Skip to main content
G
guansonghuang
Associate III
July 22, 2024
Solved

pmic STPMIC1A

  • July 22, 2024
  • 1 reply
  • 1224 views

Hi st friends:

  stm32mp135f-dk bord use pmic  STPMIC1D, but it is too expensive than STPMIC1A.

can i replace STPMIC1D with STPMIC1A

Best answer by PatrickF

Hi @guansonghuang 

in large quantities, both should be same pricing, but I agree that STPMIC1D pricing at distributor is probably higher due to more volume sold on STPMIC1A (as STPMI1D is more recent and still ramping up for larger quantities).

You could use STPMIC1A, but the board should be adapted (not a drop-in replacement on existing board using STPMIC1D).

With STPMIC1A, VDDCORE and VDDCPU are merged on Buck1. This mean no VDDCPU overdrive, so only STM32MP135C supported.

Please refer to AN5587.

PatrickF_0-1721634107667.png

PatrickF_1-1721634120207.png

 

Regards.

1 reply

PatrickF
PatrickFBest answer
Technical Moderator
July 22, 2024

Hi @guansonghuang 

in large quantities, both should be same pricing, but I agree that STPMIC1D pricing at distributor is probably higher due to more volume sold on STPMIC1A (as STPMI1D is more recent and still ramping up for larger quantities).

You could use STPMIC1A, but the board should be adapted (not a drop-in replacement on existing board using STPMIC1D).

With STPMIC1A, VDDCORE and VDDCPU are merged on Buck1. This mean no VDDCPU overdrive, so only STM32MP135C supported.

Please refer to AN5587.

PatrickF_0-1721634107667.png

PatrickF_1-1721634120207.png

 

Regards.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.NEW ! Sidekick STM32 AI agent, see here
    G
    guansonghuangAuthor
    Associate III
    July 22, 2024

      @PatrickF thank you. but I think  if  is it  ok to  add  and external LDO to convert buck4(3.3v) to 1.2v,

     

    PatrickF
    PatrickF
    Technical Moderator
    July 22, 2024

    Hi,

    not sure to understand the meaning of adding an LDO. Converting buck4 3.3V to 1.2V is more  expensive than simply connecting VDDCPU/VDDCORE to BUCK1 as listed in AN5587 and does not bring any gain (as Overdrive still not possible).

    See also AN5586 for discrete power supply information.

    Regards.

    In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.NEW ! Sidekick STM32 AI agent, see here
      Terms & ConditionsAccessibility statement