Patent ID: 7439798
Filing Date: 2008-10-21
Classification: G05F

Abstract:
1. A regulator circuit, comprising: a control signal, driven by a power source having a first voltage level and controlling an operation and a halt of a regulator circuit; a detection circuit, outputting a feedback voltage in accordance with an output voltage; a reference voltage input section; a feedback voltage input section; an operational amplification circuit, comparing a reference voltage and the feedback voltage and outputting a voltage as a comparison result; an output circuit, supplying an output voltage from a power source having a second voltage level which is higher than the first voltage level in accordance with the output of the operational amplification circuit; a level shift circuit, voltage converting the control signal to the second voltage level; a connection/disconnection circuit, controlled by an output of the level shift circuit, and connecting or disconnecting an output terminal of the detection circuit and the feedback voltage input section; and a voltage setup circuit, setting for the feedback voltage input section a predetermined voltage, wherein the control signal is comprised of a first control signal for controlling the detection circuit and a second control signal for controlling the level circuit, and wherein after a predetermined time elapses since the detection circuit is operated by the first control signal, the connection/disconnection circuit is controlled so as to connect the output terminal of the detection circuit and the feedback voltage input section by controlling the level shift circuit by the second control signal.