Switching regulator providing slope compensation and voltage control method thereof

A switching regulator of a current-mode control type converting an input voltage input to an input terminal into a voltage proportional to a set reference voltage and outputting the voltage from an output terminal, the switching regulator comprising:

• a switching element configured to perform switching in accordance with a control signal input to a control electrode of the switching element so as to perform output control of the input voltage;
• a smoothing circuit configured to smooth an output voltage of the switching element and output the smoothed output voltage to the output terminal;
• a voltage divider circuit configured to divide the voltage at the output terminal with a predetermined ratio;
• an error amplifier circuit configured to amplify a voltage difference between the reference voltage and an output divided voltage of the voltage divider circuit;
• a slope voltage generator circuit configured to generate a slope voltage according to the reference voltage, correct an inclination of a slope of the slope voltage in accordance with a voltage difference between the input voltage and the voltage at the output terminal, detect a current flowing through the switching element and generate a voltage according to the detected current, and add up and output the generated voltage and the corrected slope voltage;
• a pulse generator circuit configured to generate and output a pulse signal having time width according to an output voltage of the error amplifier circuit and the output voltage of the slope voltage generator circuit;
• and
• a switching controller circuit configured to control the switching of the switching element in accordance with the output pulse signal of the pulse generator circuit.