An electronic device includes a reconfigurable charge pump including pump units that can be arranged differently for varying an output voltage generated by the reconfigurable charge pump; a pump regulator coupled to the reconfigurable charge pump, the pump regulator configured to monitor the output voltage and turn the reconfigurable charge pump on or off based on the output voltage; and an arrangement control mechanism coupled to the pump regulator, the arrangement control mechanism configured to control operation of the pump regulator based on the output voltage to generate arrangement control output, wherein the arrangement control output controls electrical connections between the pump units.