LM79M05, LM79M12, LM79M15
SNOS553D –MAY 1998–REVISED APRIL 2013
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*Required if regulator is separated from filter capacitor by more than 3″. For value given, capacitor must be solid
tantalum. 25μF aluminum electrolytic may be substituted.
†Required for stability. For value given, capacitor must be solid tantalum. 25μF aluminum electrolytic may be
substituted. Values given may be increased without limit.
For output capacitance in excess of 100μF, a high current diode from input to output (1N4001, etc.) will protect the
regulator from momentary input shorts.
Figure 12. Fixed Regulator
*Improves transient response and ripple rejection.
Do not increase beyond 50μF.
Select R2 as follows:
LM79M05C
LM79M12C
LM79M15C
300Ω
750Ω
1k
Figure 13. Variable Output
*Resistor tolerance of R4 and R5 determine matching of (+) and (−) outputs.
**Necessary only if raw supply filter capacitors are more than 3″ from regulators.
Figure 14. ±15V, 1 Amp Tracking Regulators
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