I want to clarify the statement on LM2596 Datasheet.
It states one of its feature is Ensured 3A Output Load Current.

My question is related to the Adjustable version of LM2596
Vin: 4.5V-40V
Vout: 3.3V-37V

Does the above statement means:
No matter what voltage the input is (as long it is still in Vin range and higher than Vout), the LM2596 will still regulate with 3A output load current?

Extreme cases:
Vin: 40V and Vout: 3.3V, and
Vin: 40V and Vout: 37V
Can LM2596 regulate both cases with 3A output load current? If not, please provide me info or chart that show varying load current based on Vin and Vout.

Side notes: My reason to ask these question is because I think LM2596 should have max power rating (I can't find one yet from Datasheet), thus 37V@3A would be more than 100W. And I think the power is too big for such small IC.

• The 3.3V curve is at about 73% with a Vin of 40V. 3.3V⋅3A⋅(1/.73−1)$\approx$3.66W Sep 25, 2015 at 6:03