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LP87564-Q1: Use with FPGA

user1287186
Prodigy 80 points
Part Number: LP87564-Q1
Other Parts Discussed in Thread: LP8733, LP87563-Q1

Hello,

We have a new design using the ADP5052 from Analog to supply a Spartan-7 Device (XC7S6).  This device requires external sequencer and some logic to reconstruct power-good signal.

I was looking at the LQ87564-Q1 device to replace the AD chip as, which seems to be a perfect option in my opinion as:

  • We will avoid the use of external sesquencer
  • We will avoid the use of extra logic for getting power good info.
  • We will avoid the use of extral switching mosfets

Leading to a much more cost efficient solution...

We have an external arm device to control the power up/down of the FPGA, so we would be able to control the chip over I2C.

The question I have is quite simple : Would you recommand using the LP87564-Q1 to power a FPGA device? No drawback to be foreseen?

The design is for the railway industry and supposed to last for years...

Thanks for the feedback.

Kind Regards.

  • 0
    TI__Genius 17380 points
    Hello,

    Yes, the LP87564-Q1 (LP875640RNFRQ1 or LP875640RNFTQ1 orderable) sounds like a good fit here. It is popular for FPGA attach when an I2C master like your arm device is available to set the voltages and sequence because of its excellent transient performance and voltage setting configurability. It also helps that if you decide to scale up your solution and require more than 4A, the LP87563-Q1 is available which has two phases multi-phased together to get up to 8A. Combined with the LP8733 family, they can create a flexible power tree manageable by I2C.

    If you have any questions on the configuration guide on the product folder (www.ti.com/.../snvu590), feel free to let us know.