In described examples, a multi-stage charge pump includes first, second and third charge pump stages connected in series. Each of the first, second and third charge pump stages includes a charge pump circuit of a first type that increases an input signal of a respective charge pump circuit by up to a given amount. The multi-stage charge pump also includes a level shifter that swings a level clock signal between a voltage of an output signal of the third charge pump stage and one of an offset voltage and ground. The multi-stage charge pump further includes a charge pump circuit of a second type that increases the voltage of the output of the third charge pump stage by up to another amount and provides an output and the other amount is set by the level shifter. Also, the multi-stage charge pump includes a charge pump circuit of a third type.