DC-DC Buck-Boost Converter (CN3903)

parts help
1

Name of the part:
DC-DC Buck-Boost Converter (CN3903)

Previous work, similar parts:
Many small DC-DC converter modules exist as Fritzing parts, such as the Mini-360 (buck) and MT3608 (boost) modules. This part is a buck-boost converter, capable of both stepping up and stepping down voltage, which makes it distinct. The form factor is similar to other miniature power modules.

Top view:

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Datasheet:
This is a generic module based on the CN3903 integrated circuit. The official datasheet for the IC can be found here:

Product pages provide the module’s specific operational specs:

Key Specifications:

  • Input Voltage: 3V - 15V DC
  • Output Voltage: Fixed 5V DC
  • Output Current: Up to 600mA
  • Chip: CN3903

Type:
Breakout board, sub assembly, plug in module (Other: DC-DC Power Converter)

Footprint:
The board features four main solder pads/castellated holes for input and output connections. The back of the board is clearly marked.

  • IN+: Positive Voltage Input
  • IN-: Negative Voltage Input (Ground)
  • OUT+: Positive Voltage Output (5V)
  • OUT-: Negative Voltage Output (Ground)
2

Since you appear to need many parts, I expect it is time for you to learn to make them for your self. For one or two parts it is better to let someone that already knows how to make them when you need large numbers you need to learn to make them yourself. These two tutorials apply to current Fritzing versions.

I lately learned there aren’t links to the videos in Old_Grey’s tutorial so you need to do a google search for the title and then they come up on YouTube.

Peter

3

Thanks for the link, you made my weekend.

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Great to see your part submission for the CN3903 buck-boost module, it’s neat that this single board handles both voltage step-up and step-down in the compact form factor everyone loves. When prototyping motion-sensing electronics, it might pair well with an LSM6DS33TR IMU for accurate orientation feedback while maintaining stable power regulation.