Patent ID: 6891427

Claim:
A charge pump type power supply circuit comprising: a first capacitor, a second capacitor and an output coupled to the second capacitor; a first switch, wherein the first switch connects a first terminal of the first capacitor to either of an input voltage or a first terminal of the second capacitor; a second switch, wherein the second switch connects a second terminal of the first capacitor to either of a second terminal of the second capacitor or the input voltage; a control circuit controlling switching of the first switch to allow the first switch to alternatively connect the first terminal of the first capacitor to the input voltage or to the first terminal of the second capacitor, and further controlling switching of the second switch to allow the second switch to alternatively connect the second terminal of the first capacitor to the input voltage or to the second terminal of the second capacitor, two power supply clocks generated in accordance with a system clock and coupled to be provided to the first switch and the second switch, wherein the system clock is provided from outside of the charge pump type power supply circuit and is used for operation other than operating the power supply clock within the charge pump power supply circuit; and the control circuit suspends generation of the two power supply clocks in response to a power save control instruction, suspension of generation of the two power supply clocks occurring one by one.