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TPS65261: TPS652661做稳压电源,空载输出正常,带载输出电压会下降,且产生周期震荡

Part Number: TPS65261

使用TPS652661做稳压电源,输出3.3V/3A,1.2V/2A,1V/2A,空载时可以,带载时,1V输出将为970mv,1.2V有周期性毛刺,3.3V电压会产生振荡,请问有没有大佬指教一下啊。

下图是我的电路图和3.3V的震荡图。

电路图中PVIN1设计错了,已飞线接到5V。调整过程中将L6修改为3.3UH也没用。是不是被必须得4.7uh,或者COMP补偿电路哪里有问题?