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各位大神好，以上为我的原理图。TPS54310,空载时输出为1.26V，加上负载后电压跌落到1.22V左右，低温-40℃下直接跌落至1.15-1.20V，大神们分析一下，是电路外围有什么问题么。
可以参考附件优化一下你的电路TPS54310-1.26Vout-3A.pdf
