A configurable voltage regulating circuit includes first through fourth switches. A flying capacitor is coupled between a common mode node and a pump node, and a sense resistance network is coupled between an output node and an input of an error amplifier and configured to provide a sensed output voltage. The error amplifier receives at another input a reference voltage and generates an error signal. A charging circuit supplies a charging current to the pump node, and controls the value of the charging current as a function of the error signal. A switch command signals generator generates respective first, second, third, and fourth switch signals to control the first switch, second switch, third switch, and fourth switch. The generator sets the configurable voltage regulating circuit as either a charge pump or a linear regulator based the input voltage being less than a first threshold or greater than a second threshold.