This part is a kind of semiconductor called 78M05.
Function of this product has 0.5A THREE TERMINAL POSITIVE VOLTAGE REGULATORS.
Manufacturers : Toshiba Semiconductor
Image and pinout :
Some of the text within the PDF file :
TA78M05,06,08,09,10,12,15,18,20,24F TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA78M05F,TA78M06F,TA78M08F,TA78M09F,TA78M10F TA78M12F,TA78M15F,TA78M18F,TA78M20F,TA78M24F Output Current of 0.5 A, Three-Terminal Positive Voltage Regulators 5 V, 6 V, 8 V, 9 V, 10 V, 12 V, 15 V, 18 V, 20 V, 24 V Features z Suitable for CMOS, TTL and the power supply of the other digital ICs z Internal overheating protection. z Internal overcurrent protection. z Maximum output current of 0.5 A. z Packaged in New PW-Mold (Surface-mount type). Pin Assignment Marking side HSOP3-P-2.30D Weight HSOP3-P-2.30D: 0.36 g (typ.) 1 IN Marking 3 G ND (CAS E) 2 OUT 3 TA78M**F 12 Note 1: A line under a Lot No. identifies the indication of product Labels. Product No. (or abbreviation code) Not under [ ... ]