Regulator-Gating Methodology With Distributed Switched Capacitor Voltage Converters

Abstract—One of the primary challenges with fully integrated voltage regulation is to maintain a high power efficiency over a wide output current range. A multiphase distributed switched capacitor (SC) converter with a new control method that adap-tively turns on and off certain interleaved stages is proposed. By controlling the number of active interleaved stages based on the load current, the proposed system achieves a higher power efficiency for lower output currents, forcing active stages to operate at highest possible power efficiency. By distributing the interleaved stages, lower IR and Ldi/dt drop is achieved. I