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TPS54302输出电流异常

Other Parts Discussed in Thread: TPS54302

我负责的一个项目需要24VDC输入,4.2V/2A输出,使用TPS54302作为电源转换IC,在空载时,每隔480ms会有一个1.18A左右的电流脉冲波形,带1.3A负载时,每隔5us会有一个3.32A左右的电流脉冲波形,请问各位大神,这是什么原因造成的呢?(文件中有图形)

设计原理图:

空载时电流、电压波形(绿色为输出电流波形,蓝色为SW引脚波形。):

带1.3A负载时电流、电压波形(绿色为输出电流波形,蓝色为SW引脚波形。):1211.docx