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LMZ22005空载功耗大!!!

Other Parts Discussed in Thread: LMZ22005

TI技术:LMZ22005易电源输出是5V时,空载测量有188mW的功耗。

而同样的电路,仅把反馈电阻更改,变成3.3V输出时就几乎没有空载功耗。

这是什么原因?

我想5V输出时也没有空载功耗。