This part is a kind of semiconductor called AS2870.

Function of this product has 6.5A Low Dropout Voltage Regulator.

Manufacturers : Sipex Corporation

Image and pinout :

Some of the text within the PDF file :

AS2870 6.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response FEATURES • Adjustable Output Down To 1.2V • Fixed Output Voltages 2.5, 3.3 & 5.0V • Output Current of 6.5A • Low Dropout Voltage 1.1V Typ. • Extremely Tight Load And Line Regulation • Current & Thermal Limiting • Standard 3-Terminal Low Cost TO-220 & TO-263 APPLICATIONS • Powering VGA & Sound Card • Power PCSupplies • SMPS Post-Regulator • High Efficiency “Green” Computer Systems • High Efficiency Linear Power Supplies • Portable Instrumentation • Constant Current Regulators • Adjustable Power Supplies • Battery charger PRODUCT DESCRIPTION The AS2870 are low power 6.5A adjustable and fixed voltage regulators that are very easy to use. It requires only 2 external resi [ ... ]

AS2870 PDF Datasheet Download