MT3608 Step-Up Adjustable DC-DC Switching Boost Converter – Support Documentation
Overview
The MT3608 is a compact, high-efficiency, non-isolated DC-DC boost converter module designed to step up input voltages ranging from 2V to 24V to output voltages between 5V and 28V. Capable of delivering up to 2A of output current, it’s ideal for applications requiring higher voltages from low-voltage sources, such as battery-powered devices, portable electronics, and DIY projects.
Features
- Input Voltage: 2V to 24V DC
- Output Voltage: 5V to 28V DC (adjustable via onboard potentiometer)
- Maximum Output Current: 2A
- Efficiency: Up to 93%
- Switching Frequency: 1.2MHz
- Protection Features: Under-voltage lockout, current limiting, thermal overload
- Soft Start Function: Reduces inrush current at startup
- Compact Size: Approx. 36mm x 17mm x 7mm
Pinout Table
| Label | Function |
|---|---|
| VIN+ | Positive input voltage (2V–24V DC) |
| VIN− | Ground (0V) for input voltage |
| VOUT+ | Positive output voltage (5V–28V DC) |
| VOUT− | Ground (0V) for output voltage |
| POT | Multi-turn potentiometer for output voltage adjustment |
How to Use
- Connect Input Voltage: Connect power source positive to VIN+ and ground to VIN− (2V–24V).
- Adjust Output Voltage:
- Turn the potentiometer counterclockwise ~20 turns before powering.
- Power the module and monitor VOUT with a multimeter.
- Turn the potentiometer clockwise slowly to increase output voltage.
- Connect Load: Attach your load to VOUT+ and VOUT− once desired voltage is set.
Note: The output voltage must always be higher than the input voltage.
Applications
- Powering microcontrollers and sensors from lower voltage batteries
- Portable electronic devices
- DIY electronics projects
- Solar-powered systems
- LED drivers
- Charging circuits
Troubleshooting
No Output Voltage
- Check if the input voltage is within range and polarity is correct.
- Inspect for short circuits or poor connections.
Output Voltage Not Adjustable
- Verify potentiometer functionality.
- Ensure module is powered during adjustment.
Module Overheating
- Reduce load to stay within 2A output current.
- Improve ventilation or add a heatsink.
Safety Precautions
- Set output voltage before connecting load.
- Do not exceed 24V input voltage.
- Always maintain output voltage higher than input voltage.
- Avoid short circuits on output.