Patent ID: 8040700

Claim:
A method, comprising: providing circuitry for monitoring a synchronous load by using a first voltage threshold below a target output voltage of a charge pump and a second voltage threshold above the target output voltage; providing an output terminal of the charge pump for providing an output voltage and being coupled to the synchronous load; demanding charge from the charge pump by clocking the synchronous load; upon detecting a passing of the target output voltage below the first voltage threshold, storing a first value representing a present size of a charging capacitance as a stored first value and using a second stored value representing a needed changed size of the charging capacitance; changing the present size of the charging capacitance in response to the passing of the target output voltage below the first voltage threshold; reducing demand for charge from the synchronous load; and upon detecting a passing of the target output voltage above the second voltage threshold, storing a third value representing a present size of the charging capacitance as the second stored value, replacing the third value representing the present size of the charging capacitance with the stored first value, and using the stored first value to change the present size of the charging capacitance.