A circuit comprising: - a charge pump with an input voltage (V R) and an output voltage (V CP) which is a multiple N of the input voltage (V R), the charge pump having a clock input, - an input stage with a reference terminal for receiving a reference voltage (V REF) and an output terminal coupled to the charge pump for applying the input voltage (V R) to the charge pump, - at least one output capacitance (C OUT) coupled (14, 16) to the charge pump and chargeable to an output voltage (V OUT) of the circuit, wherein the input stage comprises: - a first differential feedback input having a first terminal coupled to the reference terminal, a second terminal coupled to the output (V CP) of the charge pump and a first output terminal, - a second differential feedback input having a first terminal coupled to the reference terminal, a second terminal coupled to the output capacitance (C OUT) and a second output terminal, and - a summing node coupled to the first and second output terminal of said first and second differential feedback input in such a way that the input voltage (V R) applied by the input stage to the charge pump is a function of the feedback signals on said first and second differential feedback input of the input stage, the circuit comprising: - a feedback network (14, 16) comprising a first feedback loop for feeding back the output voltage (V CP) of the charge pump towards the first differential feedback input of the input stage and a second feedback loop (16a, 16b, 16c) configured to act on the second differential feedback input of the input stage for maintaining a fixed offset between the output voltage (V CP) of the charge pump and the output voltage (V OUT) of the circuit. - a charge pump with an input voltage (V R) and an output voltage (V CP) which is a multiple N of the input voltage (V R), the charge pump having a clock input, - an input stage with a reference terminal for receiving a reference voltage (V REF) and an output terminal coupled to the charge pump for applying the input voltage (V R) to the charge pump, - at least one output capacitance (C OUT) coupled (14, 16) to the charge pump and chargeable to an output voltage (V OUT) of the circuit, - a first differential feedback input having a first terminal coupled to the reference terminal, a second terminal coupled to the output (V CP) of the charge pump and a first output terminal, - a second differential feedback input having a first terminal coupled to the reference terminal, a second terminal coupled to the output capacitance (C OUT) and a second output terminal, and - a summing node coupled to the first and second output terminal of said first and second differential feedback input in such a way that the input voltage (V R) applied by the input stage to the charge pump is a function of the feedback signals on said first and second differential feedback input of the input stage, - a feedback network (14, 16) comprising a first feedback loop for feeding back the output voltage (V CP) of the charge pump towards the first differential feedback input of the input stage and a second feedback loop (16a, 16b, 16c) configured to act on the second differential feedback input of the input stage for maintaining a fixed offset between the output voltage (V CP) of the charge pump and the output voltage (V OUT) of the circuit.