Switching regulator

A switching regulator comprising:

• two input terminals to which a direct-current voltage is applied;
• two output terminals;
• a reactor;
• a capacitor disposed between the output terminals and charged with a supply current from the reactor;
• a switching circuit having a first operation state in which the direct-current voltage is supplied to two ends of the reactor through the input terminals and a second operation state in which at least the reactor and a load connected between the output terminals form a closed circuit, the switching circuit switching an operation state between the first operation state and the second operation state;
• and
• a control circuit controlling an operation ratio of the first operation state and the second operation state in the switching circuit,
• wherein the control circuit includes a reference command value generation portion and an additional command value generation portion,
• wherein the reference command value generation portion generates a reference command value based on a deviation of an output voltage, which is a voltage across the output terminals, from a predetermined command voltage,
• wherein the additional command value generation portion generates an additional command value based on a difference between outflow electric energy and inflow electric energy, the outflow electric energy is a value reflecting a supply power from the capacitor to the load, the inflow electric energy is a value reflecting a supply power from the reactor to the capacitor, and
• wherein the control circuit controls the operation ratio based on the reference command value and the additional command value such that the smaller the output voltage becomes compared with the command voltage and the larger the outflow electric energy becomes compared with the inflow electric energy, the larger a ratio of the first operation state becomes.