78L05 is a fixed voltage (5V) three-terminal integrated voltage regulator, which is suitable for many applications involving a single point as the occasion requires regulators to limit noise and distribution problems to solve in - .. card regulation and in addition they can also be other power transfer device together constitute a large current power supply, as can drive up to 100 mA of output current regulator. their excellent internal current limiting and thermal shutdown features to make it particularly suitable for overload conditions when used to replace the traditional zener diode - when the resistance group, the output impedance is effectively improved its bias current is greatly reduced.