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LM1085: 12V固定输出LDO,15V输入通电,管脚处只能测得0.6V输出

Part Number: LM1085

12V固定输出LDO,在按照如下电路连接方式进行输出测试时,输入15V正常,但是输出在管脚处只能测得0.6V的输出,不知道什么原因,下面为我的原理图