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TPS650864: PMIC for ZU19

Kyle Wissmiller1
Prodigy 10 points
Part Number: TPS650864
Other Parts Discussed in Thread: TPS6521905, TPS650861

Tool/software:

Hello,

I’m working on a new design where we need to power a Zynq Ultrascale+ SoC and I’m evaluating a few options.   We’re using XCZU19EG-L1FFVC1760I.  I found this reference design that looks like it may suit our needs.  Power Reference Design for Xilinx® Zynq® UltraScale+Tm MPSoC Applications (Rev. A)

 

A few questions:

Does the PMIC support remote voltage and current sensing over the I2C interface?

It looks like all the output voltages are programmed over the PMBus, but what are the default outputs?  When we power it up for the first time, are all the outputs disabled allowing for programming to the correct voltages.  What is the process for pre-programming the OTP registers at the factory.  This may be good when we are moving into production.

What is the life cycle of the part and years to EOL? 

What is lead time on the evaluation board?  

  • 0
    TI__Guru* 81034 points

    Hi Kyle,

    There is a newer device available that might be a better option - TPS6521905. See the thread below for more information along with slides on this solution. The TPS6521905 can be programmed by a 3rd party or in the end user production environment to select the settings for the specific use case. 

    https://e2e.ti.com/support/power-management-group/power-management---internal/f/power-management---internal-forum/1369938/tps65023-part-recommendation/5233519

    Best regards,

    Matt

  • 0
    TI__Mastermind 22150 points

    Hi Kyle,

    The TPS6521905 is a very good option and is (in my opinion) easier to program with custom settings than the TPS65086x family of PMICs. However, I have answered your questions below as well.

    For TPS65086x:

    • The PMIC doesn't support current sensing, it only has single-ended sensing. We recommend connecting the feedback trace to the positive terminal of the local capacitors. If you decide to have a longer point-of-load trace, I would recommend adding some extra local capacitance just to mitigate any increased transient overshoot/undershoot. I've heard that ferrite beads on the output can also help but I'm not that familiar with those components. You may want to connect the feedback trace close to the PMIC and use a resistor divider to slightly raise the output voltage instead of using a very long feedback trace.
       
    • The default outputs of the PMIC will depend on the PMIC version. There are some good summary tables in this document: Using TPS65086x PMIC to Power Xilinx Zynq UltraScale+ MPSoCs. You can find other documentation on the TPS650864 product page. 
       
    • If you need custom programming and you want a PMIC with blank memory so that you can wake up the IC without enabling any voltage, you would need to use the TPS650861 user-programmable version.
       
    • We have some pre-programmed part versions available already. The version you need will depend on the processor version- which should also be described in the above application note I linked.
       
    • I have not heard of any plans to EOL these parts. I still see many people using and asking about this IC.
       
    • TPS650860 Evaluation boards should be in stock right now so time from order to delivery will only depend on the destination distance from our product distribution center.

    Regards,

    James