Power supply for gate driver in switched-capacitor circuit

An integrated circuit for operating a charge pump circuit having a plurality of pump capacitors along one or more charge transfer paths, the integrated circuit comprising:

• a plurality of terminals respectively coupled to the plurality of pump capacitors;
• a plurality of power switches coupled to the plurality of pump capacitors via the plurality of terminals and forming a charge transfer path between an input port and an output port of the charge pump circuit;
• and
• one or more gate driver circuits including transistors forming a tapered inverter chain for driving the plurality of power switches, wherein each of the one or more gate driver circuits receives one or more non-overlapping gate driver signals;
• a level shifter circuit to shift a voltage level of an input signal before providing the input signal to the one or more gate driver circuits;
• and
• one or more switching elements respectively coupled to the one or more gate driver circuits, wherein any of the one or more switching elements is controlled to operate in a first state or a second state to provide a supply voltage to a corresponding gate driver circuit, the supply voltage switching between different values in response to a state of the corresponding switching element.