The LP3989AB5F is a low dropout (LDO) voltage regulator with SOT23-5 RoHS package manufactured by LOWPOWER. It is a low quiescent current LDO, suitable for powering low power applications such as low power µPs, analog-control and signalling Circuits. It features low quiescent current (50µA) and high efficiency, and provides full protection functions like over-current, over-temperature, reverse current, external voltage, under-voltage and power-good detection. It also has a wide input voltage range (1.8V to 7.0V) to meet various application needs, making it ideal for various types of power supply systems.