I²C and PSI protocols
• Integrated protection mechanisms such as current limiting and thermal shutdown
• Configurable switching frequency and soft-start capabilities

Applications

• Central processing unit (CPU) core voltage regulation
• Graphics processing unit (GPU) power delivery systems
• High-performance server and workstation mainboards
• Industrial equipment requiring multi-rail power management

Procurement Notes

Verify the current production status before ordering, as official sources indicate this specific part number may be subject to end-of-life or discontinuation notices. Confirm that the 40-QFN(5x5) package dimensions match your PCB footprint requirements. Ensure compatibility with the required I²C address settings and verify that the operating temperature range meets your environmental specifications. Cross-reference the manufacturer's latest documentation for any pinout revisions or recommended replacement components.

Selection Notes

Select this controller when designing systems requiring precise multi-phase power delivery with digital control flexibility. The wide input voltage range suits various bus architectures. Consider the thermal performance of the QFN package for your enclosure design. Verify that the host microcontroller can support the necessary I²C communication speed and protocol commands. Evaluate the need for external components based on the desired switching frequency and output ripple specifications.

Part Context

This component belongs to the NCP81611 series of multiphase controllers designed for demanding computing applications. It is part of onsemi's portfolio of power management integrated circuits aimed at improving efficiency and dynamic response in complex electronic systems. The series typically targets markets requiring stable power supplies for high-speed digital logic.

Replacement Considerations

NCP81611AMNTXG is listed as a manufacturer-recommended alternative.