TL431AIDR2G

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Programmable output voltage - Low dynamic impedance - High stability over temperature - Wide operating current range - Low output noise

Package: SOIC-8

Essence: The TL431AIDR2G is a versatile voltage reference IC that provides a stable and adjustable output voltage. It is commonly used in various electronic circuits where precise voltage regulation is required.

Packaging/Quantity: The TL431AIDR2G is available in a standard SOIC-8 package. It is typically sold in reels containing 2500 units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Output Voltage Tolerance: ±1%
• Dynamic Output Impedance: 0.22Ω (typical)
• Quiescent Current: 1.0mA (typical)

Pin Configuration

The TL431AIDR2G has eight pins arranged as follows:

____ NC | | Vref NC | | Anode NC | | Cathode NC |____| NC

Functional Features

• Voltage Reference: The TL431AIDR2G provides a stable reference voltage that can be adjusted using external resistors.
• Shunt Regulation: It acts as a shunt regulator, maintaining a constant voltage across the load.
• Programmable Output Voltage: The output voltage can be set by connecting external resistors to the reference pin.
• Temperature Stability: The TL431AIDR2G exhibits high stability over a wide temperature range, making it suitable for various operating conditions.
• Low Output Noise: It generates minimal output noise, ensuring clean and reliable voltage regulation.

Advantages and Disadvantages

Advantages: - Precise and adjustable voltage reference - Wide operating current range - High stability over temperature - Low output noise - Easy to use and integrate into circuits

Disadvantages: - Requires external resistors for voltage adjustment - Limited output current capability (up to 100mA)

Working Principles

The TL431AIDR2G operates based on the principle of shunt regulation. It compares the reference voltage at the Vref pin with the voltage across the load connected between the Anode and Cathode pins. By adjusting the current flowing through the internal resistor network, it maintains a constant voltage across the load.

Detailed Application Field Plans

The TL431AIDR2G finds applications in various electronic systems that require precise voltage regulation. Some common application areas include:

1. Power Supplies: It is used in linear power supplies to provide stable reference voltages for feedback control loops.
2. Battery Charging Systems: The TL431AIDR2G ensures accurate voltage regulation during battery charging, preventing overcharging or undercharging.
3. Audio Amplifiers: It can be employed in audio amplifiers to maintain a constant bias voltage for improved performance.
4. Voltage Monitors: The TL431AIDR2G is utilized in voltage monitoring circuits to trigger alarms or shutdown systems when the voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

1. LM431: A functionally equivalent alternative from Texas Instruments.
2. KA431: A similar shunt regulator IC offered by Fairchild Semiconductor.
3. TLVH431: Another voltage reference IC with adjustable output voltage from Texas Instruments.

These alternative models provide similar functionality and can be used as substitutes for the TL431AIDR2G in various applications.

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