The AT1117 is a positive low dropout regulator designed to provide up to 1A of output current. The device is available in an adjustable version and fixed output voltages of 1.5V to 5V. All internal circuitry is designed to

operate down to 1.2V input to output differential. Dropout voltage is guaranteed at a typical of 1.2V at 1A, decreasing at lower load currents.On chip trimming adjusts the reference/output voltage to within ±2%. Current limit
is also trimmed in order to minimize the stress on both the regulator and the power source circuitry
under overload conditions. The low profile surface mount SOT-89, SOT-223 and TO-252 package allows the device to be used in applications where space is limited. The AT1117 requires an output capacitance forstability.Output  stability.Output capacitors of this size or larger are normallyincluded in most regulator designs.

二 特性

*3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5V Output Current of 1A

*Guaranteed Dropout Voltage at Multiple Current Levels
*Fast Transient Response
*Built-in Thermal Limiting
*Good Noise Rejection
*Compatible with tantalum capacitor,electrolytic Capacitor and MLCC