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lm3102MARK标示第一行是什么意思

Other Parts Discussed in Thread: LM3102

你好

我购买了两批次的LM3102芯片,它们的MARK标示的第一行分别是49CCY90、3CAV2JU,不知道它们有什么区别?

   还有,我有一个设计,要求在4.5V~36V输入下,满足2A负载输出,输出电压在3.35V~3.45V。

实际状况中,在电压≥4.7V时可以获得稳定的3.35V~3.45V电压。在输入电压为4.5V时,上电短

时间内可以获得3.35V~3.45V电压,但随工作时间越长,由于芯片功耗温度升高,输出电压会下

降到3.2V左右。我始终找不到导致其电压下降的原因是什么,希望你能给予我帮助。

      谢谢!!!