Welcome, @AAnde.5, to the community!
Even if the L5991 is old, only the DIP16 package is obsolete, the SO16 package is still in production, so I moved your question from Discontinued Products to Power Management.
Yes, it would be a good idea to switch to the L5991AD.
Good luck!
If the problem is resolved, please mark this topic as answered by selecting Select as best. This will help other users find that answer faster.
/Peter
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