设计中1.8V输入,输出1.2V,但是实际测得电压输出1.0V左右,电阻焊接正确,FB管脚电压0.67V,改变FB分压电阻后FB电压改变,输出异常,PG管脚电压为0V,输入1.8V稳定正常,请问会有什么原因造成此情况
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