an apparatus and method for a dc - dc charge pump voltage converter - regulator circuit includes a control circuit , a multiplier circuit , and a feedback circuit . the feedback circuit includes a load circuit , a comparator circuit , and a voltage reference circuit . the multiplier circuit produces an output signal by multiplying a supply signal according to a multiplication factor . the output signal is communicated to the load circuit . the output signal is measured producing a sense signal . the voltage reference circuit produces a reference voltage . the control circuit regulates the output signal according the result of a comparison between the sense signal and the reference voltage . in one embodiment , the multiplication factor is adjusted to compensate for a change in the supply signal . the multiplication factor may be increased to compensate for a decrease in the supply signal .