Buck Converter - 8-20V to 5V/3A

This is a high grade DC Buck converter that inputs 8 to 12V and outputs 5V up to 3A or 15W. With good thermal performance and protection, this DC block is perfect for battery applications (such as SLAs or LFPs) that need to power a USB or 5V device even while the input is varying (battery charge/discharge). 89% efficiency makes this a high-efficiency, plug and play, DC Step Down solution.

  • Input Voltage: 8 to 20VDC
  • Input Current: 3ADC max
  • Quiescent Current: 12.5mA
  • Efficiency: 89%
  • Output Voltage Accuracy: ±1%
  • Load Regulation: ±2%
  • Ripple: 30mVp-p


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • xsk8rat / about 3 years ago / 1

    What's an SLA or a LFP? Thanks, Mark

    • Sealed lead acid, Lithium iron phosphate (LiPo).

      Looks like Sparkfun has gotten into selling junk products without evaluating them, joining the race to the bottom with Amazon, Newegg, etc. Too bad.

      • jwshields / about 2 years ago * / 1

        I'm going to purchase this and see how it fares, will report back. But, I agree here, it's sad to see random chinese products that are just... out of place here.

  • Member #387364 / about 3 years ago / 0


Customer Reviews

2 out of 5

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1 of 2 found this helpful:

No Output Voltage at 7.5V

I know the title says 8-20V but the description says 6-20V so I gave it a whirl. I have a 7.5V battery and it did not work. I hooked it up to a 9V power source and it works. Stick to the 8V minimum not 6V. I have no real review as it is of no use to me.