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TPS54331怎样跳出ECO模式

Other Parts Discussed in Thread: TPS54331, LMR14050

我设计的是8.4v-6V输入  5v输出   但是在6.4V 的时候输出就不稳定了   原理图按照手册推荐设计的  就是把后端的分压电阻改为11.5K   2.2K   输出就异常  求解~~~~~~~~~~~