TL431CDBVRE4

Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable, Precision, Shunt Regulator
• Package: SOT-23 (Small Outline Transistor)
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Output Current: 1mA to 100mA
• Temperature Coefficient: ±50ppm/°C
• Operating Temperature Range: -40°C to +125°C
• Line Regulation: 0.2% typical
• Load Regulation: 0.4% typical
• Dropout Voltage: 1.5V typical at 10mA load current

Pin Configuration

The TL431CDBVRE4 has a total of three pins:

1. Anode (A): Connected to the reference voltage input.
2. Cathode (K): Connected to the ground or negative supply voltage.
3. Reference (R): Provides the regulated output voltage.

Functional Features

• Programmable Output Voltage: The TL431CDBVRE4 allows for adjustable output voltages within the specified range.
• Precision Reference: It provides a highly accurate reference voltage with low temperature coefficient and good line/load regulation.
• Shunt Regulator: The device operates as a shunt regulator, maintaining a constant voltage across the load.
• Low Dropout Voltage: The dropout voltage is relatively low, ensuring efficient operation even with low input-output differentials.

Advantages and Disadvantages

Advantages: - Wide operating voltage range - High accuracy and precision - Low temperature coefficient - Good line and load regulation - Small package size

Disadvantages: - Limited output current capability - Requires external components for proper operation

Working Principles

The TL431CDBVRE4 is a three-terminal adjustable shunt regulator. It compares the reference voltage at the Reference (R) pin with the voltage at the Anode (A) pin. Based on this comparison, it adjusts the current flowing through the Cathode (K) pin to maintain a constant voltage across the load.

Detailed Application Field Plans

The TL431CDBVRE4 finds applications in various fields, including:

1. Power Supplies: It is commonly used as a voltage reference in linear power supplies to provide stable and accurate output voltages.
2. Battery Charging Systems: The device can be employed in battery charging circuits to regulate the charging voltage and protect the battery from overcharging.
3. Audio Amplifiers: It is utilized in audio amplifiers to set bias voltages and ensure consistent performance.
4. Voltage Monitors: The TL431CDBVRE4 can be used as a voltage monitor to detect overvoltage or undervoltage conditions and trigger appropriate actions.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431CDBVRE4 include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1009: Precision Reference
3. REF3030: Low Dropout Voltage Reference
4. MAX6126: Ultra-High-Precision Voltage Reference

These alternatives can be considered based on specific requirements and application needs.

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