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TIDA-01371:关于TPS7A3301RGWR的负压输出

Part Number: TIDA-01371

Tool/software:

您好,关于负压输出我有一个问题,我用的是该设计方案的pcb源板进行调试,VCNTRL (-Ve)为-0.1v,运放电源vcc为12v,输出的Virtual-GND-Neg大概为 VCNTRL (-Ve)的21倍,但是TPS7A3301RGWR的输出电压相比于Virtual-GND-Neg为0电势,其中-Ve VIN电压是-12v,测量c14两端电压为-3.3v,但是输出电压(相比于Virtual-GND-Neg)为0v,也就是c15两端电压为0v,请问问题可能出在哪里