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Five tiny green circuit boards 22 by 17 mm each with surface-mount components and pin headers

JacobsParts Inc.

JacobsParts DCMOD-I-3V 5pcs MP1584 3.3V 3A Buck Module 22x17mm

SKU CH-6GCG-BK128

Five 22×17 mm buck modules deliver fixed 3.3 V at 1.5 A sustained from 4.5–28 V input with up to 92 % efficiency

  • Typebuffer_44254
  • Input Voltage28 Volts
  • 3V fixed output simplifies 3.3V rail design
  • 22×17×4mm ultra-small footprint fits tight layouts
  • 5–28V input accepts diverse DC sources
  • Up to 92% efficiency reduces waste heat

Compact 3.3V regulator for microcontrollers

This fixed-output buck module delivers 3.3V from a 4.5-28V source in a 22x17mm footprint. It suits ESP8266 projects and battery-powered designs that normally run from two AA cells. The non-isolated topology keeps wiring simple for low-voltage control boards.

Synchronous rectification frees thermal headroom

Synchronous rectification pushes efficiency up to 92% and reduces waste heat compared with diode-based converters. The 1.0MHz switching frequency allows a tiny inductor, so the board fits tight enclosures without a heatsink. Peak rating reaches 3A while sustained output is 1.5A.

Ripple stays below 30mV under steady load

At continuous 1.5A the module maintains <30mV ripple with no load, and synchronous operation limits temperature rise during long runs. The fixed 3.3V output removes adjustment drift. Input must stay within 4.5-28V and reverse polarity must be avoided.

Highlights

  • 3V fixed output simplifies 3.3V rail design
  • 22×17×4mm ultra-small footprint fits tight layouts
  • 5–28V input accepts diverse DC sources
  • Up to 92% efficiency reduces waste heat

Specifications

BrandJacobsParts
ModelDCMOD-I-3V
Typebuffer_44254
Input Voltage28 Volts

Questions about this item

How much sustained current can the MP1584 buck module deliver before thermal limits become the bottleneck?

The module is rated for 1.5A sustained output; exceeding this can cause overheating as the small 22x17mm board has limited heat dissipation.

What is the typical ripple and efficiency when the converter runs continuously at full load?

Ripple is specified as <30mV at no load; efficiency reaches up to 92% but drops as the input-to-output voltage differential increases, raising heat.

Which input voltage range and wiring must already be in place for this fixed 3.3V regulator to operate?

A DC source between 4.5V and 28V with correct polarity is required; the output is fixed at 3.3V and cannot be adjusted.

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