This part is a kind of semiconductor called 24A05.
Function of this product has UPC24A05.
Manufacturers : NEC
Image and pinout :

Some of the text within the PDF file :
DATA SHEET SHEET DATA BIPOLAR ANALOG INTEGRATED CIRCUIT µ PC24A00 Series THREE TERMINAL LOW DROPOUT VOLTAGE REGULATOR The µPC24A00 Series is a low dropout voltage three terminal regulator that has realized a minimum voltage differential between the I/O of no more than 1 V when the output current is 2 A through the employment of a PNP transistor at the output stage. Due to its ability to achieve a greater reduction in the power loss compared with conventional three-terminal regulators, the µPC24A00 Series is ideal for use as the secondary side smoothing circuit of a power supply. FEATURES • Output current in excess of 2.0 A • High accuracy of output voltage PIN CONFIGURATION (Marking Side) 3-pin plastic SIP (MP-45G) µPC24A05HF, 24A12HF, 24A15HF ∆ VO = [ ... ]
24A05 PDF Datasheet Download
