用TPS5430做BUCK电路,layout是按照webench画的为什么输出纹波在80mV左右,怎么才能减小纹波,有合适的layout推荐吗
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HI
TPS5430芯片内部有补偿电路,你需要确认是内部 补偿还是外部补偿, 环路不稳定容易造成纹波过大。 如果你选用webench推荐电路,注意严格参考电路中的输出电容以及其ESR,这个牵涉到环路补偿。