topic Re: PMIC for ls1046 in Layerscape

PMIC for ls1046

Ellu24 — Wed, 25 May 2022 04:34:07 GMT

Can I use MC33PF8100EPES PF8100 as PMIC for LS1046a hardware design? Please find datasheet attached

Thanks in advance.

Re: PMIC for ls1046

diazmarin09 — Thu, 26 May 2022 18:47:58 GMT

Hello Elizabeth,

I hope all is great with you.

In this case, I would like to recommend the PF8100 PMIC family that is designed for high-performance processing applications.

More specifically, I do recommend the MC33PF8100EAES device, which is intended for the LS1046A processor.

I hope this information helps.

Regards,

David

Re: PMIC for ls1046

Ellu24 — Thu, 26 May 2022 23:40:42 GMT

Hi David,

Thank you very much for your valuable reply. I have one more question that, In reference design I saw a separate voltage regulator for VDD (0.9/1v) . My question is that , can I use PF8100 PMIC for generating VDD as well? And what is the need of separate voltage regulator n reference design.

Thanks in Advance

Elizabeth

Re: PMIC for ls1046

diazmarin09 — Fri, 27 May 2022 15:35:28 GMT

Hello Elizabeth,

Thank you for using the NXP communities.

Could you please point our which reference design?

You can use the PMIC for generating such voltage. For example, using the MC33PF8100EAES device (EA configuration) you can notice that the SW4 is not used.

So, using the VSWx_RUN register, you can setup the SW4 regulator to generate the desired voltage.

I hope this information helps.

Regards,

David

Re: PMIC for ls1046

Ellu24 — Mon, 30 May 2022 01:24:39 GMT

Thank you very much for the reply.

My question is that is it necessary to provide another regulator for getting CPU_VDD(0.9/1v), that is LTC 7150 as in reference design I attached below or can I use PF8100 itself for VDD? Is it necessary that VDD(0.9/1v) should be at 20A?

Please find the attachment.

Thanks in advance

Re: PMIC for ls1046

Ellu24 — Mon, 30 May 2022 01:56:33 GMT

I have one more question that is it acceptable to use MC33PF8100EPES for LS1046 as this PMIC is programmable?

Thanks in advance

Elizabeth

Re: PMIC for ls1046

diazmarin09 — Mon, 30 May 2022 16:28:14 GMT

Hello Elizabeth,

I hope all is great with you.

As mentioned before, you can use the SW4 regulator for example. In this case, please be aware about the current. The SW4 can supply up to 2.5A.

I am afraid that the PMIC is not capable of providing 20A.

Finally, please note that the MC33PF8100EPES device is designed to be compatible with the i.MX8QM.

I recommend to review the EP configuration to determine if the device is useful for your application.

I hope this information helps.

Regards,

David

Re: PMIC for ls1046

Ellu24 — Tue, 31 May 2022 03:59:28 GMT

Hi ,

Thank you very much for your prompt replies. When I checked EP configuration, I found that switch 3,4,5 are off.So is it possible for me to program those regulator with my desired voltage and current and use it for LS 1046.

Please see this and express your opinion regarding this.

Thanks in advance

Elizabeth

Re: PMIC for ls1046

diazmarin09 — Wed, 01 Jun 2022 21:29:05 GMT

Hello Elizabeth,

Thank you for using the NXP communities.

You are correct, based on the EP configuration , the following regulators are OFF by default.

After the start up, you can configure such regulators based on the requirements of your design.

I just want to make sure that you are not using the EA configuration as it was designed to work with the LS1046A processor.

Regards,

David

Re: PMIC for ls1046

Ellu24 — Wed, 01 Jun 2022 23:53:12 GMT

Hi David,

Thank you very much for your valuable information. It helped me very well. Actually, I decided to switch over EA configuration so that I can get all voltages for my processor. Now I have some questions:

1) Can I provide VDD for the core (0.9/1v) by using SW 1 of EA configuration and what is the current for VDD? Please find attachment.

2) How to use LDO output voltages or is it necessary to use?

3) Is current programmable in PF8100?

Thanks in advance