TPS54260: Maximum current of TPS54260

Hello Charlie, 

It looks like there is no maximum specification in the datasheet, but I do expect some variation from the typical. 

However, based on the min, it looks like the current limit can trip at 3.5A peak current in some corner cases. Keep in mind that this is the peak current seen by the high side MOSFET, which also depends on the inductor used (e.g. inductor ripple current). 

The part is suitable for 2.5A DC load current. If you have peak currents in the 7.6A range it does not look like this is a suitable part for this application. 

Regards, 

Denislav

Hello Charlie, 

It depends. Both values are important. 

For example:

The minimum limit affects the possible output current before current limit trips. This puts constraints on the minimum inductor value so the ripple is not too large to prematurely trip the min current limit spec. 

The maximum limit affects the rating of your inductor. Your inductor should be rated for the maximum current limit specification so that it does not saturate if you get a part with such current limit value. 

Regards, 
Denislav