TL431BQPKG3

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: BQPKG3 (SOT-23-3)

Essence: The TL431BQPKG3 is a precision shunt regulator that provides a stable reference voltage. It is commonly used in various electronic circuits to regulate voltage levels.

Packaging/Quantity: The TL431BQPKG3 is available in a SOT-23-3 package, which consists of three pins. It is typically sold in reels or tubes containing multiple units.

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%
• Dynamic Output Impedance: 0.22Ω (typical)
• Cathode Current: 1mA to 100mA

Pin Configuration

The TL431BQPKG3 has three pins arranged as follows:

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| | --| 1 |-- Anode --| | --| 2 |-- Cathode --| | --| 3 |-- Reference |____| ```

Functional Features

• Voltage Reference: The TL431BQPKG3 provides a stable reference voltage that can be adjusted using external resistors.
• Programmable Output Voltage: By connecting appropriate resistors, the output voltage can be set to the desired value.
• Low Dynamic Output Impedance: The device exhibits low dynamic output impedance, ensuring stable voltage regulation.
• Wide Operating Current Range: The TL431BQPKG3 can operate within a wide current range, making it suitable for various applications.
• High Accuracy and Temperature Stability: It offers high accuracy and temperature stability, ensuring reliable performance across different operating conditions.

Advantages and Disadvantages

Advantages: - Precise voltage regulation - Adjustable output voltage - Wide operating current range - High accuracy and temperature stability

Disadvantages: - Requires external resistors for voltage adjustment - Limited maximum reference voltage (36V)

Working Principles

The TL431BQPKG3 operates as a shunt regulator by comparing the reference voltage with an adjustable voltage divider. When the input voltage exceeds the reference voltage, the device starts conducting current through the cathode pin, effectively regulating the output voltage. By adjusting the resistors connected to the reference pin, the desired output voltage can be achieved.

Detailed Application Field Plans

The TL431BQPKG3 finds applications in various electronic systems, including but not limited to: 1. Voltage regulators 2. Switching power supplies 3. Battery chargers 4. Audio amplifiers 5. LED drivers 6. Industrial control systems

Detailed and Complete Alternative Models

Some alternative models that can be used as substitutes for the TL431BQPKG3 include: - TL431AQDBZR - TL431ACDR - TL431BCPWR - TL431BIDBZT

These alternatives offer similar functionality and characteristics, allowing flexibility in design choices.

In conclusion, the TL431BQPKG3 is a versatile voltage reference IC that provides precise and adjustable voltage regulation. With its wide operating current range, high accuracy, and temperature stability, it finds applications in various electronic systems. While it requires external resistors for voltage adjustment and has a limited maximum reference voltage, it offers reliable performance in diverse applications.