Can you please explain the differences between LM5109, LM5109A, and LM5109B? I can see a few differences in the datasheets (no suffix has higher voltage and seems to be a bit more powerful/robust driver, A and B have slightly lower operating current and slightly higher LO side UVLO), but it's unclear to me if there are real performance differences or if any changes are more collateral (die improvement/correction, different process, moving to a new/different fab, etc.). While A and B do appear to be a different die than the original with no suffix, A and B appear virtually indistinguishable. It appears the B suffix is preferred, but I don't see anything to indicate any expected changes to a design if moving from an older version to the B version.
Also, was LM5109 (no suffix) ever released in WSON package? It's in the datasheet but not on the product page. A and B suffix versions list 2 packages.