The PJ9193M18SE is a SOT-23-5 RoHS LDO (Low Dropout Regulator) component manufactured by Pingjingsemi. It is designed to provide a highly efficient and reliable switching regulator power supply solution that addresses the need for increased efficiency with reduced energy consumption when powering sensitive devices. It is capable of supplying output voltage of 1.8V, and its low dropout voltage (1.1V) makes it particularly well suited for battery-powered and ultra-low-voltage applications. Additionally, it features precise, programmable output voltage control, good power supply rejection, and reverse current protection. With its low quiescent current, high efficiency, and small size, the PJ9193M18SE is an excellent choice for ultra-portable and low-power devices.