Power supply circuit and semiconductor device including the same

摘要

A power supply circuit includes a first switch, a voltage regulator circuit connected to the first switch, and a control circuit for controlling the first switch. The control circuit includes a second switch, a third switch, and a voltage generation circuit. For controlling the first switch, first voltage output from the voltage generation circuit is applied to the first switch through the second switch, and second voltage output from the voltage generation circuit is applied to the first switch through the third switch. Power consumption of the power supply circuit can be reduced.

主权项

1. A power supply circuit comprising:
a first switch comprising a first transistor; a voltage regulator circuit connected to the first switch; and a control circuit for controlling the first switch, the control circuit comprising:
an electric storage device connected to the voltage regulator circuit;a voltage generation circuit comprising a first output terminal and a second output terminal;a second switch comprising a second transistor; anda third switch comprising a third transistor, wherein the first transistor includes a semiconductor having a wider band gap than silicon, wherein the electric storage device is connected to the voltage generation circuit at a first node so that power stored in the electric storage device is supplied to the voltage generation circuit, wherein the first output terminal is connected to the first switch through the second switch at a second node, and wherein the second output terminal is connected to the first switch through the third switch at the second node.