TL431IYDT

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Reference
• Characteristics:
  • Adjustable precision shunt regulator
  • Programmable output voltage
  • Low dynamic impedance
  • Wide operating current range
• Package: SOT-23-3
• Essence: TL431IYDT is a voltage reference IC that provides a stable and precise output voltage.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 3000 units per reel.

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%
• Output Voltage Tolerance: ±1%
• Cathode Current: 1mA to 100mA

Detailed Pin Configuration

The TL431IYDT IC has three pins: 1. Anode (A): Connected to the positive supply voltage. 2. Cathode (C): Connected to the load or ground. 3. Reference (R): Provides the stable output voltage.

Functional Features

• Adjustable Output Voltage: The TL431IYDT allows users to program the desired output voltage by connecting external resistors.
• Precision Shunt Regulation: It maintains a stable output voltage by regulating the current flow through the shunt resistor.
• Low Dynamic Impedance: The TL431IYDT exhibits low impedance, ensuring stability even under varying load conditions.
• Wide Operating Current Range: It can operate within a wide range of current, making it suitable for various applications.

Advantages and Disadvantages

Advantages

• High Precision: The TL431IYDT offers excellent voltage regulation accuracy.
• Easy to Use: Its simple pin configuration and adjustable output voltage make it user-friendly.
• Cost-Effective: It provides a cost-effective solution for voltage reference applications.

Disadvantages

• Limited Output Current: The TL431IYDT has a maximum output current of 100mA, which may not be sufficient for high-power applications.
• Temperature Sensitivity: Its performance can be affected by temperature variations, requiring additional measures for temperature compensation.

Working Principles

The TL431IYDT operates based on the principle of shunt regulation. It compares the reference voltage at the Reference (R) pin with the voltage across the shunt resistor connected to the Cathode (C) pin. By adjusting the current flowing through the shunt resistor, it regulates the output voltage to match the reference voltage.

Detailed Application Field Plans

The TL431IYDT finds applications in various fields, including: 1. Power Supplies: It is commonly used in power supply circuits to provide stable and accurate reference voltages. 2. Battery Charging Systems: It can be employed in battery charging circuits to regulate the charging voltage. 3. Voltage Monitoring: The TL431IYDT is utilized in voltage monitoring circuits to detect overvoltage or undervoltage conditions. 4. Audio Amplifiers: It can be integrated into audio amplifier circuits to maintain a constant bias voltage.

Detailed and Complete Alternative Models

Some alternative models to TL431IYDT include: - TLV431A: Similar functionality with improved accuracy and lower temperature coefficient. - LM4040: Precision voltage reference IC with fixed output voltage options. - REF3030: High-precision voltage reference IC with low dropout voltage.

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