How to Use TPS61023: Examples, Pinouts, and Specs

The TPS61023 is a high-efficiency, synchronous boost converter designed to step up low input voltages to higher output voltages. It is particularly well-suited for applications powered by single-cell lithium-ion batteries. With its wide input voltage range (0.5 V to 5.5 V), adjustable output voltage, and integrated power switches, the TPS61023 is an excellent choice for portable and battery-powered devices. Its compact size and high efficiency make it ideal for applications such as wearable devices, IoT sensors, and portable medical equipment.

• Wearable electronics
• IoT devices and sensors
• Portable medical equipment
• Battery-powered devices
• Wireless communication modules

The TPS61023 is available in a 6-pin WSON package. Below is the pinout and description:

1. Input and Output Capacitors:

   • Place a low-ESR ceramic capacitor (e.g., 10 µF) close to the VIN pin to stabilize the input voltage.
   • Use a similar capacitor (e.g., 22 µF) at the VOUT pin to stabilize the output voltage.

2. Inductor Selection:

   • Choose an inductor with a saturation current higher than the peak current of the TPS61023.
   • A typical value is 1 µH to 2.2 µH, depending on the application.

3. Feedback Resistor Divider:

   • Use two resistors to set the output voltage via the FB pin. The output voltage is determined by the formula: [ V_{OUT} = V_{FB} \times \left(1 + \frac{R1}{R2}\right) ] where ( V_{FB} ) is typically 0.8 V.

4. Enable Pin:

   • Drive the EN pin high (logic level 1) to enable the device. Pull it low (logic level 0) to disable it.

5. PCB Layout:

   • Minimize the loop area of the input capacitor, inductor, and output capacitor to reduce noise.
   • Place the feedback resistors close to the FB pin to minimize noise interference.

The TPS61023 can be used to power an Arduino UNO from a single-cell lithium-ion battery. Below is an example circuit and Arduino code to enable the TPS61023.

• Connect the battery's positive terminal to the VIN pin.
• Connect the GND pin to the battery's negative terminal and the Arduino GND.
• Set the output voltage to 5 V using the feedback resistor divider.
• Connect the VOUT pin to the Arduino's 5 V input pin.

// Example code to enable the TPS61023 via the EN pin
// This code assumes the EN pin is connected to Arduino pin 7.

#define EN_PIN 7  // Define the EN pin connected to Arduino pin 7

void setup() {
  pinMode(EN_PIN, OUTPUT);  // Set EN pin as output
  digitalWrite(EN_PIN, HIGH);  // Enable the TPS61023
}

void loop() {
  // The TPS61023 remains enabled, providing 5 V to the Arduino.
  // Add your application code here.
}

• Ensure the input voltage does not exceed 5.5 V to avoid damaging the device.
• Select components (capacitors, inductors, resistors) with appropriate ratings for your application.
• Avoid long PCB traces for the SW pin to minimize EMI.

1. Can the TPS61023 output 5 V from a 1.8 V input?

   • Yes, the TPS61023 can boost a 1.8 V input to 5 V, provided the load current is within the device's capability.

2. What is the maximum output current?

   • The maximum output current depends on the input voltage and output voltage. Refer to the datasheet for detailed current capability charts.

3. Can I use the TPS61023 for 3.3 V output?

   • Yes, you can configure the feedback resistor divider to set the output voltage to 3.3 V.

4. How do I calculate the feedback resistors?

   • Use the formula ( V_{OUT} = V_{FB} \times (1 + R1/R2) ), where ( V_{FB} ) is 0.8 V.

By following this documentation, you can effectively integrate the TPS61023 into your designs and troubleshoot common issues.