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7905接法参考图:要知道7905的接法，首先当然是7905的管脚图了，然后还有7905的应用电路。

*Required if regulator is separated from filter capacitor by more than 3×. For value given, capacitor must be solid tantalum. 25 mF aluminum electrolytic may be substituted.²Required for stability. For value given, capacitor must be solid tantalum. 25 mF aluminum electrolytic may be substituted. Values given may be increased without limit.For output capacitance in excess of 100 mF, a high current diode from input to output (1N4001, etc.) will protect the regulator from momentary input shorts.