Voltage boosting device and method for semiconductor device
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United States of America Patent
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May 25, 2010
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app pub date -
Jul 25, 2006
filing date -
Jul 25, 2005
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Abstract
A semiconductor device includes: a pump circuit that boosts an output node connected to a memory cell array; an oscillator that outputs a clock to the pump circuit; and a detection circuit that outputs an actuating signal to the oscillator. In this semiconductor device, the actuating signal actuates the oscillator when the voltage of the output node of the pump circuit is lower than a first reference voltage, and the actuating signal stops the oscillator when the voltage of the output node is higher than a second reference voltage. In accordance with the present invention, when the voltage of the output node of the pump circuit is higher than the target voltage, the oscillator is stopped, and so is the pump circuit. Thus, unnecessary charge flow to the ground can be prevented, and the power consumption of the booster circuit can be reduced.
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