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Electronics => Repair => Topic started by: saronno on April 14, 2021, 10:04:16 pm

Title: is there an "easy" way to find a compatible buck regulator to replace one ...
Post by: saronno on April 14, 2021, 10:04:16 pm
... hard to find (at least here in europe)?

The chip I need is a RT8125DGQW from richtek, but it seems I can get one only from china (and it take weeks if you dont' want to spende
a fortune for the shipping).
There is a lot of PWM buck regulator from ST, renases, intersil, etc .... but I just can't find one of the same pinout.
Richtek has a page where you can find their counterpart for other companies regulator. But what I need was the other way around.

Any idea??

Title: Re: is there an "easy" way to find a compatible buck regulator to replace one ...
Post by: ledtester on April 14, 2021, 11:51:39 pm
Do you need one with a compatible pinout?

Otherwise I'd perform a parametric search, e.g.

https://www.ti.com/power-management/non-isolated-dc-dc-switching-regulators/step-down-buck/products.html (https://www.ti.com/power-management/non-isolated-dc-dc-switching-regulators/step-down-buck/products.html)

for TI products.
Title: Re: is there an "easy" way to find a compatible buck regulator to replace one ...
Post by: saronno on April 15, 2021, 07:40:04 am
Yes, I need one with the same pinout ... I am repairing a graphics card with no memory voltage ... this chip
is the one who manage that voltage and of course it was shorted.
Title: Re: is there an "easy" way to find a compatible buck regulator to replace one ...
Post by: saronno on April 17, 2021, 11:49:20 am
APW8723 looks promising ... what do you think?

http://www.datasheet.hk/view_online.php?id=2066143&file=0534%5Capw8723_7855278.pdf (http://www.datasheet.hk/view_online.php?id=2066143&file=0534%5Capw8723_7855278.pdf)