TL431BQDBZR

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 - Low Temperature Drift - Low Output Noise

Package: SOT-23-3

Essence: The TL431BQDBZR is a three-terminal adjustable precision shunt regulator. It can be used as a voltage reference or as a precision voltage divider.

Packaging/Quantity: The TL431BQDBZR is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Initial Accuracy: ±0.5%
• Temperature Stability: ±50ppm/°C
• Output Voltage Tolerance: ±0.4%
• Dynamic Output Impedance: 0.22Ω

Pin Configuration

The TL431BQDBZR 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

• Programmable Output Voltage: The TL431BQDBZR allows for precise adjustment of the output voltage by using external resistors.
• Low Dynamic Output Impedance: This feature ensures stability and accuracy 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: The TL431BQDBZR provides high precision and accuracy in voltage regulation.
• Low Temperature Drift: The device exhibits minimal changes in output voltage with temperature variations.
• Low Output Noise: The TL431BQDBZR generates low noise, making it suitable for noise-sensitive applications.

Advantages and Disadvantages

Advantages: - Precise voltage regulation - Wide operating current range - High accuracy - Low temperature drift - Low output noise

Disadvantages: - Requires external resistors for voltage adjustment - Limited to three-terminal configuration

Working Principles

The TL431BQDBZR operates as 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 Reference (R) pin, the output voltage can be precisely regulated.

Detailed Application Field Plans

The TL431BQDBZR is commonly used in various applications, including:

1. Voltage References: The device provides a stable and accurate voltage reference for analog circuits.
2. Switching Power Supplies: It is used to regulate the output voltage of switching power supplies.
3. Battery Chargers: The TL431BQDBZR ensures precise charging voltage control in battery charger circuits.
4. Audio Amplifiers: It can be employed to stabilize the bias voltage in audio amplifier circuits.
5. LED Drivers: The device helps maintain a constant current in LED driver circuits.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431BQDBZR include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1009: Precision Reference
3. REF3030: Low-Noise, Very Low Drift Precision Voltage Reference
4. MAX6001: Ultra-High-Precision, Ultra-Low-Noise Voltage Reference
5. ADR431: Precision Shunt Voltage Reference

These alternative models can be considered based on specific application requirements and desired performance characteristics.

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