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LTC3889 VIN over-voltage fault issue

Hi,

I'm testing a custom board with the LTC3889 and I cannot set the outputs to any voltage. The design is the same that 2595A Demo Circuit except for EXTVCC that in this case it's connected to an external 12V instead Vout0.

I've connected DC1613A to my board to check what's going on and here's what I see from LTPowerPlay:

  • VIN_OV_FAULT is present on STATUS_INPUT. Why? I power Vin with 48V
  • MFR_PADS is referred to LTC3886 instead LTC3889. Why? It is a LTpowerPlay bug?

Here's my LTC3889 package and attached schematic

PDF

Thanks in advance,
gaston



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[edited by: gschelotto at 11:23 AM (GMT -4) on 18 Mar 2022]