The NCP400 is an integration of a low-dropout regulator and a voltage detector in a very small chip scale package. The voltage regulator is capable of supplying 150 mA with a low dropout of 160 mV at 100 mA. It contains a voltage reference unit, an error amplifier, comparators, PMOS power transistor, current limit and thermal shutdown protection circuits for the regulator portion. A highly accurate voltage detector with hysteresis and an externally programmable time delay generator are implemented to prevent erratic system reset operation. It features complementary output with active low reset function.