Patent ID: 6031364
Filing Date: 2000-02-29
Classification: G05F

Abstract:
A series control type regulator comprising:a first transistor for controlling an output voltage, a main current path of which is connected between an input terminal and an output terminal;a detection circuit, which includes a plurality of voltage dividing resistors and a second transistor connected in series, for detecting an output voltage;an error amplifier circuit for supplying an output signal obtained by comparing a detecting voltage corresponding to the output voltage supplied from the detection circuit with a reference voltage, to a control terminal of the first transistor;an output capacitor, one end of which is connected to the output terminal;a discharge circuit having a third transistor, a main current path of which is connected in parallel to the output capacitor; anda switching circuit for setting the first transistor to a state of operation or a state of stop of operation, andwherein when the first transistor is set from the state of operation to the state of stop by the switching circuit, a current flowing to the voltage dividing resistors of the detection circuit is used as a base current of the third transistor by turning off the second transistor, thereby turning on the third transistor and causing the output capacitor to discharge through the third transistor.