Abstract: A power supply system includes a first driver circuit to control a corresponding switching of a first switch device and a second switch device in the power supply system via different drive circuits. To reduce losses and thus improve efficiency of the power supply system, a first driver circuit can be configured to initiate a faster rate of transitioning the first switch device between ON and OFF states than a second driver initiates transitioning of the second switch device between ON and OFF states. To reduce the effects of introducing unwanted ripple voltage on an output signal used to drive a dynamic load, a controller in the power supply system can be configured to initiate shedding or adding of multiple voltage converter phases at the same time when load requirements cross a threshold value.

Abstract: A digital controller for a voltage regulator module (VRM) having single phase or multiphase power converters, and an optional dynamic conversion circuit, is disclosed. The digital controller improves the transient response of the VRM during harsh load current transients, and permits a substantial reduction in output capacitance of the VRM. When used with multiphase interleaved power converters, for a given load current requirement, the digital converter permits the number of interleaved phases of the VRM to be minimized. A VRM with the digital controller demonstrates low cost, high power density, high efficiency, and fast transient response.