This part is a kind of semiconductor called AZ1084C.

Function of this product has 5A LOW DROPOUT LINEAR REGULATOR.

Manufacturers : BCD

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Some of the text within the PDF file :

5A LOW DROPOUT LINEAR REGULATOR General Description Features Data Sheet AZ1084C The AZ1084C is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 5A of load current. The series features on-chip thermal limiting which provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. It also includes a trimmed bandgap reference and a current limiting circuit. The AZ1084C is available in 1.5V, 1.8V, 2.5V, 3.3V and 5.0V versions. The fixed versions integrate the adjust resistors. It is also available in an adjustable version which can set the output voltage with two external resistors. The AZ1084C series is available in standard packages of TO-263-3, TO-263-2, TO-252-2 (3) and TO-252-2 (4). [ ... ]

AZ1084C PDF Datasheet Download