VPP GENERATING CIRCUIT FOR GENERATING VPP IN STABLE LEVEL UNDER WIDE RANGE VCC AND SEMICONDUCTOR MEMORY DEVICE HAVING THE SAME

摘要

A VPP generating circuit for generating a VPP in a stable level under a wide range VCC and a semiconductor memory device having the same are provided to have a stable level as to the wide range VCC, by reducing overshoot of the VPP due to a second boosting pump. According to a VPP generating circuit, a boosting level detection part(110) generates a target level detection signal and a margin level detection signal. The target level detection signal has a logic state according to the level of the boosting voltage as to a target voltage level, and the margin level detection signal has a logic state according to the level of the boosting voltage as to a margin voltage level higher than the target voltage level. A first boosting pump(130) generates the boosting voltage by pumping a power supply voltage, and the pumping of the first boosting pump is controlled by the target level detection signal. A second boosting pump(150) generates the boosting voltage by pumping the power supply voltage, and the pumping of the second boosting pump is controlled by the margin level detection signal.