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TPS61221反复上下电,1/10概率输入输出电平出现噪声,幅度272mV周期50ms的下尖峰,请FAE协助分析下,谢谢!

Other Parts Discussed in Thread: CC2541, CC2540

电路图如下,参考的是datasheet 的

反复上下电,概率大概有1/10,异常时的输入输出都有幅度272mV周期50ms的下尖峰

datasheet上给的(用的是61221,所以R1=0,R2悬空):