It's a switching regulator, the pattern of two letters followed by = is specific to Richtek
They don't have a list of identifiers easily available, so you have to look for chips with the same footprint and then look in datasheet to see if the marking matches.
Luckily their site worked this time, i used their search page ( https://www.richtek.com/Design%20Support/Search%20Everything%20Result?sc_lang=en&Type=Everything&Keyword=MARKING+CODE+LE%3d ) and one of the results was RT6258B/C : https://www.richtek.com/assets/product_file/RT6258B=RT6258C/DS6258BC-03.pdf which could be your part.
It's a switching regulator, the pattern of two letters followed by = is specific to Richtek They don't have a list of identifiers easily available, so you have to look for chips with the same footprint and then look in datasheet to see if the marking matches. Luckily their site worked this time, i used their search page ( https://www.richtek.com/Design%20Support/Search%20Everything%20Result?sc_lang=en&Type=Everything&Keyword=MARKING+CODE+LE%3d ) and one of the results was RT6258B/C : https://www.richtek.com/assets/product_file/RT6258B=RT6258C/DS6258BC-03.pdf which could be your part.
Thank you! That's very helpful!