Semiconductor device, electronic apparatus and vehicle

A semiconductor device, comprising:

• a semiconductor substrate of a first conductivity type;
• a well of a second conductivity type different from the first conductivity type, formed in the semiconductor substrate;
• an output terminal, configured to be electrically connected to the semiconductor substrate;
• a ground terminal, configured to receive a ground voltage;
• a detection signal generating circuit, configured to generate a negative current detection signal when an output voltage present at the output terminal is detected to be less than the ground voltage or a threshold voltage;
• and
• a control circuit, configured to switch between applying the ground voltage or the output voltage to the well in response to the negative current detection signal, wherein
• the detection signal generating circuit includes:
• a comparator, configured to generate the negative current detection signal by comparing an output detection voltage with the ground voltage or the threshold voltage;
• a bias circuit, configured to switch between applying the output voltage or a bias voltage as the output detection voltage;
• and
• a clamp circuit, configured to operate when an absolute value of the output detection voltage is greater than a clamp operation voltage.