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Which flavour of TPS659037 for a AM5728 design?

Wolfram Stumpf
Intellectual 445 points
Other Parts Discussed in Thread: TPS659037, AM5728

Hello there,

I'm working on AM5728 design. According to the TPS659037 user's guide, the following flavours exist:

3.3V / 5V mixed input voltage

- TPS6590374 (0x80) from SLIU011B

- TPS6590376 (0x8A) from SLIU011C

5V only input voltage

- TPS6590375 (0x81) from SLIU011B

- TPS6590377 (0x8B) from SLIU011C

Questions:

1. Are there any recommendations which one to choose?

2. What is the main reason to prefer a 5V only vs. a 3.3V/5V input voltage PMIC?

3. What is the change between the SLIU011B vs. the SLIU011C devices? The revision history mentions solely the new numbers.

Thanks for enlightenment

Wolfram Stumpf

  • 0
    TI__Genius 16410 points
    Hello Wolfram,

    > 1. Are there any recommendations which one to choose?
    > 2. What is the main reason to prefer a 5V only vs. a 3.3V/5V input voltage PMIC?
    Let me answer these both together. Usually, the PMIC configuration is not chosen by input voltage, but instead by power mapping. TPS6590377 has separate rails for DSPEVE, GPU, and IVA to support maximum performance of the processor. TPS6590376 combines those rails, and can only support 4A maximum on the rails combined. If the processor does not need more than this in the worst case (including utilization, process, and temperature), I would recommend to use TPS6590376. However if those rails combined require more than 4A, you must use TPS6590377.

    Note that TPS6590377 can be used with 3.3V in the condition that SMPS9 at 3.3V is not used, and instead REGEN1 is used to enable an external 3.3V regulator.

    > 3. What is the change between the SLIU011B vs. the SLIU011C devices? The revision history mentions solely the new numbers.
    The boot voltage specification of AM572x for MPU and CORE rails was increased to 1.15V, and therefore the PMIC OTP was changed to support this. This is the only difference from TPS6590374->TPS6590376 and TPS6590375->TPS6590377.

    Regards,
    Karl