Patent ID: 7994759

Claim:
A method for driving a power supply device, comprising: in the power supply device, providing a first voltage regulator that is coupled with a first voltage output adapted to supply a first power voltage to a client device, wherein the first voltage regulator comprises: a first diode having a first electrode and a second electrode, the second electrode being connected with the first voltage output; and a first switch coupled between the first electrode and a first reference voltage; in the power supply device, providing a second voltage regulator that is coupled with a second voltage output adapted to supply a second power voltage to the client device, wherein the second voltage regulator comprises: a second diode having a third electrode and a fourth electrode, the fourth electrode being coupled with the second voltage output; a second switch coupled between the third electrode and a second reference voltage; and an inductor having a first end terminal and a second end terminal, wherein the first end terminal is coupled with the first electrode of the first diode, and the second end terminal is coupled with the third electrode of the second diode; receiving an activation signal indicative of an initial activation of the power supply device; and in response to the activation signal, concurrently turning off the first switch and turning on the second switch, whereby forming an equivalent shunting circuit coupled between the first voltage output and the second reference voltage.