how to find mark on a chip

[Dsun.21]

I have this chip on a board LD2985BM50R. how can I verify the mark on top of the chip is marching the chip? it is really funny that the mark wasn't mentioned in the data sheet.

Thank you,

David

[Peter BENSCH]

The LD2985BM50R has the marking B550, which is also on the label of the bag/box with which the board was equipped.

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Good luck!

/Peter

[Piranha]

It is a long standing annoyance that ST doesn't provide the SMD markings in datasheet! That data is not some commercial secret, but is effectively a shortened part number. Why it is not written in datasheet as other manufacturers do?

[Dsun.21]

if you could provide a generic way to find the Mark from data sheet or website, that will be even better.