How to Use 5v Boost Converter: Examples, Pinouts, and Specs

The 5V Boost Converter (Manufacturer: Adafruit, Part ID: TPS61023) is a DC-DC step-up converter designed to increase a lower input voltage to a stable 5V output. This component is ideal for powering devices that require a consistent 5V supply, even when the input voltage is lower, such as in battery-powered applications. Its compact design and high efficiency make it a popular choice for portable electronics, IoT devices, and embedded systems.

• Powering microcontrollers (e.g., Arduino, Raspberry Pi) from batteries
• Extending the life of single-cell Li-ion or alkaline batteries
• Portable USB-powered devices
• Wearable electronics
• Low-power IoT devices

The following table outlines the key technical details of the Adafruit TPS61023 5V Boost Converter:

The 5V Boost Converter typically has the following pinout:

1. Connect the Input Voltage (VIN):

   • Attach the VIN pin to your power source, such as a single-cell Li-ion battery or a 2x AA battery pack.
   • Ensure the input voltage is within the range of 0.5V to 5.5V.

2. Connect the Ground (GND):

   • Connect the GND pin to the ground of your circuit.

3. Connect the Output Voltage (VOUT):

   • Attach the VOUT pin to the device or circuit requiring a 5V power supply.

4. Enable the Converter:

   • Pull the EN pin high (connect to VIN or a logic high signal) to enable the boost converter.
   • To disable the converter, pull the EN pin low or leave it unconnected.

5. Add Decoupling Capacitors:

   • Place a capacitor (e.g., 10µF) between VIN and GND to stabilize the input voltage.
   • Place another capacitor (e.g., 22µF) between VOUT and GND to smooth the output voltage.

• Input Voltage Limitations: Ensure the input voltage does not exceed 5.5V to avoid damaging the converter.
• Heat Dissipation: While the TPS61023 is efficient, it may generate heat under high load. Ensure proper ventilation or heat sinking if necessary.
• Load Current: The maximum output current depends on the input voltage. For example, at lower input voltages, the output current capability decreases.
• Noise Sensitivity: Use short, thick wires for connections to minimize noise and voltage drops.

The following example demonstrates how to power an Arduino UNO using the 5V Boost Converter and a 3.7V Li-ion battery.

• Connect the battery's positive terminal to the VIN pin of the boost converter.
• Connect the battery's negative terminal to the GND pin of the boost converter.
• Connect the VOUT pin of the boost converter to the 5V pin of the Arduino UNO.
• Connect the GND pin of the boost converter to the GND pin of the Arduino UNO.

// Example code to blink an LED on pin 13 of Arduino UNO
// This demonstrates the Arduino running on power supplied by the 5V Boost Converter.

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output pin
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. No Output Voltage:

   • Cause: The EN pin is not pulled high.
   • Solution: Ensure the EN pin is connected to VIN or a logic high signal.

2. Output Voltage is Unstable:

   • Cause: Insufficient decoupling capacitors.
   • Solution: Add capacitors (e.g., 10µF on VIN and 22µF on VOUT) to stabilize the voltage.

3. Excessive Heat:

   • Cause: High load current or poor ventilation.
   • Solution: Reduce the load current or improve airflow around the converter.

4. Low Efficiency:

   • Cause: Input voltage is too close to the output voltage.
   • Solution: Use a higher input voltage within the supported range for better efficiency.

Q: Can I use the 5V Boost Converter with a 1.5V AA battery?
A: Yes, the TPS61023 can boost a 1.5V input to 5V. However, the output current will be limited due to the low input voltage.

Q: Is the converter suitable for powering USB devices?
A: Yes, as long as the device's current requirement does not exceed the converter's maximum output current (1A).

Q: Can I leave the EN pin unconnected?
A: No, leaving the EN pin unconnected may cause the converter to remain disabled. Pull it high to enable the converter.

Q: What happens if the input voltage exceeds 5.5V?
A: Exceeding 5.5V can damage the converter. Always ensure the input voltage stays within the specified range.

This concludes the documentation for the Adafruit TPS61023 5V Boost Converter.