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LMZM23601V3的3.3V输出不正常

Other Parts Discussed in Thread: LMZM23601

电路如下:

输入电压是VCC=12V,负载是STM32F407,正常的工作电流大约150mA。出现的问题是:上电后,Vout电压呈现波动状态,如下图所示:

各位大神帮忙分析一下,是什么原因?