The 78D12AL-TN3-R is an adjustable linear voltage regulator with a TO-252-2 (DPAK) surface-mount packaging and a RoHS-compliance rating, manufactured by Unisonic Technologies. It has a wide range of input voltages from 2.25V to 18V, and a maximum output current of 300mA with an output voltage range from 1.25V to 15V. This device features low dropout voltage, thermal shutdown, overcurrent protection, short circuit protection, and reverse polarity protection. The 78D12AL-TN3-R is ideal for use in a variety of applications, including powering portable device circuits, low-voltage circuitry, and battery-powered applications.