| 摘要 |
A switching regulator includes first and second transistors, which are provided in series between power sources respectively having first and second potentials, and which convert a direct current voltage of a potential difference between the first and the second potentials into an alternating current voltage, and a control circuit. The control circuit includes a comparator which compares the alternating current voltage and a threshold voltage in a period when the second transistor is to be on, and receives a predetermined voltage, at least immediately before the period in which the second transistor is to be on, the predetermined voltage being farther than a midpoint potential of the first and second potentials from the threshold voltage. The control circuit performs control such that the second transistor becomes turned off, when the comparator judges that the alternating current voltage has exceeded the threshold voltage toward the midpoint potential direction, in the period when the second transistor is to be on.
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