Patent ID: 7948302

Claim:
A charge pump system, comprising: a charge pump having an input for receiving a clock signal, another input for receiving an input voltage, and an output for providing an output voltage; and a regulator for regulating the output voltage, the regulator comprising: a reference voltage terminal for providing a reference voltage; and a comparator having a first input coupled to the reference voltage terminal, a second input coupled to the output of the charge pump, and an output, the comparator including: a differential stage, the differential stage having an input coupled to the reference voltage terminal, another input coupled to the output of the charge pump, and an output, a control logic for providing a plurality of secondary clock signals derived from the clock signal, each secondary clock signal phase shifted from the clock signal and from other secondary clock signals, a plurality of interleaved latches, each latch having an input coupled to the output of the differential stage, one latch of the plurality of interleaved latches having a clock input for receiving the clock signal, each of the other latches of the plurality of interleaved latches having a clock input for receiving one of the secondary clock signals, each latch having an output, and an output stage having a plurality of inputs, each coupled to the output of each latch, the output stage providing an enable signal to the charge pump in response to outputs of the plurality of latches.