Semiconductor device

A semiconductor device comprising:

• a first terminal inputting a first voltage from outside the semiconductor device;
• a drive unit using the first voltage as a power supply voltage and outputting a drive signal;
• a switching device driven by the drive signal;
• a second terminal separated from the first terminal and inputting a second voltage;
• a comparator using a voltage generated from the second voltage as a power supply voltage and outputting an output signal when a voltage generated from the first voltage is less than or equal to a reference potential, the voltage generated from the first voltage being applied to an input terminal of the comparator;
• and
• a shut-off switch shutting off a transmission of the drive signal to the switching device from the drive unit in response to the output signal, wherein
• the second voltage is a microcontroller (MICON) signal input from a system MICON located outside the semiconductor device.