LM7912 Datasheet | National Semiconductor

Description The LM79XX series of 3-terminal regulators is available with fixed output voltages of b5V b8V b12V and b15V These devices need only one external ponent a pensation capacitor at the output The LM79XX series is packaged in the TO-220 power package and is capable of supplying 1 5A of output current These regulators employ internal current limiting safe area protection and thermal shutdown for protection against virtually all overload conditions Low ground pin current of the LM79XX series allows output voltage to be easily boosted above the preset value with a resistor divider The low quiescent current drain of these devices with a specified maximum change with line and load ensures good regulation in the voltage boosted mode For applications requiring other voltages see LM137 data sheet Features Thermal short circuit and safe area protection High ripple rejection 1 5A output current 4% tolerance on preset output voltage Connection Diagrams TO-220 Package Typical Applications Fixed Regulator TL H 7340 - 3 TL H 7340 - 14 Front View Order Number LM7905CT LM7912CT or LM7915CT See NS Package Number TO3B Required if regulator is separated from filter capacitor by more than 3 For value given capacitor must be solid tantalum 25 m F aluminum electrolytic may be substituted Required for stability For value given capacitor must be solid tantalum 25 m F aluminum electrolytic may be substituted Values given may be increased without limit For output capacitance in excess of 100 m F a high current diode from input to output (1N4001 etc ) will protect the regulator from momentary input shorts C1995 National Semiconductor Corporation TL H 7340 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Input Voltage (Vo e b5V) (Vo e b12V and b15V) b 25V b 35V Input-Output Differential (Vo e b5V) (Vo...