Mitsumi Electric Company Ltd.

Chuhei Terada

Yoichi Takano

Disclosed is a semiconductor integrated circuit for a regulator for forming a low current consumption type DC power supply device. The semiconductor integrated circuit includes an output transistor, a control circuit, an operation control transistor and a soft start circuit. The output transistor is connected between an output terminal and a voltage input terminal to which a DC voltage is input. The control circuit controls the output transistor according to a feedback voltage of an output. The operation control transistor controls an operation state of the control circuit. The soft start circuit gradually changes a voltage applied to a control terminal of the operation control transistor and delays activation of the control circuit at a time of applying a power supply voltage to the voltage input terminal.

Semiconductor integrated circuit for a regulator for forming a low current consumption type DC power supply device

Disclosed is a semiconductor integrated circuit for discharging, which includes: a plurality of discharging elements; a plurality of external terminals connected respectively to first terminals of the plurality of discharging elements; and a controlling external terminal which is capable of receiving from an outside a signal indicating that an operation of an internal circuit is enabled/disabled. In response to the signal received at the controlling external terminal or an output signal of a logic circuit that receives the signal being applied to controlling terminals of the plurality of discharging elements, the discharging semiconductor integrated circuit turns on the plurality of discharging elements to draw charges respectively through the plurality of external terminals.

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Isehara, Japan

Chuhei Terada