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LM3150: max ouput current definition

Part Number: LM3150
Other Parts Discussed in Thread: LM25145, LM5146, LM5145, LM25148

I am uisng LM3150, so far it is good. But I am curious one thing,

My understanding, LM3150 max drive current shoud be decided by MOSFET, and sample res? But in the datasheet, it says that "The LM3150 SIMPLE SWITCHER®
controller is aneasy-to-use and simplified step-down powercontroller capable of providing up to 12 A of output urrent in a typical application
". I can't understand. 

Seems that it is common question for DC2DC controller. In the datasheet, most have max curernt limit. Why have the definition?

Best Regards,


  • Hi Kent,

    There should be no finite limit to the output current capability as it really depends on the power-stage components. The LM25145 (42V), along with the LM5145 (75V) and LM5146 (100V), is out highest performing general-purpose controller family - I would recommend it over the LM3150. See also the LM25148/9 if current-mode control is preferable.