The AP2121AK-2.5TRE1 with LDO Voltage Regulators 200mA CMOS LDO 2.5V 150mV is a low-dropout voltage regulator, manufactured by Diodes Incorporated. The device is a monolithic CMOS voltage regulator designed to provide an output voltage of 2.5V and a current limit of 200 mA. It features a maximum dropout of 150 mV at 200 mA, a low dropout voltage, and a ±3% accuracy over line, load, and temperature. It is designed to operate over an input voltage range of 2.5V to 12V and features over-temperature, over-voltage, and short-circuit protection. The device is packaged in QFN3 package.