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LMR51420: 输出不稳定,MCU无法正常运行

Part Number: LMR51420

LMR51420XDDCR这是详细型号。通过嘉立创平台采购加工成套电路,

通电后,MCU不工作(运行指示灯没亮),测量的电压2.8V(需要是3.3V)但按下MCU复位按钮是4.8V;

从MCU编程接口USB模块供3.3V后,MCU运行正常。

判断是电源问题。但经过检查也发现问题。

麻烦指点: