How to Use XL6019E1 DC-DC step-up/step-down: Examples, Pinouts, and Specs

The XL6019E1 is a versatile DC-DC converter capable of both step-up (boost) and step-down (buck) voltage regulation. This flexibility makes it ideal for applications requiring stable voltage output across varying input conditions. It is widely used in power supply systems, battery-powered devices, LED drivers, and industrial control systems. Its high efficiency and wide input voltage range make it a reliable choice for both hobbyist and professional projects.

• Battery-powered devices requiring stable voltage output
• LED lighting systems
• Solar power systems
• Industrial control systems
• General-purpose power supply modules

The XL6019E1 is designed to handle a wide range of input and output voltages, making it suitable for diverse applications. Below are its key technical specifications:

The XL6019E1 has a 5-pin configuration. Below is the pinout and description:

1. Input Voltage Connection: Connect the input voltage source (5V to 32V) to the VIN pin. Ensure the input voltage is within the specified range.
2. Output Voltage Adjustment: Use a resistor divider network connected to the FB pin to set the desired output voltage. The formula for output voltage is: [ V_{OUT} = V_{REF} \times \left(1 + \frac{R1}{R2}\right) ] where ( V_{REF} ) is typically 1.25V.
3. Inductor and Diode Selection: Choose an appropriate inductor and Schottky diode based on the input/output voltage and current requirements. Refer to the datasheet for recommended values.
4. Enable Pin: Connect the EN pin to a high logic level (e.g., VIN) to enable the module. Pull it low to disable the module.
5. Heat Dissipation: For high-current applications, ensure proper heat dissipation using a heatsink or adequate PCB thermal design.

The XL6019E1 can be used to power an Arduino UNO by stepping down a higher voltage (e.g., 12V) to 5V. Below is an example circuit and Arduino code to monitor the output voltage.

• Connect a 12V power source to the VIN pin of the XL6019E1.
• Set the output voltage to 5V using a resistor divider on the FB pin.
• Connect the GND pin of the XL6019E1 to the Arduino's GND.
• Connect the output of the XL6019E1 to the Arduino's 5V pin.

// This code reads the output voltage of the XL6019E1 using an analog pin
// and displays the value on the serial monitor.

const int voltagePin = A0; // Analog pin connected to the output voltage
const float referenceVoltage = 5.0; // Arduino reference voltage (5V)
const int adcResolution = 1024; // 10-bit ADC resolution

void setup() {
  Serial.begin(9600); // Initialize serial communication
  pinMode(voltagePin, INPUT); // Set the voltage pin as input
}

void loop() {
  int adcValue = analogRead(voltagePin); // Read the ADC value
  float outputVoltage = (adcValue * referenceVoltage) / adcResolution;
  
  // Print the output voltage to the serial monitor
  Serial.print("Output Voltage: ");
  Serial.print(outputVoltage);
  Serial.println(" V");
  
  delay(1000); // Wait for 1 second before the next reading
}

• Input Voltage: Ensure the input voltage is always higher than the minimum required for proper operation.
• Output Current: Do not exceed the maximum output current of 5A. Use proper heat dissipation for high-current applications.
• Inductor Selection: Use an inductor with sufficient current rating to avoid saturation.
• Feedback Resistors: Use precision resistors for accurate output voltage regulation.

1. No Output Voltage

   • Cause: The EN pin is not connected or is pulled low.
   • Solution: Ensure the EN pin is connected to a high logic level (e.g., VIN).

2. Output Voltage is Incorrect

   • Cause: Incorrect resistor values in the feedback network.
   • Solution: Verify the resistor values and recalculate using the output voltage formula.

3. Overheating

   • Cause: Excessive current draw or insufficient heat dissipation.
   • Solution: Use a heatsink or improve PCB thermal design. Ensure the load current does not exceed 5A.

4. High Output Ripple

   • Cause: Poor capacitor selection or layout issues.
   • Solution: Use low-ESR capacitors and ensure proper PCB layout.

1. Can the XL6019E1 be used for both step-up and step-down applications?

   • Yes, the XL6019E1 is designed for both boost and buck voltage regulation.

2. What is the maximum efficiency of the XL6019E1?

   • The XL6019E1 can achieve up to 96% efficiency, depending on the load and input/output conditions.

3. Can I use the XL6019E1 with a 3.3V microcontroller?

   • Yes, but ensure the output voltage is set to 3.3V and the input voltage is within the specified range.

4. What type of diode should I use with the XL6019E1?

   • Use a high-speed Schottky diode with a current rating equal to or greater than the load current.

By following this documentation, you can effectively integrate the XL6019E1 into your projects and troubleshoot common issues.