MC7800,mc7800A,LM340,LM340A series datasheet,Three-Terminal Positive Voltage RegulatorsThese voltage regulators are monolithic integrated circuits designedas fixed–voltage regulators for a wide variety of applicationsincluding local, on–card regulation. These regulators employ internalcurrent limiting, thermal shutdown, and safe–area compensation. Withadequate heatsinking they can deliver output currents in excess of1.0 A. Although designed primarily as a fixed voltage regulator, thesedevices can be used with external components to obtain adjustablevoltages and currents.