I have two board revisions, and each one has an LM25117PMH IC. but the chips have a different code on them as well. I am trying to find information as to what the codes mean, if its to mark a different revision of IC or if it is factory or batch number etc.
Both chips have a symbol for National Semiconductor branding
1st IC: 44A0X4U LM25117PMH
2nd IC: 51ALCCU LM25117PMH