Patent ID: 9729048
Date: 2017-08-08
CPC Classifications: H02M

Claim:
1. A charge pump comprising: a mode control circuit configured to operate the charge pump in a selected mode chosen from a plurality of modes; a clock generation circuit configured to generate a charge pump clock signal having an oscillation frequency that is based on the selected mode, the charge pump clock signal having a first phase and a second phase; two or more switched capacitors including a first switched capacitor and a second switched capacitor; and a capacitor charging circuit configured to charge the two or more switched capacitors based on a power high supply voltage of the capacitor charging circuit and on timing of the charge pump clock signal, the capacitor charging circuit configured to charge a first end of the first switched capacitor with the power high supply voltage and a second end of the first switched capacitor with a power low supply voltage during the first phase, and to charge a first end of the second switched capacitor with the power high supply voltage and a second end of the second switched capacitor with the power low supply voltage during the second phase, the power high supply voltage having a voltage level that is based on the selected mode.