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tps7A4901输出电压问题

Other Parts Discussed in Thread: TPS7A49

在用WEBECH设计完电路,并将电路导入到ad中,画好pcb板之后,焊接发现当在板子上焊上其他电源芯片和LDO之后再焊tps7A4701,发现输入是14V,输出只有10.8V,而我要的输出是12V,相差太大。当我单独只焊TPS7A4901和与他对应的电源芯片时,TPS7A4901输出电压又高达13.2V,不知道什么原因。