This part is a kind of semiconductor called 78L05.

Function of this product has 3-Terminal Positive Regulators.

Manufacturers : National Semiconductor

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LM78LXX Series 3-Terminal Positive Regulators February 2005 LM78LXX Series 3-Terminal Positive Regulators General Description The LM78LXX series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. When used as a zener diode/resistor combination replacement, the LM78LXX usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the LM78LXX to be used in logic systems, instrumentation, HiFi, and other solid state electronic equipment. The LM78LXX is available in the plastic TO-92 (Z) pac [ ... ]

78L05 PDF Datasheet Download