How to Use TP5100: Examples, Pinouts, and Specs

The TP5100, manufactured by Electronics Hut (Part ID: CHMOD), is a high-efficiency linear voltage regulator designed for low-dropout applications. It provides a stable and reliable output voltage with minimal power loss, making it ideal for battery-powered devices. The TP5100 is equipped with features such as thermal protection, adjustable output voltage, and high efficiency, ensuring optimal performance in a wide range of applications.

• Battery-powered devices (e.g., portable electronics, IoT devices)
• Power management in embedded systems
• Low-dropout voltage regulation for sensitive circuits
• Applications requiring thermal protection and high efficiency

1. Power Input: Connect the input voltage (4.5V to 18V) 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 ADJ pin to set the desired output voltage. Refer to the formula in the datasheet for precise calculations.
3. Enable Pin: Connect the EN pin to a logic high signal (e.g., 3.3V or 5V) to enable the regulator. Pulling this pin low disables the output.
4. Output Connection: Connect the load to the VOUT pin. Ensure the load does not exceed the maximum output current of 2A.
5. Ground Connection: Connect the GND pin to the circuit ground.

• Thermal Management: Ensure proper heat dissipation by using a heatsink or placing the component on a PCB with adequate thermal vias.
• Input Capacitor: Place a low-ESR capacitor (e.g., 10µF) close to the VIN pin to stabilize the input voltage.
• Output Capacitor: Use a low-ESR capacitor (e.g., 22µF) at the VOUT pin to ensure stable operation and reduce output noise.
• Enable Pin: If the enable function is not required, connect the EN pin to VIN to keep the regulator always enabled.

The TP5100 can be used to power an Arduino UNO by regulating a higher input voltage (e.g., 12V) down to 5V. Below is an example circuit and Arduino code to control the EN pin.

• Connect a 12V power source to the VIN pin.
• Connect the VOUT pin to the Arduino UNO's 5V input.
• Use a GPIO pin from the Arduino to control the EN pin.

// Define the pin connected to the TP5100 EN pin
const int enablePin = 7;

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

  // Enable the TP5100 by setting the pin HIGH
  digitalWrite(enablePin, HIGH);

  // Optional: Add a delay to allow the regulator to stabilize
  delay(100);
}

void loop() {
  // The TP5100 remains enabled in this example
  // Add your main code here
}

1. Can the TP5100 handle 3.3V output?

   • Yes, the TP5100 can be configured for 3.3V output using the appropriate resistor divider.

2. What happens if the input voltage exceeds 18V?

   • The TP5100 may be damaged. Always ensure the input voltage is within the specified range.

3. Is the TP5100 suitable for powering microcontrollers?

   • Yes, the TP5100 is ideal for powering microcontrollers due to its stable output and low dropout voltage.

4. Can I leave the ADJ pin unconnected?

   • No, the ADJ pin must be connected to a resistor divider to set the output voltage.