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TPS61178: 纹波大,250mV,如何解决

Part Number: TPS61178

如下图,我做了一个TPS61178的测试板,C830和C848是没有焊的,其它器件都焊接了。

输入8V,输出16V,2A,目前输出纹波250mV,太大,如何减小纹波?