TL431IDMR2G

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

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

Package: SOIC-8

Essence: The TL431IDMR2G is a 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 TL431IDMR2G 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
• Quiescent Current: 1.0mA

Pin Configuration

The TL431IDMR2G has eight pins arranged as follows:

```

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| | --|1 8|-- --|2 7|-- --|3 6|-- --|4 5|-- |____| ```

1. Anode
2. Cathode
3. Reference Voltage
4. N/C (No Connection)
5. N/C (No Connection)
6. N/C (No Connection)
7. N/C (No Connection)
8. N/C (No Connection)

Functional Features

• Voltage Regulation: The TL431IDMR2G acts as a precision shunt regulator, maintaining a stable output voltage regardless of input variations.
• Programmable Output: The output voltage can be adjusted by connecting external resistors to the reference pin.
• Temperature Stability: It exhibits high stability over a wide temperature range, making it suitable for applications with varying environmental conditions.
• Low Dynamic Impedance: The low dynamic output impedance ensures excellent load regulation and transient response.

Advantages and Disadvantages

Advantages: - Precise voltage regulation - Adjustable output voltage - Wide operating current range - High stability over temperature and time - Low output noise - Fast response time

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

Working Principles

The TL431IDMR2G operates based on the principle of a shunt regulator. It compares the reference voltage at the reference pin with an internal voltage divider network. By adjusting the resistance connected to the reference pin, the output voltage can be programmed to the desired value. The TL431IDMR2G continuously monitors the output voltage and adjusts the current flowing through the cathode to maintain a stable output.

Detailed Application Field Plans

The TL431IDMR2G 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 accurate voltage references for feedback control circuits.
2. Battery Charging Systems: The TL431IDMR2G ensures precise voltage regulation during battery charging, preventing overcharging or undercharging.
3. Audio Amplifiers: It is employed in audio amplifiers to maintain a stable bias voltage for improved audio quality.
4. Voltage Monitors: The TL431IDMR2G is utilized as a voltage monitor in battery management systems, ensuring safe operation and protection against overvoltage conditions.

Detailed and Complete Alternative Models

1. LM4040: Precision Micropower Shunt Voltage Reference
2. REF3030: Low-Noise, Low-Drift, Precision Voltage Reference
3. LT1236: Precision Reference with Ultralow Drift and Noise

These alternative models offer similar functionality and performance to the TL431IDMR2G and can be used as substitutes in various applications.

In conclusion, the TL431IDMR2G is a versatile voltage reference IC that provides precise and adjustable output voltage regulation. Its wide operating current range, stability, and low output noise make it suitable for a variety of electronic systems. However, it requires external components for voltage adjustment and has limited output current capability.