Patent ID: 7821325

Claim:
A charge pump converter comprising: an output terminal configured to be coupled to an output capacitor and form an output voltage on the output capacitor; a plurality of terminals configured to be coupled to a flying capacitor; a first plurality of transistors coupled to receive an input voltage and form a charging current to charge the flying capacitor wherein the first plurality of transistors are operably coupled to be selectively enabled responsively to values of the input voltage during a charging cycle of the charge pump converter; a second plurality of transistors coupled to receive the input voltage and form the charging current to charge the flying capacitor wherein the second plurality of transistors are operably coupled to be selectively enabled during the charging cycle responsively to a difference between the input voltage and values of the output voltage; a third plurality of transistors coupled to receive the input voltage and form a discharge current to discharge the flying capacitor to the output capacitor wherein the third plurality of transistors are operably coupled to be selectively enabled responsively to the values of the input voltage during a discharging cycle of the charge pump converter; and a fourth plurality of transistors coupled to receive the input voltage and form the discharge current wherein the fourth plurality of transistors are operably coupled to be selectively enabled during the discharging cycle responsively to the difference between the input voltage and the values of the output voltage.