TL431BIDMR2G

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

Package: SOT-23-3

Essence: The TL431BIDMR2G is a precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.

Packaging/Quantity: The TL431BIDMR2G is typically sold in reels of 3000 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

Pin Configuration

The TL431BIDMR2G 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 stable reference voltage.

Functional Features

• Programmable Output Voltage: The TL431BIDMR2G allows the user to set the desired output voltage by connecting external resistors.
• Low Dynamic Output Impedance: Ensures stability and accuracy of the reference voltage even with varying load conditions.
• Wide Operating Current Range: Can operate with currents ranging from 1mA to 100mA, making it suitable for a variety of applications.
• High Accuracy: The initial accuracy of ±0.5% ensures precise voltage regulation.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into circuits. - Provides a stable and accurate reference voltage. - Wide operating current range allows for flexibility in design. - Programmable output voltage provides customization options.

Disadvantages: - Limited to low power applications. - Requires external resistors for voltage programming.

Working Principles

The TL431BIDMR2G operates as a shunt regulator, maintaining a stable reference voltage between the cathode and reference pins. By adjusting the resistance connected to the reference pin, the output voltage can be programmed to the desired value. The internal circuitry of the TL431BIDMR2G ensures that the reference voltage remains constant even with varying load conditions.

Detailed Application Field Plans

The TL431BIDMR2G is commonly used in various electronic circuits where a stable reference voltage is required. Some typical application fields include:

1. Voltage Regulation: The TL431BIDMR2G can be used as a voltage reference in power supplies, battery chargers, and voltage regulators.
2. Precision Measurement: It is suitable for precision measurement equipment such as multimeters and oscilloscopes.
3. Audio Amplifiers: The TL431BIDMR2G can provide a stable bias voltage for audio amplifiers, ensuring accurate and distortion-free sound reproduction.
4. Switching Power Supplies: It can be used in feedback loops of switching power supplies to regulate the output voltage.

Detailed and Complete Alternative Models

Some alternative models to the TL431BIDMR2G that offer similar functionality are:

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

These alternative models provide comparable features and can be used as substitutes depending on specific requirements.

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