| 摘要 |
A semiconductor integrated circuit (2), provided with a charge pump circuit (9) of low power consumption, maintains an output voltage (VOUT) thereof at a predetermined voltage level without causing current consumption to undergo intermittent variation, and a contactless electronic device (1) using the semiconductor integrated circuit (2). With respective charge pump circuit unit cells (15,19), charge current/discharge current is controlled according to the output voltage (VOUT) of the charge pump circuit (9). The charge pump circuit (9) can maintain the output voltage (VOUT) thereof at the predetermined voltage level without undergoing an intermittent action. The charge current and discharge current are supplied from power supply terminals (PA,PB) of a power supply circuit (3), current control is executed by a transistor, and a voltage outputted according to the output voltage (VOUT) of the charge pump circuit (9) is supplied to the gate of the transistor.
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