NCP81101A PWM Controller IC

The NCP81101A PWM Controller IC from onsemi (ON Semiconductor) is a high-performance digital PWM controller designed for CPU and GPU VRM (Voltage Regulator Module) and DC-DC buck converter applications in modern laptop and desktop motherboards. The “A” suffix indicates a revised or improved version of the base NCP81101, with enhancements in control stability and performance, while maintaining form-factor compatibility.

This IC is commonly used to regulate core voltage rails in high-performance computing platforms where precise power delivery and fast transient response are critical. It is widely required in motherboard repair and replacement work. All units supplied by OKSpare are quality tested to ensure reliable operation and long service life.

Technical Specifications

• Digital PWM controller for VRM and DC-DC applications

• Designed for CPU & GPU core voltage regulation

• Revised A-version with improved control stability

• Fast transient response for load changes

• High-efficiency power regulation support

• Integrated protection features (OVP, UVP, OCP)

• Compatible with modern synchronous buck power stages

• Compact QFN package suitable for motherboard layouts