Power supply device

A power supply device comprising:

• an output terminal to which a load is connected;
• a first transistor having a first electrode thereof connected to a direct-current supplied voltage and having a second electrode thereof connected to the output terminal;
• a second transistor having a first electrode thereof connected to the direct-current supplied voltage;
• at least two resistors connected in series between the second electrode of the first transistor and a fixed voltage;
• an amplifier receiving at a first input terminal thereof a setting voltage, receiving at a second input terminal thereof a voltage at a node between the at least two resistors, and having an output terminal thereof connected to control electrodes of the first and second transistors, the amplifier controlling the first and second transistors in such a way as to keep the voltage at the node equal to the setting voltage;
• a limiter circuit connected to a second electrode of the second transistor so that, in accordance with a current fed from the second electrode of the second transistor, the limiter controls, through the amplifier, an output current of the first transistor;
• and
• a capacitor connected between the second electrodes of the first and second transistors.