Patent ID: 8237417

Claim:
A DC-DC converter comprising: a control unit that controls a current stored in an inductance and an output voltage output from an output terminal electrically couplable to the inductance; wherein, when the output voltage is lower than a given value in response to a load electrically couplable to the output terminal, the control unit assigns a first period and a second period to a given period, wherein the first period is where a current is stored in the inductance in response to an input voltage and a reference voltage, and the second period is where the current stored in the inductance is supplied to the output terminal in response to the input voltage and the output voltage, wherein, when the output voltage is equal to or higher than the given value, the control unit assigns the first period, the second period, and a third period in which the current stored in the inductance is supplied to the output terminal in response to the output voltage and the reference voltage, to the given period, wherein, when the output voltage is equal to or higher than the given value, the control unit performs either fixing the second period in the given period and controlling the first period and the third period, or fixing the first period in the given period and controlling the second period and the third period.