Overcurrent protection circuit, semiconductor device, electronic apparatus, and vehicle

An overcurrent protection circuit that limits a current to be monitored based on a current limit signal, comprising:

• a first transistor and a second transistor configured to form an amplifier input stage that receives input of a detection signal according to the current to be monitored;
• a third transistor configured to generate a current output signal according to a difference between the detection signal and a reference signal, and configured to form an amplifier output stage that inputs the current output signal as a negative feedback to the amplifier input stage;
• and
• a current mirror circuit configured to generate the current limit signal by replicating a signal based on the current output signal,
• wherein the current mirror circuit includes a fourth transistor, a fifth transistor, a source follower circuit, and a first current source,
• wherein a gate of the source follower circuit is connected to an input end of the current mirror circuit, and a source of the source follower circuit is connected to a gate of the fourth transistor and a gate of the fifth transistor, and
• wherein the first current source is configured to control a value of a discharging current that discharges the gate of the fourth transistor and the gate of the fifth transistor.