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LM3481 SEPIC 电路输出纹波太大问题

Other Parts Discussed in Thread: LM3481

Hi TI工程师

     目前使用LM3481来做DC12V输出的方案,原理图参照官网提供的,板子是用万能板焊接的,如下图

现在满负载(2.5A)时输出纹波峰-峰值632mv(20M带宽限制),请问纹波产生的原因及如何降低输出纹波,如图,谢谢!