| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To allow an output voltage to immediately return to an original value even when the output voltage is greatly varied. <P>SOLUTION: A circuit compares a feedback voltage V1 derived from a voltage division point that carries out resistive voltage dividing of an output voltage Vout with a reference voltage Vref to control the output voltage Vout to be a voltage corresponding to the reference voltage Vref on the basis of a result of the comparison. The circuit includes: a series circuit including a capacitor C2 and a switch device SW, connected between an output terminal and the voltage division point; and a comparison circuit OP2 outputting a detection signal when detecting that a voltage acquired by adding the feedback voltage V1 and the offset voltage Voff becomes less than the reference voltage Vref. The switch device SW turns off the power when the comparison circuit OP2 outputs the detection signal, and turns on the power when the comparison circuit does not output the detection signal. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
