Patent ID: 7737765

Claim:
A charge pump system comprising: a charge pump including an output stage; and a plurality of boost circuits, one of said plurality of boost circuits selectively and successively boosting voltage on the input of the output stage of the charge pump and others of said plurality of boost circuits coupled to an output of the output stage and selectively and successively boosting voltage on the output of the output stage, each of the others of said plurality of boost circuits increasing the boost voltage on said output in response to a load on said output by said others of said plurality of boost circuits and in response to being selected, and becoming loadless on said output after said each of the others of said plurality of boost circuits has successively boosted a voltage on said output, said each of the plurality of boost circuits becoming loadless in response to said successive boosting, all of said others of said plurality of boost circuits being loadless on said output after all of said others of said plurality of boost circuits have been selected and have successively boosted the voltage on said output; wherein the plurality of boost circuits maintain a ratio of boost capacitance to overall output stage capacitance for each successive boost as each of the plurality of boost circuits becomes loadless.