TPS25942A: Temperature Questions

Part Number:TPS25942A

Hello,

I’m hoping you can help provide some additional specifications (or clarification) for the TPS25942 over temperature.

Here’s some things I’m hoping to clarify (there may be more later):

1. The I(FASTRIP) specification:  States 1.5 x I(LIM) + 0.375.  This has notes (1) and (2).  Note (2) indicates that thermal effects must be taken into account separately.  What does this mean?  What is the tolerance of I(FASTRIP) over temperature?

1. I looked at the tolerance of I(LIM) and realized that it was basically +/-8% for the current limit resistors given in the datasheet.  Can I assume these same tolerances on the fast-trip limit since the fast-trip equation refers to I(LIM), or is the tolerance wider for the fast-trip?

• The Ron range is listed as 26mohm to 64mohm from -40C to 125C.  Is this positive temperature coefficient (higher temp, results in higher resistance)?

Regards,

David