Patent ID: 7843256

Claim:
An internal voltage generator, comprising: a pull-up driver to pull-up drive a supply terminal of an internal voltage; a pull-down driver to pull-down drive the supply terminal of the internal voltage; a pull-up driving control means to turn on the pull-up driver when a first feedback voltage corresponding to the internal voltage is lower than a reference voltage; and a pull-down driving control means including: a test unit to generate selection signals, the test unit including a signal generating unit to generate a plurality of test signals and a decoding unit to enable one of the selection signals by decoding the plurality of test signals, the signal generating unit including first to N th signal generating units to either enable a corresponding test signal by sensing an address input in a test mode, or to enable the corresponding test signal regardless of inputs when a fuse option is set up; a feedback unit to transfer a voltage level selected from a plurality of voltage levels corresponding to the internal voltage to a second feedback voltage in response to the selection signals; and a control signal generating unit to turn on the pull-down driver when the second feedback voltage level is higher than that of the reference voltage.