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TIDA-01480: power reference design for Xilinx Zynq Ultrascae+ FPGA - XZU7EV

Viktorija Cecil
Genius 17961 points
Part Number: TIDA-01480
Other Parts Discussed in Thread: TPS650864, , TPS54318, TPS54424, BOOSTXL-TPS650861, TPS650861

Team, 

I can't seem to be able to locate a power reference design for Xilinx Zynq Ultrascae+ FPGA - XZU7EV. 


Do we have one? 

Thanks

Viktorija

  • 0
    TI__Mastermind 30260 points
    Viktorija,

    This reference design uses the TPS650864 PMIC for the ZU3EG: zedboard.org/.../ultra96

    The same PMIC works for the ZU7EV, as documented in the datasheet.
  • 0 in reply to Brian Berner
    TI__Genius 17961 points
    Brian, thanks for a quick reply. Feedback from customer:
    I suspect that VCCINT with 3A is good enough for XZU7EV for FVC1156 package or higher.
    Also, the design is missing VCCINT_VCU which would need another 2.5A.
    Thoughts?
    Thanks
    Viktorija
  • 0 in reply to Viktorija Cecil
    TI__Mastermind 30260 points
    Viktorija,

    Correct, VCCINT_VCU was separated out by Xilinx after the initial release of the ZU+ family.

    The TIDA-01480 design added it as a note in the block diagram, but the Ultra96 board from Avnet is fitted with the ZU3EG so there is no need for the VCCINT_VCU rail.

    All Xilinx designs are always a little more complex due to the flexibility of an FPGA.

    My recommendation would be to use the TPS6508641 device variant and add on a single TPS54318 (3A) or TPS54424 (4A) to generate the 0.9V for VCCINT_VCU. This would be the simplest option that still allows you to re-use the reference design.

    If you can map out the power of the TPS650861 in a different way to match your design perfectly, you can use the BOOSTXL-TPS650861 to program prototype samples for a new user-defined OTP variant of the device. This could eliminate the need for the discrete DC-DC, but it would be a little more complex.