LP3999ITL-3.3 is a type of voltage regulator ideally suited for powering RF/Analog devices. It is designed to meet the requirements of portable wireless battery-powered applications and will provide an accurate output voltage with low noise and low quiescent current. this device will also be used to meet more general circuit requirements. Due to its low dropout and low ground current, it is able to extend the lifetime of the battery for battery-powered applications.