Kabushiki Kaisha Toshiba

Toshiba Electronic Devices & Storage Corporation

Hibiki Otsu

Shuji Toda

According to one embodiment, a semiconductor device includes a first terminal, a second terminal, and a first circuit. The first circuit includes a first switch element having a first end coupled to a first node to which a first voltage is supplied, a second end coupled to the first terminal, and a gate coupled between the first node and the second terminal, and a second switch element coupled between the first node and the first terminal. The first circuit is configured to switch the first switch element from OFF state to ON state when supply of the first voltage is interrupted, and switch the second switch element from OFF state to ON state while maintaining the first switch element in ON state when a voltage of the first terminal changes to a second voltage.

Semiconductor device

According to an embodiment, an input-voltage control circuit outputs an input voltage when a control signal is in an enabled state. A backflow prevention circuit includes a first transistor and a first body diode. The first transistor turns on to output the input voltage to the input-voltage control circuit when the control signal is in the enabled state. The first body diode is formed in the first transistor and having an anode connected to the first terminal of the first transistor and a cathode connected to a second terminal of the first transistor. The booster circuit receives the input voltage outputted from the input-voltage control circuit and boosts the input voltage to generates a boosted voltage. The boosted voltage is outputted from the driver circuit and supplied to the control terminal of an external output transistor.

Driver circuit

An input circuit according to an embodiment includes an input terminal, a power terminal, an internal circuit, an input section, a power supply section, and a first circuit. The input section includes first and resistive parts, and a first transistor. The first resistive part is connected to the input terminal. The second resistive part is connected to the first resistive part. The gate of the first transistor is connected to the first resistive part. The first circuit includes a fifth resistive part and a third transistor. The fifth resistive part is connected to the second resistive part and a grounding line. The gate and one end of the third transistor are connected to the second resistive part. The other end of the third transistor is connected to the grounding line.

Growing community of inventors

Kawasaki Kanagawa, Japan

Hibiki Otsu