M5Stack 5V Buck Converter Unit (ME3116AM6G)

The M5Stack 5V Buck Converter Unit converts a 6–24 V DC source into a regulated 5 V output for compact embedded systems, sensor nodes, and bench prototypes. Its ME3116AM6G step-down converter, DC barrel input, Grove output, and power indicator make it useful when an available adapter or battery voltage is higher than the 5 V required by a controller or peripheral. It provides a simple power stage while keeping polarity, current, heat, wiring, and protection decisions visible to the system designer.

What You Can Power

• 5 V M5Stack controllers and compatible Grove peripherals within the current budget.
• Sensor nodes supplied from 9 V, 12 V, or 24 V DC adapters.
• Portable prototypes using a higher-voltage battery pack.
• Bench fixtures that need a compact regulated 5 V branch.
• Embedded demonstrations of DC-DC step-down conversion.

Key Capabilities

• Accepts 6–24 V DC input through a DC-015 barrel jack.
• Provides a regulated 5 V ±5% output through HY2.0-4P.
• Supports loads up to 1 A when input, cooling, cabling, and ambient conditions are suitable.
• Uses an efficient switching buck architecture rather than a linear regulator.
• Includes a red LED to indicate input power.

Setup and Integration

1. Confirm the adapter voltage, connector size, and barrel polarity before connection.
2. Estimate the controller, display, radio, sensor, and startup-current demand of the complete 5 V load.
3. Connect the load with power removed, then verify the 5 V output before attaching sensitive electronics.
4. Run the final system at maximum expected load and check cable drop, converter temperature, and supply stability.

Example Workflow

1. Apply a current-limited 6–24 V input with the correct polarity.
2. Measure the unloaded output and confirm that it is close to 5 V.
3. Connect the intended load and monitor voltage during startup and peak activity.
4. Add an input fuse or other protection appropriate to the source and enclosure.

Deployment Notes

• The converter is non-isolated; input and output share a common ground.
• Do not exceed the input range, reverse the barrel polarity, or treat the output as USB Power Delivery.
• The 1 A rating is a maximum operating target, not a guarantee for every enclosure and ambient temperature.
• Automotive and industrial power lines can contain surges that require additional transient protection.
• Use wiring and connectors rated for the expected current and temperature rise.

Development Resource

• M5Stack U125 Documentation