The PJ78L05SA is a SOT-23 RoHS Linear Voltage Regulator manufactured by PINGJING, a Chinese semiconductor company. It is a low-dropout regulator, designed to regulate an input voltage to a fixed output voltage. It provides a wide input voltage range, operating from 1.5V to 16V, and has a typical output current of up to 100mA. It also has a maximum programmable operating temperature range of -40°C to 125°C, with a maximum storage temperature of 150°C. The device is RoHS compliant and is suitable for applications such as battery management, motor control, and automotive systems.