Patent ID: 7495981

Claim:
An internal voltage generator, comprising: an output node; a bit line precharge voltage generating unit for generating a bit line precharge voltage; a first voltage drop unit for dropping the voltage level of the bit line precharge voltage by a first voltage level in a normal mode to output the dropped voltage to the output node; a second voltage drop unit for dropping the voltage level of the bit line precharge voltage by a second voltage level in a power down mode to output the dropped voltage to the output node, the second voltage level being greater than the first voltage level, the second voltage drop unit including a plurality of voltage drop transistors connected in parallel between the output node and the bit line precharge voltage generating unit; a first control unit for controlling the first voltage drop unit in response to a mode determining signal; and a second control unit for controlling the second voltage drop unit in response to a plurality of transistor select signals for driving the plurality of voltage drop transistors, wherein the first control unit turns off the first voltage drop unit in power down mode.