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LM43602 - Vin-min condition

Other Parts Discussed in Thread: LM43602

Hi all

Would you mind if we ask LM43602?

The data sheet shows the Vin-min condtion which is  "Vin-min = Vout / (1 - (Fs * Toff-min))".
Of course, we recognize there is the duty limitation as above.

On the other hand, should we consider the following formula( Iout*Rds(on(highsideFET)+RL))?
-VIN(min) = VOUT(min)+Iout(Rds(on)+RL)

Kind regards,

Hirotaka Matsumoto