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REF3225输出2.52v,输出不正常

Other Parts Discussed in Thread: REF3225, TPS63002

同样的电路,上次是两层板,原理都是通过TPS63002输出5v电压,但是上次两层板的时候,REF3225能准确输出2.5v电压,但是这次是四层板,多了内电层VCC和GND,TPS63002输出5v电压VCC3引入到内电层VCC,电源地引入内电层GND,电容都是一样的3引脚通过0.47uf电容接地,输出接了一个0.1uf对地电容,但是这次却输出2.52v,请求指导。