Patent ID: 8704587

Claim:
A configurable multistage charge pump, comprising: a plurality of pumpcells coupled together in series, comprising a first pumpcell receiving an input voltage and at least one remaining pumpcell, wherein a last one of said at least one remaining pumpcell generates an output voltage; at least one bypass switch, each coupled to selectively provide said input voltage to a pumpcell input of a corresponding one of said at least one remaining pumpcell; and control logic, coupled to said plurality of pumpcells and to said at least one bypass switch, configured to determine one of a plurality of voltage ranges of said input voltage, to enable each of said plurality of pumpcells for a first voltage range of said plurality of voltage ranges and to disable and bypass at least one pumpcell for at least one other voltage range of said plurality of voltage ranges, wherein said control logic comprises a comparator which compares a signal indicative of said output voltage with a reference signal and which provides a clock enable signal indicative thereof to a clock enable input of each of said plurality of pumpcells.