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5V输入，3.3V输出。轻负载下，输出电压超过3.3V，达到4V或以上。增加一个电阻负载（0.4A），运行就正常。问题主要是在哪里？
亲；建议传下原理和PCB图吧。
你好，这调整率也太夸张了，原理图发上来看看，谢谢。
哪里出问题了，否则不可能
