TL431AIDBZR

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 Stability

Package: SOT-23-3

Essence: The TL431AIDBZR is a three-terminal adjustable precision shunt regulator. It is commonly used as a voltage reference in various electronic circuits.

Packaging/Quantity: The TL431AIDBZR is available in tape and reel packaging, with 3000 units per reel.

Specifications

The TL431AIDBZR has the following specifications:

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

Pin Configuration

The TL431AIDBZR has three pins:

1. Anode (A): Connected to the positive supply voltage.
2. Cathode (K): Connected to the load or ground.
3. Reference (R): Provides the regulated output voltage.

Functional Features

• Adjustable Output Voltage: The TL431AIDBZR allows for precise adjustment of the output voltage according to the application requirements.
• Programmable Shunt Regulator: It acts as a programmable shunt regulator, providing a stable reference voltage for other components in the circuit.
• Low Dynamic Output Impedance: The low dynamic output impedance ensures a stable 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 Stability: The TL431AIDBZR offers high initial accuracy and temperature stability, ensuring reliable performance over time.

Advantages and Disadvantages

Advantages: - Precise voltage regulation - Wide operating current range - High accuracy and stability - Compact SOT-23-3 package

Disadvantages: - Limited maximum output voltage (36V) - Requires external components for proper operation

Working Principles

The TL431AIDBZR works based on the principle of a shunt regulator. It compares the reference voltage at the Reference (R) pin with the voltage across the Anode (A) and Cathode (K) pins. By adjusting the resistance connected to the Cathode (K) pin, the output voltage can be precisely regulated.

Detailed Application Field Plans

The TL431AIDBZR finds applications in various fields, including:

1. Power Supply Regulation: It is commonly used in power supply circuits to provide stable reference voltages for voltage regulators and feedback control.
2. Battery Charging Systems: The TL431AIDBZR ensures accurate voltage regulation in battery charging systems, preventing overcharging or undercharging.
3. Audio Amplifiers: It can be used in audio amplifiers to maintain a constant bias voltage, improving overall audio performance.
4. Voltage Monitoring: The TL431AIDBZR is utilized in voltage monitoring circuits to trigger alarms or shutdown systems when the voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

Some alternative models to the TL431AIDBZR include:

1. LM4040CIZ-5.0/NOPB: Precision Shunt Regulator, 5.0V Reference Voltage, TO-92 Package.
2. REF3030AIDBZT: Adjustable Precision Shunt Regulator, 1.24V to 10V Reference Voltage, SOT-23-3 Package.
3. LT1004CZ-2.5#PBF: Precision Shunt Regulator, 2.5V Reference Voltage, TO-92 Package.

These alternative models offer similar functionality and can be used as replacements depending on the specific requirements of the application.

In conclusion, the TL431AIDBZR is a versatile voltage reference IC with adjustable output voltage, high accuracy, and stability. It finds applications in power supply regulation, battery charging systems, audio amplifiers, and voltage monitoring circuits. With its compact package and wide operating current range, it is a popular choice among electronic designers.