The PJ71K30SQ is a linear voltage regulator, manufactured by Pingjingsemi, and packaged in an SOT-89 RoHS compliant package. It is a low drop out (LDO) regulator with a wide input voltage range of 8 V to 40 V and a rated output voltage of 3.3 V. It has a typical line regulation of 0.3 % and a typical load regulation of 0.4 %. The maximum output current is 150 mA at 25°C. It has a low operating current at 3.5 mA and a low shutdown current of 0.7 µA. The temperature range is between -40°C and 125°C, and has an output noise of 90 mV (VIN = 8 V and Io = 8 mA). It also has built-in protection features including thermal shutdown and current limit protection, providing safe and reliable operation under abnormal operating conditions. The PJ71K30SQ is ideal for applications such as industrial or automotive power supplies, appliance power supplies, and lighting systems.