This part is a kind of semiconductor called IL1117-1.8.

Function of this product has Low Dropout Voltage Regulators.

Manufacturers : IK Semiconductor

Image and pinout :

Some of the text within the PDF file :

m TECHNICAL DATA 1.0A LtoawShDereot4pUo.uctoPositive Voltage Regulator IL1117-xxFeatures SOT-223 .Da● Adjustable and Fixed of 1.2, 1.25, 1.5, 1.8, 2.5, 2.85, 3.3, 5.0V w● Space saving SMD types of SOT-223 w● 1.2V Drop-out Voltage w ● 1.0A Output Current ● Line Regulation Typically at 0.2% max ● Current Limiting and Thermal Protection mTO-252 TO-220 1. ADJ/GND 2. Output 3. Input TO-263 et4U.coGeneral Description eThe IL1117 is a series of low dropout voltage regulators which can provide hup to 1A of output current. The IL1117 is available in seven fixed voltage, 1.2, 1.25, 1.5, 1.8, 2.5, 2.85, 3.3 and 5.0V. Additionally it is also available in Sadjustable version. On chip precision trimming adjusts the reference/ output voltage to within ± 2%. Current limit is also trimme [ ... ]

IL1117-1.8 PDF Datasheet Download