A charge pump circuit and a charge-pumping method are provided to increase an operating speed by generating previously a first boosting signal in response to a command signal before activating a sensing signal. A first boosting unit(120) outputs a first boosting signal of an intermediate voltage level by performing a pumping operation in response to a command signal. A sensing unit(112) outputs a sensing signal(det) when a voltage level of an output node is lower than a voltage level of a target voltage in response to the command signal. A final boosting unit(130) performs a charge-pumping operation for boosting the voltage level of the output node to a final boosting voltage level higher than the intermediate voltage level and the voltage level of the target voltage in response to the sensing signal and the first boosting signal.
