Band gap power supply circuit

A band gap power supply circuit comprising:

• a band gap core circuit having a first switch to make up a first current path in which a first resistor is connected in series to the first switch, and to turn on and off an electrical connection between the first resistor and a ground potential, a first rectifier element connected in parallel to the first current path, a second switch to make up a second current path in which a second resistor is connected in series to the second switch, and to turn on and off an electrical connection between the second resistor and the ground potential, and a second rectifier element to make up a current path in which a third resistor is connected in series to the second rectifier element, the current path being connected in parallel to the second current path, to perform control in such a way that a sum of a current flowing through the first rectifier element and a current flowing through the first current path becomes equal to a sum of a current flowing through the second rectifier element and a current flowing through the second current path, and a sum of a forward direction voltage of the second rectifier element and a voltage drop across the third resistor becomes equal to a forward direction voltage of the first rectifier element;
• and
• a switch control circuit to control the first switch and the second switch from off to on at a time of a startup of a power supply to supply a power supply voltage.