Kinda makes sense, Vin microsusb 5v output charging a tiny battery LX pin, 1.2v ish
Maybe I'll try same chip but different package
Even a different manufacturer should be fine as long as same pin layout
He used the correct number ATU not A7U, I could not make out the pin style because they were covered by your tweezers
Another ic with the same marking (ATU) is MP1476GTF
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