Description :

The L78xx series of three-terminal positiveregulators is available in TO-220, TO-220FP, TO3, D²PAK and DPAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide
local on-card regulation, eliminating the distribution problems associated with single point
regulation. Each type employs internal current limiting, thermal shut-down and safe area
protection, making it essentially indestructible.

If adequate heat sinking is provided, they can deliver over 1 A output current. Although designed
primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents.