NCP81141

NCP81141 Single-Phase Controller with SVID Interface for Desktop and Notebook CPU Applications The NCP81141 Single−Phase buck solution is optimized for Intel VR12.6 compatible CPUs. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed−forward, and adaptive voltage positioning to provide accurately regulated power for both Desktop and Notebook applications. The single phase controller uses DCR current sensing providing the fastest initial response to dynamic load events at reduced system cost. The NCP81141 incorporates an internal MOSFET driver for improved system efficiency. High performance operational error amplifiers are provided to simplify compensation of the system. Patented Dynamic Reference Injection further simplifies loop compensation by eliminating the need to compromise between closed−loop transient response and Dynamic VID performance. Patented Total Current Summing provides highly accurate digital current monitoring. Features Meets Intel™ VR12.6 Specifications High Performance Operational Error Amplifier Digital Soft Start Ramp Dynamic Reference Injection “Lossless” DCR Current Sensing Adaptive Voltage Positioning (AVP) Switching Frequency Range of 250 kHz – 1 MHz VIN Range 4.5 V − 25 V Startup into Pre−Charged Load While Avoiding False OVP Vin Feed Forward Ramp Slope Over Voltage Protection (OVP) and Under Voltage Protection (UVP) Over Current Protection (OCP) VR−RDY ...