Abstract: Provided is a power supply system including a plurality of linear power supply devices. Each of the linear power supply devices includes an output transistor having a first main electrode that is connectable to an application terminal of an input voltage and a second main electrode that is connectable to a first feedback resistor, the first feedback resistor and a second feedback resistor being connected to each other in series, an error amplifier to which a reference voltage and a feedback voltage that is generated at a node to which the first feedback resistor and the second feedback resistor are connected are input, the error amplifier being capable of driving a control terminal of the output transistor, an output terminal, and an electrode pad.