The AT73HL50SQB with SOT-89-3L is a Linear Voltage Regulator (LDO) ROHS manufactured by Agertech. It is a three-terminal, low dropout voltage regulator. It is designed to provide a constant output voltage within a wide input voltage range. The device is rated to provide a maximum output current of 50 mA and can sustain operation up to an input voltage of 30 V. It also includes two 3.3 ohm resistors, for protection against reverse current if needed. It also features a low dropout voltage, fast turn on response, low quiescent current, and low power consumption. The device is suitable for a wide variety of applications, including but not limited to laptop computers, mobile phones, medical instruments, and consumer electronics.