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TPS53319: TPS53319的电感问题

Part Number: TPS53319

hi IT

我用了webenchd 推荐的原理图做了TPS53319的电路,使用1.5uH和3.3uH电感,都没有3.3V输出,更换10uH电感就有3.3v输出,请问这是什么原因?