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查看了元器件参数表，未发现明显差别，求指导
LP2985AIM5-2.8/NOPB与LP2985A-28DBVR同样是A级，价格差了一倍
HI
TI没有出文档说明，建议你直接比较2个芯片的datasheet。
打印出来对比比较方便， 参数上可能差不多，差异主要在封装，输入电压范围等。
