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TPS65131正输出短路,负压输出正常。

Other Parts Discussed in Thread: TPS65131

TPS65131,输入电压5V,输出电压+/-15V,原理图如上,直流电源设置为5V,3A,上电后直流源过流保护,此时输入电压拉低为1.2V,ENP,PSP,ENN,PSN为1.2V。L1为1.2V恒压。

去除L1,不短路,负压可正常输出,VREF1.214V。电阻电容值正确,焊接2块单板现象相同。

请问是因为MOSFET一直对地短路吗?如果是的话,哪里错了导致这个问题?