| 摘要 |
A switching regulator includes a switching transistor to switch in accordance with an input control signal, an inductor charged with an input voltage in response to a switching operation by the switching transistor, a switch signal generator to detect an inductor current flowing through the inductor from a voltage at a connection point between the switching transistor and the inductor and output a predetermined switch signal after a time in accordance with the input voltage when detecting the inductor current is zero, and a controller to perform a PWM control or a PFM control on the switching transistor in accordance with the switch signal output from the switch signal generator to keep an output voltage output from the output terminal at a predetermined constant voltage. The controller performs the PFM control when the predetermined switch signal is continuously input thereto from the switch signal generator one or more times.
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