Page History

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•  Can the DC/DC architecture be simplified? Some ICs not in stock, see DC/DC converters
  •  Replace LMZ31530 (30A) with TPSM5D1806 in parallel mode (12A) since Vcc_int is estimated at 7A?
    •  No, the 20A version should be available (LMZ31520)
  •  Replace LT1764 with LT3083 for simpler paralleling circuitry (see power graph)?
•  TPSM5D1806 does not work for 6V to 5.5V as a pre-LDO regulator!
  •  For 5.5V output, the minimum input voltage is 9.6V. See Table 7-3 in datasheet.
  •  Change first-stage converter to output 5.5V instead of 6V?
    
    •  Second-stage LMZ31520 (Vout=0.85V) should be OK
    •  Second-stage TPSM5D1806 (Vout=1.8V and 0.9V) should be OK
    •  Second-stage for pre-LDO is not neededChanged first-stage converter to 5.0V on digital board now
•  Do we have the CML current consumption numbers?
  •  Gang is saying around 20mA (15mA + 30% LVT) per ASIC TX Transceiver (for all frequencies). ASIC RX consumption is negligible 
  •  Update power estimation table with these numbers
•  Request components for Altium library (see Altium Missing Components section)
  •  Connectors have been requested on 2023-08-28
  •  Other ICs
  •  Transceiver
    •  Compare with the layout done in PADS after to make sure it's correct orientation

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