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TPS7A8901RTJT源端3.3V压降问题

使用TPS7A8901RTJT实现3.3V转2.5V和1.0V,目前测试中

3.3V会下降为2.4V,2.5V输出为2.39V,1.0V输出为1.00V

请问源端3.3V电压下降原因?电路设计如下