Techniques of providing a low output voltage, high current capability
charge pump are given. The charge pump has multiple capacitors along with
switching circuitry. In an initialization phase, the first plate of each
of the capacitors is connected to receive a regulator voltage and the
second plate of each capacitor is connected to ground. In a transfer
phase, the capacitors are connected in series, where, for each capacitor
after the first, the second plate is connected to the first plate of the
preceding capacitor in the series. The output voltage of the pump is from
the first plate of the last capacitor in the series. Regulation circuitry
generates the regulator voltage from a reference voltage to have a value
responsive to the output voltage level of the pump.