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LM25117随着负载电流升高,输出电压被拉低!!

Other Parts Discussed in Thread: LM25117

请问各路大神:

LM25117随着负载电流升高,输出电压被拉低是怎么一回事,参照工具完成的电路,Rsense电阻工具是12毫欧,我用了5毫欧、10毫欧、15毫欧都不行;

output:19V、5A。

有劳!谢谢