Abstract: An output signal from a driver is provided to an output unit which includes first and second transistors to output a drive signal for driving a power device. A control signal is supplied from a control signal supply. The control signal indicates an enabled state and a disabled state to control the first and second transistors. The control signal is provided to a voltage output circuit. An output signal from the voltage output circuit is provided to a voltage hold circuit. The first and second transistors are turned off by a disable circuit when the control signal is in the disabled state. A shutdown circuit operates to draw out current from an output terminal of the output unit based on a signal provided from the voltage hold circuit and the control signal when the control signal is in the disabled state.

Abstract: A semiconductor integrated circuit includes: a power supply circuit; a voltage-current conversion circuit connected with an output of the power supply circuit, the voltage-current conversion circuit having an output terminal; a current-voltage conversion circuit connected with the output terminal of the voltage-current conversion circuit, the current-voltage conversion circuit having an output terminal; a constant-voltage line connected with the output terminal of the current-voltage conversion circuit; an output circuit which has an output terminal to which an external element is connected at a rear stage thereof; and a protection circuit which receives a potential of the constant-voltage line and the output signal from the power supply circuit to control a potential of the output terminal, and prevents the external element from operating when an increase in the potential of the constant-voltage line is insufficient or the power supply voltage is not in a steady state.

Abstract: A semiconductor integrated circuit includes: a power supply circuit; a voltage-current conversion circuit connected with an output of the power supply circuit, the voltage-current conversion circuit having an output terminal; a current-voltage conversion circuit connected with the output terminal of the voltage-current conversion circuit, the current-voltage conversion circuit having an output terminal; a constant-voltage line connected with the output terminal of the current-voltage conversion circuit; an output circuit which has an output terminal to which an external element is connected at a rear stage thereof; and a protection circuit which receives a potential of the constant-voltage line and the output signal from the power supply circuit to control a potential of the output terminal, and prevents the external element from operating when an increase in the potential of the constant-voltage line is insufficient or the power supply voltage is not in a steady state.