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TLV62585: TLV62585DRLR FB引脚电压异常,Vout不同电压输出时,Vfb引脚电压不是0.6V,出现0.89V,1.1V的异常?

Part Number: TLV62585

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请问TLV62585DRLR FB引脚电压异常,Vout不同电压输出时,Vfb引脚电压不是0.6V,出现0.89V,1.1V的异常?详细电路图如下,PCB部分唯一觉得可能有问题的点:Pin5的走线是5mil,相对较细,但是增加飞线加粗测试,依然是这种状态,是工作模式有问题么?如何确定其工作模式,FB范围是0.3~3V,如资料上说PWM模式下是Vfb=0.6V。