LM2940IMP-5.0 稳压芯片 , 输入5v的时候,90mA负载,输出4.28V ,为什么压差值那么大
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LM2940IMP-5.0 稳压芯片 , 输入5v的时候,90mA负载,输出4.28V ,为什么压差值那么大