Patent ID: 9606555
Date: 2017-03-28
CPC Classifications: G05F,H02M,Y02B

Claim:
1. A control circuit, comprising: a first circuit supplied with a first internal reference voltage and a first power supply voltage and configured to supply current to an output terminal; a first regulator configured to generate the first internal reference voltage; and a second regulator configured to generate a second internal reference voltage, wherein the first regulator and the second regulator each comprise: a differential circuit configured to generate a comparison signal corresponding to a voltage difference between a prescribed reference voltage and a control voltage that is correlated to one of the first internal reference voltage and the second internal reference voltage; a first current source supplying current to the differential circuit; a first current mirror circuit connected to first and second differential output lines, each of which is connected to the differential circuit; a first transistor that outputs the first internal reference voltage based on the comparison signal or the second internal reference voltage based on the comparison signal; a first capacitor; a second transistor configured to control charge and discharge of the first capacitor and to control current flowing to the first differential output line and a gate voltage of the first transistor based on the control voltage; and a second current source supplying current to the second transistor.