PC motherboard voltage regulator MOSFET driver replacement

[Phaseseeker]

I'm trying to fix a PC motherboard where the driver for one of the VCORE regulator MOSFET drivers, an UP1952P by UBIQ Semiconductor (never heard of them either) got shorted and killed by the CPU cooler bracket. My problem is that I can only get said part from China with either a month of wait or an outrageous shipping cost, so I thought about replacing it with another driver I can get from western sources; I'm not sure how to pick an appropriate device though, I tried looking on mouser but I didn't find anything that looked like it would work.
I've also thought about just making the whole regulator work in 3-phase mode (it's got four identical converters in parallel, and the CPU that is installed shouldn't need the full power the regulator is capable of) by removing the driver + corresponding inductor (the MOSFET themselves are fine) and configuring the controller (UP1651, also by UBIQ) for 3-phase mode but in my tests it doesn't seem happy about it and fails to start. Is there something I'm missing there or could it just be a matter of the CPU drawing too much and dragging the output down?

Thanks in advance for any replies.

[fzabkar]

The datasheet for the UP1952 identifies Unitpower as the manufacturer, not UBIQ Semiconductor. Are they the same company?

http://img.plokij.com/UserDocument/2017y/WGGKLTD/dn/zl10935.pdf

[mariush]

It's UPI Semi ,  and Ubiq is part of UPI Semi nowadays... they merged in 2019.

Anyway...  as you figured out it's a mosfet driver.

Do some research and see if  Richtek RT9624 would be compatible ... the pinout is the same but I didn't check the specs : https://www.richtek.com/assets/product_file/RT9624B/DS9624B-07.pdf

Though it seems to be WDFN 3x3 while the UP part is WDFN 2x2 ... this version RT9624GGQWA is not in stock but it's 8-WDFN-SL (2x2) :  https://www.digikey.com/en/products/detail/richtek-usa-inc/RT9624GGQWA/16376826

[Phaseseeker]

Thanks for the suggestion, it looks like that part would be compatible; Unfortunately, it's about as hard to get as the original here in Europe (at least in the right package - the motherboard uses the "SOP-8 with exposed pad" version). Looks like I'll have to get it from China and wait a month after all.