The NCP4200 is an integrated power control IC with a PMBus interface. It combines a highly efficient, multi-phase, synchronous buck switching regulator controller with a PMBus interface, which enables digital programming of key system parameters to optimize system performance and provide feedback to the system. It uses an internal 8-bit DAC to read a Voltage Identification (VID) code directly from the processor, which is used to set the output voltage between 0.375 V and 1.6 V. This device uses a multi-mode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VR size and efficiency. The NCP4200 can be programmed to provide 2-, 3-, or 4-phase operation, allowing for the construction of up to four complementary buck-switching stages. The NCP4200 supports PSI, which is a Power Save Mode. The NCP4200 includes a PMBus interface which can be used to program system set points such as voltage offset, load-line and phase balance and output voltage. Key system performance data, such as CPU current, CPU voltage, and power and fault conditions can also be read back over the PMBus from the NCP4200. The NCP4200 is specified over the extended commercial temperature range of 0C to +85C and is available in a 40 Lead QFN package.