Regulator-Gating Methodology with Distributed Switched Capacitor Voltage Converters

One of the primary challenges with fully integratedvoltage regulation is to maintain a high power efficiency overa wide output current range. A multiphase distributed switchedcapacitor (SC) converter with a new control method that adaptivelyturns on and off certain interleaved stages is proposed. By controlling the number of active interleaved stages basedon the load current, the proposed system achieves a higherpower efficiency for lower output currents, forcing active stagesto operate at highest possible power efficiency. By distributingthe interleaved stages, lower IR and Ldi/dt drop is achieved.