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POE电源TPS23753输出电源纹波较大,Vpp约160mV,复杂波动时会增大至200mV多。

Other Parts Discussed in Thread: LM5118

用了一款POE芯片TPS23753APW,结果电源纹波较大Vpp=160mV,输出电容换成高频低阻电容,改善不大,

请问,输出电压纹波和Layout关系大吗?


下图是全貌图:



下图是细节图: