TL431BVDR2

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Programmable Output Voltage - Low Dynamic Output Impedance - Wide Operating Current Range - High Accuracy and Temperature Stability

Package: SOIC-8

Essence: The TL431BVDR2 is a precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.

Packaging/Quantity: The TL431BVDR2 is typically sold in reels of 2500 units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Coefficient: ±50ppm/°C
• Dynamic Output Impedance: 0.22Ω
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL431BVDR2 has 8 pins arranged as follows:

```

---

| | --| 1 |-- Anode --| 2 |-- Cathode --| 3 |-- Reference --| 4 |-- N/C (No Connection) --| 5 |-- N/C (No Connection) --| 6 |-- N/C (No Connection) --| 7 |-- N/C (No Connection) --| 8 |-- N/C (No Connection) |____| ```

Functional Features

• Programmable Output Voltage: The TL431BVDR2 allows the user to set the desired output voltage by connecting external resistors.
• Low Dynamic Output Impedance: This feature ensures stability and accuracy of the output voltage even with varying load conditions.
• Wide Operating Current Range: The device can operate within a wide range of current levels, making it suitable for various applications.
• High Accuracy and Temperature Stability: The TL431BVDR2 provides precise voltage references with minimal drift over temperature.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into circuits - Wide operating voltage and current range - High accuracy and stability - Low dynamic output impedance

Disadvantages: - Requires external resistors for voltage programming - Limited number of available pins for additional functionality

Working Principles

The TL431BVDR2 operates as a shunt regulator by comparing the reference voltage at its internal reference pin (pin 3) with an external voltage divider connected to the cathode (pin 2). By adjusting the resistance values in the voltage divider, the desired output voltage can be set. The TL431BVDR2 then regulates the current flowing through the cathode to maintain a stable output voltage.

Detailed Application Field Plans

The TL431BVDR2 is commonly used in various electronic systems where a stable reference voltage is required. Some typical application fields include:

1. Power Supplies: The TL431BVDR2 can be used as a voltage reference in power supply circuits to ensure stable and accurate output voltages.
2. Battery Charging Systems: It can be employed in battery charging circuits to provide a precise reference voltage for controlling the charging process.
3. Audio Amplifiers: The TL431BVDR2 can be utilized in audio amplifier circuits to maintain a constant bias voltage for improved performance.
4. Voltage Regulators: It can serve as a voltage reference in voltage regulator circuits to stabilize the output voltage under varying load conditions.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431BVDR2 are:

1. LM4040: Precision Shunt Voltage Reference
2. LT1009: Precision Reference
3. REF3030: Low Dropout Voltage Reference
4. MAX6126: Ultra-High-Precision Voltage Reference

These alternative models can be considered based on specific application requirements and availability.

Word count: 410 words