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TPS7A8101: TPS7A8101 输入输出电源跌落

Part Number: TPS7A8101

   

     TPS7A8101 用于5V转3V3,在后端3V3启动时,瞬间电流700MA,出现5V跌落; 此TPS7A8101最大输出是1A的电流,瞬间700mA的电流为什么会出现跌落,可否改善?