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Tiny green circuit board with solder pads and black components, 22 by 17 mm

JacobsParts Inc.

JacobsParts Inc. MP1584 5V 3A buck module 4.5-28V input

SKU CH-W1S4-PDARS

Ultra-small 22×17×4 mm buck module converts 4.5–28 V to fixed 5 V at 1.5 A sustained with up to 92 % efficiency

  • Supply voltage28 V
  • Product type5 V
  • Fixed 5 V output simplifies USB-power projects
  • Ultra-compact 22×17×4 mm module fits tight spaces
  • Wide 4.5–28 V input suits battery or wall supplies
  • Synchronous rectification reaches up to 92 % efficiency
  • 0 MHz switching keeps ripple below 30 mV

Fixed 5V 3A buck module for USB-powered devices

The JacobsParts MP1584 module steps a 4.5-28V supply down to a fixed 5V output rated at 3A peak and 1.5A sustained. Its ultra-small 22x17x4mm footprint suits tight enclosures where a standard USB power adapter will not fit. The non-isolated synchronous design reaches up to 92% efficiency.

Verify input range and current budget before

Confirm the source voltage stays between 4.5V and 28V and that the load never exceeds 1.5A continuous or 3A peak. The regulator has no adjustment potentiometer, so the 5V output cannot be trimmed. Reverse polarity or back-feeding the output will damage the IC, so protect the input accordingly.

Sustained load limited to 1.5A with low ripple

Under continuous draw the module delivers 1.5A while maintaining under 30mV ripple at no load and 1.0MHz switching frequency. Efficiency drops as the input-to-output differential widens, so thermal headroom shrinks at higher supply voltages. The peak 3A rating is only for short transients, not steady operation.

How it compares

Measured against everything we stock in AC Adapters & Power Bricks, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 97% of the 3,875 comparable items (median $23.99).

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Specifications

Product
Model nameDCMOD-I-5 V
Product type5 V
Power
Supply voltage28 V

Questions about this item

Does the 5‑pack include header pins or cables, or must they be purchased separately?

The listing supplies five bare MP1584 buck modules only; header pins, wires or USB connectors are not included and must be sourced separately.

Why choose the fixed 5 V 3 A peak version instead of an adjustable regulator?

Fixed 5 V output removes the need for trimming and guarantees the exact voltage USB‑powered devices expect, while still delivering 3 A peak and 1.5 A sustained current.

What does the 92 % efficiency figure mean when the module is running at 1.5 A sustained load?

At 1.5 A sustained output the converter typically reaches up to 92 % efficiency, so only about 8 % of input power becomes heat, keeping the 22 × 17 mm board cool.

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