The AT73HL50SC is a three-pin (SOT-23-3L) linear voltage regulator (LDO) manufactured by Agertech that is RoHS compliant. It has an output voltage of 5V that can be controlled using an external resistor, and can provide a current of up to 50mA. It has low dropout voltage, low power consumption, and temperature stability. It also has a fast response time, making it suitable for low-power applications in a wide range of environments, from commercial to industrial. Additionally, it has protection against noise and overcurrent as well as short circuit protection.