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TPS54425电源输出受干扰严重,请教如何解决

Other Parts Discussed in Thread: TPS54425

在使用TPS54425芯片时,9v电源输入,要求3.3v输出,但是输出的3.3v电源总是不干净,具体波形图与原理图如下:

原理图:

9V电源输入波形:

3.3V电源输出波形:

VFB引脚输出波形:

芯片SW输出波形:

请教各位如何让3.3V电源能够干净的输出?