The PJ9193M30SE is a surface-mount, SOT-23-5, RoHS-compliant, three-terminal, low-dropout (LDO) regulator manufactured by Pingjingsemi. It has a maximum output current of 300mA and an input voltage range of 1.2V - 10.0V. The output voltage is adjustable from 1.25V to 9.0V with a high accuracy of ±2%, and it features a fast transient response time of 3.5µs. It has a high efficiency of up to 90%. It has a low quiescent current of 20 µA, and its features include low noise, fast start-up, over-current protection, and over-temperature protection.