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LP5912-3.3DRVT LDO输出4.12V,请帮忙

大家好,新做的一块板子,上面有一路LDO,

型号LP5912-3.3DRVT, 输入5.2V,输出得到4.12V,正常应该得到3.3V的,

很奇怪, 请问可能的原因是什么?  

原理图如下: