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TPS40051 Current Limit

Dear TI

I'd like to know a current limit characteristic of below spec whether Isink is shifted by temperature or not .

Because customer is using on below schematic like pulse modulation.

From above conditon, current limit of VLIM will be 8.7V by calculation, but hit current limit at 9.7V as actual on 25degC like below.

I'd like to know this gap is come from sample variation or mistake for setting current limit or IC design.

Thank you for your cooperation.

Best Regards

K.Narisawa