Low Voltage Charge Pump with Regulation

A charge pump circuit to generate an output voltage, including:

• a plurality of capacitors, each having a first plate and a second plate;
• switching circuitry, whereby the capacitors are alternately connectable in a first phase, in which the first plate of each of the capacitors is connected to receive a regulator voltage and the second plate of each of the capacitors is connected to ground, and in a second phase, in which the capacitors are connected in series such that for each capacitor after the first in the series the second plate is connected to the first plate of the preceding capacitor in the series and the first plate of the last capacitor in the series is connected to supply the output voltage of the charge pump circuit;
• and
• regulation circuitry connectable to receive a reference voltage and the output voltage from charge pump and to generate from the reference voltage said regulator voltage, wherein the regulator voltage value is responsive to the value of the output voltage.