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TPS65217B电源芯片LDO1 没有电源输出

Other Parts Discussed in Thread: TPS65217

TPS65217B电源芯片在上电后,发现SYS可以正常输出5V电源,而LDO1没有电源输出,在TPS65217的规格书中看到,在默认情况下 LDO1是随SYS 5V一起输出的

请问这是什么原因啊 这个情况和TPS65217底部的接地PAD 没有焊接好会有关系吗