Hello
it is a question about CICLON FET。
Please see the data sheet of CSD87350Q5D, and the page 3.
Zds（Q2 Sync FET）=1.2 mΩ(typ Effective AC VOUT = 1.3V, IOUT = 20A,）
But、page 7. Please see Figure21 Rds=2.2 mΩ(tc=25 ID = 20A Vgs=5)
Ron of FET applies current limiting by ON resistance of FET, and becomes an important item.
the case where current limiting is calculated -- Rds or Zds -- which should be used?
Application:Sandy Bridge, Ivy Bridge
Power supply：tps51219 and CSD87350Q5D
Vin:5V
Vout:0.675V
Thank you
