This part is a kind of semiconductor called L78L05ABU.

Function of this product has POSITIVE VOLTAGE REGULATORS.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® L78L00 SERIES POSITIVE VOLTAGE REGULATORS s s s s s s OUTPUT CURRENT UP TO 100 mA OUTPUT VOLTAGES OF 3.3; 5; 6; 8; 9; 12; 15; 18; 24V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION NO EXTERNAL COMPONENTS ARE REQUIRED AVAILABLEIN EITHER ± 5% (AC) OR ± 10% (C) SELECTION SO-8 SOT-89 DESCRIPTION The L78L00 series of three-terminal positive regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heatsink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or on-card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass ele [ ... ]

L78L05ABU PDF Datasheet Download