Texas Instruments Corporation

Vadium V Ivanov

Rodney T Burt

Thomas Lloyd Botker

Haoran Zhang

A charge pump circuit is configured for charging of parasitic capacitances associated with charge pump capacitors in a manner that minimizes voltage ripple. The charge pump circuit is suitably configured with an independent charging circuit configured for supplying the current needed to charge the parasitic capacitances, rather than utilizing the reservoir capacitor to supply the needed current. The independent charging circuit can be implemented with various configurations of charge pump circuits, such as single phase or dual phase charge pumps, and/or doubler, tripler or inverter configurations. The independent charging circuit includes a parasitic charging capacitor or other voltage source configured with one or more switch devices configured to facilitate charging of the parasitics during any phases of operation of the charge pump circuit. In addition, the independent charging circuit includes an independent cell, and is local to charge pump circuit for supplying the current for charging the parasitic capacitances, instead of having the current supplied through external bussing or wire bonds.

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Tucson, AZ, United States of America

Vadium V Ivanov