ideapad 320 14ikb (nm-b242) help identifying ic

[luna69]

The IC in question is an LV5028. It is a voltage regulator ic with multiple outputs, 1v, 1.2v, 1.8v, 2.5v. it powers the ram, pch, and gpu. There is nothing about it on google.
Do you have any sources for similar or substitute ics? If not, do you have a source for donor boards similar to this one? or am I SOL? thanks

[mcplslg123]

Re: ideapad 320 14ikb (nm-b242) help identifying ic

LV5028AGQV is the IC but yeh there is no information about it on net.

[R_J]

Re: ideapad 320 14ikb (nm-b242) help identifying ic

I see one place that lists the Lenovo LV50287KC as in stock
I also found this for a ideapad 510, it uses a LV5075AGQV, it is similar but seems to have different voltage outputs, not sure if they are set by external resistors or not

This thread has a schematic, also "SEARCH" for ideapad 320 for other threads, some also have boardview.

[digitalpc]

Re: ideapad 320 14ikb (nm-b242) help identifying ic

i think this is your chip and all info about pins and voltage

https://www.usbdev.ru/files/smi/sm3257endatasheet/

[R_J]

Re: ideapad 320 14ikb (nm-b242) help identifying ic

This is where the schematic is https://www.badcaps.net/forum/attach...6&d=1562950695
The SM3257en is a usb2.0 flash memory controller, not a power control/regulator ic

[luna69]

Re: ideapad 320 14ikb (nm-b242) help identifying ic

I see one place that lists the Lenovo LV50287KC as in stock
I also found this for a ideapad 510, it uses a LV5075AGQV, it is similar but seems to have different voltage outputs, not sure if they are set by external resistors or not

This thread has a schematic, also "SEARCH" for ideapad 320 for other threads, some also have boardview.

Thank you! The output voltages are set in the chip, as it seems like there is no feedback resistors for the LDO's. I have yet to see if I can order some in order to fix my laptop. It's kinda a shot in the dark though, as I am uncertain if it will work, or if I have to look elsewhere. Any news on alternative chips to use? I'm not expecting much, because it is exclusive to lenovo. I hope that I still have some chance of reviving it.