How to Use MT3608: Examples, Pinouts, and Specs

The MT3608 is a step-up (boost) voltage regulator module designed to provide a higher output voltage than the input voltage it receives. This component is widely used in battery-powered devices, portable electronics, and any application where voltage boosting is required to power electronics that operate at a higher voltage than the power source can provide.

• Powering 5V or 12V devices from a lower voltage battery
• Driving LED strings that require a higher operating voltage
• Portable power supplies for electronic devices
• Energy harvesting and solar-powered circuits

• Input Voltage Range: 2V to 24V
• Maximum Output Voltage: 28V (adjustable via onboard potentiometer)
• Maximum Switch Current: 2A
• Efficiency: Up to 93%
• Switching Frequency: 1.2MHz
• Built-in over-temperature protection

1. Connect the input voltage source to the VIN and GND pins.
2. Connect the load to the VOUT and GND pins.
3. Adjust the onboard potentiometer to set the desired output voltage. Use a multimeter to monitor the output voltage while adjusting.
4. Ensure that the input voltage is at least 2V to start the boost conversion process.

• Do not exceed the maximum input voltage of 24V to prevent damage to the module.
• The output voltage must be set higher than the input voltage for the module to operate correctly.
• Avoid loading the module beyond its maximum switch current of 2A.
• Provide adequate cooling if the module is expected to operate near its maximum ratings.
• Keep the input and output wiring as short as possible to minimize losses and electromagnetic interference.

• Output voltage is lower than expected: Ensure that the input voltage is sufficient and the potentiometer is correctly adjusted.
• Module is overheating: Check if the current draw is within the module's limits and improve cooling if necessary.
• No output voltage: Verify connections and input voltage, and ensure the module is not damaged.

• If the output voltage cannot be adjusted, replace the potentiometer or the entire module if necessary.
• In case of overheating, reduce the load or improve heat dissipation with a heatsink or better airflow.
• For no output, double-check wiring and solder joints for any faults or loose connections.

The MT3608 does not require any code to operate as it is not a programmable device. However, if you wish to monitor the output voltage using an Arduino UNO, you can use the following code to read the voltage through an analog input pin.

const int analogPin = A0; // Analog input pin connected to VOUT of MT3608
const float referenceVoltage = 5.0; // Reference voltage of Arduino UNO

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(analogPin); // Read the analog value
  float voltage = sensorValue * (referenceVoltage / 1023.0); // Convert to voltage
  Serial.print("Output Voltage: ");
  Serial.println(voltage);
  delay(1000); // Wait for a second before reading again
}

Remember to use a voltage divider if the output voltage of the MT3608 is expected to exceed the reference voltage of the Arduino UNO to prevent damage to the microcontroller.