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LM3478输出电压纹波是锯齿形状



Hi, TI专家

我用webench生成一个升压电路,输入5V,输出5.1V~5.8V(通过电位器调节输出)。 现在输出电压是可以调节的,且在期望的范围内。用示波器观察了下输出电压波形,发现有锯齿状的纹波及尖脉冲。下图是波形。麻烦专家们给出建议,如何才能去除这个锯齿纹波及尖脉冲?谢谢

下面是原理图。板子是手焊接的,不知道是否影响输出波形。