| 摘要 |
A switching regulator converts an input voltage into an output voltage, wherein an operation of the switching regulator is stopped by an enable signal in a standby status. The switching regulator includes a switching transistor performing switching in accordance with a control signal; an inductor that is charged with the input voltage by the switching transistor; a rectifying transistor including a bipolar transistor discharging the inductor when the switching transistor is turned off; a control circuit unit controlling the switching transistor such that a voltage proportional to the output voltage becomes equal to a reference voltage; and a rectifying transistor control circuit unit turning off the rectifying transistor in a cut-off state upon reception of the enable signal indicating the standby status or connecting a base and a collector of the rectifying transistor upon reception of the enable signal indicating a normal operation so that a diode is formed.
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