TL431QDCKT

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: SOT-23-5

Essence: The TL431QDCKT is a precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.

Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Reference Voltage: 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

Pin Configuration

The TL431QDCKT has a SOT-23-5 package with the following pin configuration:

```

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| | --| 1 |-- Anode --| 2 |-- Cathode --| 3 |-- NC (No Connection) --| 4 |-- Reference --| 5 |-- NC (No Connection) |____| ```

Functional Features

• Programmable output voltage allows for flexibility in circuit design.
• Low dynamic output impedance ensures stability even with varying load conditions.
• Wide operating current range enables usage in a variety of applications.
• High accuracy and temperature stability ensure precise voltage regulation.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into circuits. - Provides a stable reference voltage. - Programmable output voltage offers versatility. - Wide operating current range suits different applications. - High accuracy and temperature stability ensure reliable performance.

Disadvantages: - Limited to low power applications. - Requires external components for proper operation. - Sensitivity to noise and fluctuations in input voltage.

Working Principles

The TL431QDCKT operates as a precision shunt regulator by comparing the reference voltage at its internal reference pin with an external voltage divider network. It adjusts the current flowing through its cathode and anode pins to maintain a stable output voltage. By programming the reference voltage using the external resistors, the TL431QDCKT can be used to regulate different output voltages.

Detailed Application Field Plans

The TL431QDCKT finds applications in various fields, including:

1. Power Supplies: Provides precise voltage regulation in power supply circuits.
2. Battery Charging Systems: Ensures accurate charging voltage for batteries.
3. Audio Amplifiers: Stabilizes the bias voltage in audio amplifier circuits.
4. Voltage Monitoring: Used as a voltage reference in monitoring circuits.
5. LED Lighting: Regulates the voltage for consistent brightness in LED lighting systems.

Alternative Models

Some alternative models that can be considered as replacements for the TL431QDCKT include:

1. LM4040: Precision Shunt Voltage Reference
2. LT1236: Micropower Precision Shunt Voltage Reference
3. MAX6126: Ultra-High-Precision Voltage Reference
4. REF3030: Low-Noise, Very Low Drift Precision Voltage Reference

These alternatives offer similar functionality and characteristics, providing options for different design requirements.

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