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TPS629210-Q1: 输出电压跌落为2.6V造成系统复位

Part Number: TPS629210-Q1


电路图如下:

输入电压DC9V,输出电压3.3V,下图中紫色线为PG信号,黄色线为输出3.3V,上电一段时间,出现3.3V跌落至2.6V(图中有一个跌落,时间约70us),造成MCU复位是什么原因?