Tool/software:
Team,
My customer needs to design Buck power stage
- KL30 input
- 2.2MHz
- 3.3Vout
- Load max nominal 1.2A
- under Vout short condition, current must never be higher than 2A.
- automotive IC needed
I look at devices like LM63610-Q1 or LM63615-Q1, but I'm not sure how to evaulate high side / low side FET current limtis vs. max current that might be seen at LC output stage point... please advice.
Hello
The maximum current for that family of devices can be calculated with equation #3 in the image below.
For both '10 and '15 we have:
Ioutmax ~ (2.7+2.12)/2 = 2.4A (max)
~ (2.25+1.8)/2 = 2.03A (typ)
For many of our devices it can be calculated in the same way.
It is best to check the data sheet.
Thanks
Frank, thanks!
Additional question:
Following your feedback, and taking LMQ66410-Q1 into consideration
Would LMQ66410-Q1 be suitable for 1.1A DC load, as this is below Iout_max_min?
Hello
Yes; but as you can see your calculation is cutting it rather close 
Would be your judgement call, but should be OK.
Thanks
