Patent ID: 7170197

Claim:
A switching converter capable of operating from a first supply voltage and a second supply voltage, comprising: a first high-side switch having a control terminal, an output terminal, and an input terminal capable of receiving the first supply voltage; a second high-side switch having a control terminal, an output terminal, and an input terminal capable of receiving the second supply voltage, wherein the output terminal of the second switch is connected to the output terminal of the first switch; a low-side rectifier, connected between ground and the node formed by the output terminals of the first and second high-side switches; and a control circuit connected to the control terminals of the first and second high-side switches; wherein the control circuit causes a selected one of the first and second high-side switches to switch repetitively between a conductive state and a nonconductive state at a predetermined switching frequency and causes the nonselected one of the first and second high-side switches to remain in a nonconductive state.