The NCP1117 series are low dropout positive voltage regulators that are capable of providing an output current that is in excess of 1.0 A with a maximum dropout voltage of 1.2 V at 800 mA over temperature. This series contains nine fixed output voltages of 1.5 V， 1.8 V， 1.9 V， 2.0 V， 2.5 V， 2.85 V， 3.3 V， 5.0 V， and 12 V that have no minimum load requirement to maintain regulation. Also included is an adjustable output version that can be programmed from 1.25 V to 18.8 V with two external resistors. On chip trimming adjusts the reference/output voltage to within ±1.0% accuracy. Internal protection features consist of output current limiting， safe operating area compensation， and thermal shutdown. The NCP1117 series can operate with up to 20 V input. Devices are available in SOT?223 and DPAK packages.