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Five tiny green circuit boards with silver inductors and blue potentiometers

JacobsParts Inc.

JacobsParts MP1584 3.3V 3A DC Buck Converter 5pcs

SKU CH-Q0J0-3W17B

Pack of five ultra-small buck modules that step 4.5-28V down to .8-20V at up to 3A peak

  • TypeCurrent
  • Input Voltage28 Volts
  • Compact 22x17mm module fits tight project spaces
  • Adjustable 0.8-20V output powers diverse low-power devices
  • Wide 4.5-28V input accepts varied power sources
  • Up to 92% efficiency reduces waste heat
  • 3A peak current handles demanding load spikes

Compact buck module for low-power projects

The JacobsParts MP1584 is a synchronous step-down converter measuring 22 by 17 by 4 mm. It accepts 4.5 to 28 V input and delivers an adjustable 0.8 to 20 V output, making it suited for LED lighting, micro-controller supplies and battery chargers. Five units are included in the pack.

Efficient operation with minimal heat and noise

Synchronous rectification enables up to 92 % efficiency depending on the input-to-output differential. The design generates little waste heat so the module runs cool and silent during typical low-current use. No-load ripple stays below 30 mV at a 1.0 MHz switching frequency.

Steady 1.5 A sustained output under load

The regulator handles 3 A peak current but is rated for 1.5 A continuous without exceeding thermal limits. Voltage is set via the onboard potentiometer and remains stable during extended operation. Reverse polarity and back-feeding must be avoided to prevent damage.

Highlights

  • Compact 22x17mm module fits tight project spaces
  • Adjustable 0.8-20V output powers diverse low-power devices
  • Wide 4.5-28V input accepts varied power sources
  • Up to 92% efficiency reduces waste heat
  • 3A peak current handles demanding load spikes

Specifications

TypeCurrent
Input Voltage28 Volts

Questions about this item

How do I install the MP1584 buck module and what wiring mistake should I avoid?

Solder wires to the input and output pads, set the on-board potentiometer for the desired voltage between 0.8 and 20 V, and never apply reverse polarity or back-feed power through the module.

What maintenance or replacement will the MP1584 module need over time?

No scheduled maintenance is required; if the MP1584 IC or the potentiometer fails after prolonged use, replace the entire 22 x 17 mm module.

What is the first limit I will hit when running the MP1584 continuously at high load?

The sustained output current is capped at 1.5 A, so that thermal ceiling appears before the 3 A peak rating.

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