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I have lm2576 switching regulator circuit with output constant 5v/3A. Can I use it with a 12V battery and connect it to power my Arduino?

Bence Kaulics
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rezhart
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  • See [Choosing power supply, how to get the voltage and current ratings?](http://electronics.stackexchange.com/questions/34745/) to clear up your apparent confusion about how power supplies are specified. Aside from that you'll also need to know the current capability of your 12 V battery to know whether it can supply enough power for your load. – The Photon Apr 11 '16 at 00:41
  • @ThePhoton my supply capable current lest than 1.8A... from the links you provide i understand that current depends on the load, right? So, i thinks its ok with this.. im only scaring with the word "constant" before – rezhart Apr 11 '16 at 00:52
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    As long as the total load doesn't need more than about 18 W (assuming the converter is 85% efficient). – The Photon Apr 11 '16 at 00:53

1 Answers1

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If you are using something like the Arduino Uno that has a power jack, you can just directly connect the 12V to the power jack as the Arduino has an internal voltage regulator (although not a buck converter I believe).

Or you could use the buck converter IC (Lm2576) you mentioned and follow figure 1 exactly from the datasheet and place the output through USB or the 5V pin instead.

Bence Kaulics
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Bradman175
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