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LT1166 Current Limit Function

Question asked by Kazu on Feb 18, 2018
Latest reply on Mar 2, 2018 by Fil

Hi All,


Here is a question about the current limit if the LT1166. My circuit is almost the same as Figure 9. in the datasheet

and I have attached it. I'd like the current limit to work more than 1A so I selected the 1.3 ohm Rsense.

However the output current clamped about 3.6A peak as attached LTSpice simulation result [V(n012)=Vin, V(n009)=Vout, I(R9)=Iout].  Why is not the output current clamped about 1A? Is my understanding about the current limit function wrong?