.The PJ73AL36SQ is a SOT-89 RoHS-compliant Low Dropout Regulator (LDO) manufactured by Pingjingsemi. It is designed to be used in linear applications such as portable consumer electronics, automotive, and industrial electronics. The device has an operating voltage between 2.5–15V with output current up to1.5A. It offers high precision output voltage accuracy, especially when operating at very low dropout voltages, low temperature coefficient, and fast transient response. The device also has an EN/TR shutdown feature to enable or disable the regulator output. This feature minimizes power consumption when load currents are low or when the system is in standby. The PJ73AL36SQ offers protection features including thermal shutdown and overcurrent protection.