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LMR14206: Start up issue, internal vref sits at half its normal voltage

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Part Number:LMR14206

We have a 12v in 5v out design. Followed the guidelines carefully. We notice that occasionally the regulator starts up in a strange state where its voltage reference is about half what it should be. We get 2.5v out instead of 5v.

It seems to be related to startup current. With a bench power supply we can deliberately cause the behaviour by setting current limit with too low a margin above nominal. 

Any suggestions as to now we may cure this behaviour.


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