Patent ID: 7394673

Claim:
A switching power supply apparatus comprising: a first charge pump circuit for converting input voltage into a predetermined voltage, to be outputted as a first output voltage; a second charge pump circuit for converting the first output voltage, outputted from the first charge pump circuit, into a predetermined voltage, to be outputted as a second output voltage; and a control circuit for controlling a charge-discharge state of the first and second charge pump circuits; wherein the first charge pump circuit includes a first flying capacitor and a first output capacitor, the second charge pump circuit includes a second flying capacitor and a second output capacitor; and wherein the control circuit simultaneously implements a state in which the first output capacitor of the first charge pump circuit is charged and a state in which the second flying capacitor of the second charge pump circuit is charged, or simultaneously implements a state in which the first flying capacitor of the first charge pump circuit is charged and a state in which the second output capacitor of the second charge pump circuit is charged.