LM2940使用疑问

TI老师好，关于LM2940使用，有些疑问再咨询一下：

1.Output Voltage Trimmed Before Assembly这个怎么理解？Mirror Image Insertion Protection这个怎么理解？这些在手册里哪些地方有说明呢？麻烦解答一下；

2.如下所示：

关于输出阻抗测试，是在100mADC and 20mArms f0=120Hz条件下测得，怎么要同时施加直流与交流信号，LDO输出阻抗到底怎么测试呢？请帮忙解答一下；

谢谢！

Output Voltage Trimmed Before Assembly

芯片是固定输出电压的。

在芯片组装前就已经将输出电压trim好了，保证了输出电压的精度。

Mirror Image Insertion Protection这个怎么理解？

Mirror-image insertion protection means that a regulator is designed for use when a voltage, usually not higher than the maximum input voltage of the regulator, is applied to its output pin while its input terminal is at a low voltage, volt-free or grounded. Some regulators can continuously withstand this situation; others might only manage it for a limited time such as 60 seconds, as usually specified in the datasheet. This situation can occur when a three terminal regulator is incorrectly mounted for example on a PCB, with the output terminal connected to the unregulated DC input and the input connected to the load. Mirror-image insertion protection is also important when a regulator circuit is used in battery charging circuits, when external power fails or is not turned on and the output terminal remains at battery voltage

怎么要同时施加直流与交流信号，LDO输出阻抗到底怎么测试呢？

》》》》就是在直流的基础上叠加一个交流信号。

Neil,您好！

       感谢您的解答，有没有LDO输出阻抗测试以及电源输出阻抗测试文档给我们分享下呢？

谢谢！

抱歉，手头上暂时没有，我再找找看