How to Use Adafruit MPM3610 5V: Examples, Pinouts, and Specs

The Adafruit MPM3610 5V is a compact, high-efficiency, synchronous buck converter module designed to step down a higher voltage to a regulated 5V output. This module is ideal for powering 5V electronics from a higher voltage source, making it perfect for battery-powered applications, portable devices, and microcontroller platforms such as the Arduino.

• Powering 5V USB devices
• Supplying 5V to microcontrollers and sensors
• Battery-powered projects requiring a stable 5V supply
• IoT devices with power efficiency needs

• Input Voltage: 6V to 21V
• Output Voltage: 5V DC
• Maximum Output Current: 1.2A
• Efficiency: Up to 95%
• Quiescent Current: 0.5mA typical
• Switching Frequency: 2MHz
• Operating Temperature: -40°C to +85°C

1. Connect the input voltage (6V to 21V) to the VIN pin.
2. Connect the ground from your power supply to the GND pin.
3. The VOUT pin will provide a regulated 5V output.
4. Optionally, connect the EN pin to a digital output of a microcontroller to enable or disable the converter programmatically.

• Ensure that the input voltage does not exceed 21V to prevent damage.
• Do not exceed the maximum output current of 1.2A.
• Place the module close to the power input of your circuit to minimize losses.
• Use decoupling capacitors close to the power inputs of sensitive components.
• If using the EN pin, ensure it is pulled high to enable the module or low to disable it.

// Example code to enable and disable the Adafruit MPM3610 5V module using an Arduino UNO

const int enablePin = 7; // Connect the EN pin of the module to digital pin 7

void setup() {
  pinMode(enablePin, OUTPUT); // Set the enable pin as an output
}

void loop() {
  digitalWrite(enablePin, HIGH); // Enable the MPM3610 module
  delay(5000);                  // Wait for 5 seconds

  digitalWrite(enablePin, LOW);  // Disable the MPM3610 module
  delay(5000);                  // Wait for 5 seconds
}

• No Output Voltage: Ensure that the input voltage is within the specified range and that all connections are secure.
• Output Voltage Drops Under Load: Check if the current draw is within the module's limit of 1.2A.
• Module Overheating: Reduce the load if the module is too hot or improve ventilation/cooling.

• Verify that the input voltage is stable and within the specified range.
• Check for any shorts or poor connections in the circuit.
• Ensure that the EN pin is properly controlled; it should be high for normal operation.
• Use a multimeter to check the output voltage and current.

Q: Can I use the MPM3610 to power a 5V USB device? A: Yes, as long as the device's current draw is below 1.2A.

Q: What should I do if the module is not outputting 5V? A: Check the input voltage, connections, and ensure the EN pin is pulled high.

Q: Is it possible to adjust the output voltage? A: No, the output voltage is fixed at 5V.

Q: Can I use multiple MPM3610 modules in parallel to increase the current output? A: It is not recommended to parallel buck converters due to potential current sharing issues.

For further assistance, contact Adafruit support or refer to the community forums for additional help.