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lm2575HV 48v转12v时电容选择问题

zhang long
Prodigy 70 points

 datasheet上介绍了 Fixed Output Voltage Versions 的选择步骤，对于CIN介绍时仅给出

An aluminum or tantalum electrolytic bypass capacitor located close
to the regulator is needed for stable operation.

这么一句，请问要实现48V转12V怎么选择cin的容值和耐压？