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tps54331输出电压异常

Other Parts Discussed in Thread: TPS54331

我用TPS54331 的,输入18-18.3v,输出5v,电流最大3A,用TI的webench设计的,现在输出异常,只有1v左右,我有按照手册上的参数焊接了一个输出3.3V的,结果还是异常,输出只有1.06v,测试其他引脚电压为Vcomp=0.57v,Vsense=0.8V,Vss=1.75v,Ven=3.05v,Vboot=7v,根据手册说明貌似也符合要求,应该也没有进入ECO-MODE,大家帮忙分析一下、