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TPS54290输出电压不对,而且不稳定

Other Parts Discussed in Thread: TPS54290

我使用的是TPS54290,输入12V想得到3.3V和1.2V,原理图我是按数据手册上的电路画的,但是焊好电路测试,两个电压输出3.3V的输出 3.0V-3.8之间跳动,输出1.2的在1.4-2.0之间跳动,还经常烧坏芯片,这是我画的电路图,帮忙看看这是什么问题,谢谢!