LM340 and 78XX series 3 terminal regulators LM340T5, 12, 15 7805, 7812, 7815

The LM340 series of positive 3 terminal regulators offer similar performance to the 78XX series. They are complete voltage regulators with outstanding ripple rejection and superior line load regulation. Current limiting is included to limit peak output current to a safe level. Safe area protection for the output transistor is provided. If internal power dissipation is too high, thermal shutdown occurs. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

Features
• Maximum 1A output
• Output voltage tolerance ±2%
• Load regulation 0.3%
• Thermal overload protection
• Short circuit current limit
• Output transistor safe area protected
• Continuous dissipation 15W

Basic use as a fixed regulator
The 10μF capacitor across the output is needed for stability and improves the transient response of the supply.