Patent ID: 7304531

Claim:
An internal voltage generator comprising: a charge pumping unit for pumping an external voltage to generate a high voltage higher than the external voltage; a level detecting unit for detecting a level drop of the high voltage with respect to a reference voltage and outputting a detection signal; an oscillating unit for generating an oscillation signal in response to the detection signal; a pumping control signal generating unit for controlling a driving of the charge pumping unit in response to the oscillation signal; and a charge pump controlling unit for precharging the charge pumping unit by detecting a driving end of the charge pumping unit and for initializing the charge pumping unit by detecting a driving start of the charge pumping units, wherein the charge pump controlling unit includes: a first control signal generating unit for generating first and second precharge control signals to open a path where a leakage current occurs in the charge pumping unit; and a second control signal generating unit for generating first and second initialization control signals to initialize the charge pumping unit.