Patent ID: 8587265

Claim:
A DC-DC converter control circuit comprising: a slope signal generation circuit that generates a reference voltage by superimposing a slope voltage onto a standard voltage; a comparator that performs comparison of the reference voltage with an output voltage and generates a comparator output signal according to a result of the comparison, a not-inverting input terminal of the comparator coupled to the reference voltage and an inverting input terminal of the comparator coupled to the output voltage; an oscillator that generates a pulse signal with a substantially constant cycle; a control signal generation circuit that generates a control signal that controls to turns on a switch based on the comparator output signal and turns off the switch based on the pulse signal; and a voltage correction circuit that corrects the reference voltage according to one of an input voltage and a differential voltage of the input voltage and the output voltage, wherein the control signal generation circuit includes a RS flip-flop circuit having a set terminal coupled to an output of the comparator and a reset terminal coupled to an output of the oscillator, wherein the RS flip-flop circuit is set by supplying the output of the comparator to the set terminal and is reset by supplying the output of the oscillator to the reset terminal, wherein the slope signal generation circuit controls the slope amount so that a slope voltage increase rate becomes larger than an output voltage increase rate according to one of the input voltage and the differential voltage of the input voltage and the output voltage, wherein the voltage correction circuit decreases the reference voltage when the slope voltage increase rate becomes larger than the output voltage increase rate.