NCP81111MNI3TXG

Overview

The NCP81111MNI3TXG is a 3-phase VR12.5/VR12.6 controller IC manufactured by onsemi, designed for high-performance CPU power delivery. It features a single programmable output and operates within an input voltage range of 4.75V to 5.25V. The device supports switching frequencies up to 1200 kHz and functions across a temperature range of -10°C to 100°C. Packaged in a compact 32-VFQFN (5x5 mm) with an exposed pad, it complies with RoHS3 standards and carries an MSL rating of 1.

Feature Summary

• Complies with Intel VR12.5 and VR12.6 specifications for modern processor power management
• Supports multi-phase buck topology with programmable output voltage control
• Integrates advanced protection mechanisms including thermal shutdown and undervoltage lockout
• Enables dynamic voltage scaling via digital interface for optimized system efficiency

Applications

• Intel Core processor power stages
• High-performance desktop motherboard designs
• Laptop and mobile workstation mainboard power systems

Procurement Notes

Verify the specific suffix '3' against official onsemi documentation to confirm pin compatibility and feature set, as variations exist within the NCP81111 family. Check current availability status, as some variants have reached end-of-life or discontinuation. Ensure the selected package matches the required PCB footprint and thermal requirements for the target application design.

Selection Notes

Select this component when designing power stages requiring strict adherence to Intel VR12.5/VR12.6 protocols. It is suitable for applications needing three-phase control with high-frequency operation to minimize passive component size. Consider the 32-QFN package for space-constrained layouts and verify thermal dissipation capabilities given the exposed pad requirement for optimal heat transfer.

Part Context

The NCP81111 series belongs to onsemi's portfolio of specialized PMICs targeting computer and server applications. These controllers are engineered to drive synchronous buck converters for central processing units. The series offers flexibility in phase count and frequency, allowing designers to balance performance, efficiency, and board area constraints while maintaining compatibility with industry-standard communication protocols.

Replacement Considerations

Public confirmed substitute part numbers: NCP81111MNI0TXG, NCP81111MNI5TXG, NCP81111MNDFTXG, NCP81111MNI7TXG.