Reference voltage generation circuit

A reference voltage generation circuit, including a stabilizing capacitor, outputting a voltage at both ends of the stabilizing capacitor as an output voltage, comprising:

• a reference voltage circuit including transistors connected by cascode connection, being configured to set a voltage at both ends of the charged stabilizing capacitor to the reference voltage;
• a voltage detection circuit configured to detect the output voltage relative to a detection voltage, the detection voltage being lower than the reference voltage;
• and
• a current source circuit connected to the voltage detection circuit and configured to generate a current with which the stabilizing capacitor is charged and to vary the current generated in accordance with a detection by the voltage detection circuit;
• a control circuit configured to switch the reference voltage circuit between a non-operation state and an operation state,
• the current source circuit being configured to generate a first current if the output voltage is lower than the detection voltage as detected by the voltage detection circuit and a second current if the output voltage is higher than or equal to the detection voltage as detected by the voltage detection circuit, the first current being larger than the second current,
• the voltage detection circuit including one of a single transistor and transistors connected by cascode connection that has a number of stages smaller than the number of cascode connection stages in the reference voltage circuit.