A CMOS Low Power Fully Digital Adaptive Power Delivery System Based on Finite State Machine Control

A fully digital self-adjusting high efficiency power supply system has been developed based on an FSM control scheme. The system dynamically monitors circuit performance with a slacktime detector, and provides a substantially constant minimum-supply voltage for digital processors to properly operate at a given frequency with regard to different process-voltage-temperature (PVT) and load conditions. The digital FSM scheme significantly reduces the complexity of control loop implementation (<1800 gates) and its own power consumption (<100muW)