Patent ID: 9356450
Filing Date: 2016-05-31
CPC Classification: H02J

Claim Text:
1. A power supply circuit for a chipset of a semiconductor device, comprising: a sequence control circuit configured to generate a control signal in response to a main power source; a voltage regulator circuit configured to convert a voltage of the main power source into a supply voltage and to output the supply voltage in response to the control signal; a discharge control circuit configured to generate a discharge signal indicating an operating state of the voltage regulator circuit in response to the control signal; an output discharge circuit configured to discharge an output stage of the voltage regulator circuit in response to the discharge signal; a backup power source configured to store power from the main power source and to supply the stored power to the discharge control circuit and the output discharge circuit when the main power source is interrupted; and an input discharge circuit configured to discharge an input stage of the voltage regulator circuit in response to the discharge signal when the voltage regulator circuit is in an inactive state.