TL431ACDBVRG4

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 - Low output noise - Wide operating current range - Low power consumption

Package: SOT-23 (Small Outline Transistor 23)

Essence: The TL431ACDBVRG4 is a three-terminal adjustable precision shunt regulator. It provides a highly accurate reference voltage that can be programmed to any desired value between the reference voltage (Vref) and 36 volts, with two external resistors.

Packaging/Quantity: The TL431ACDBVRG4 is available in tape and reel packaging, with 3000 units per reel.

Specifications

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

Pin Configuration

The TL431ACDBVRG4 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 adjustable reference voltage.

Functional Features

• Programmable Output Voltage: The TL431ACDBVRG4 allows the user to set the output voltage by connecting two external resistors.
• High Stability: It offers high stability over temperature and time, ensuring consistent performance.
• Low Output Noise: The IC produces low output noise, making it suitable for noise-sensitive applications.
• Wide Operating Current Range: It can operate within a wide current range, from 1 mA to 100 mA.
• Low Power Consumption: The TL431ACDBVRG4 consumes low power, making it energy-efficient.

Advantages and Disadvantages

Advantages: - Adjustable output voltage - High stability - Low output noise - Wide operating current range - Low power consumption

Disadvantages: - Requires external resistors for voltage programming - Limited temperature range (-40°C to +85°C)

Working Principles

The TL431ACDBVRG4 operates as a shunt regulator. It compares the reference voltage (Vref) with the voltage across the external resistor divider network. By adjusting the resistance values, the desired output voltage can be set. The TL431ACDBVRG4 then regulates the current flowing through the cathode terminal to maintain a stable output voltage.

Detailed Application Field Plans

The TL431ACDBVRG4 is widely used in various applications, including:

1. Voltage Regulation: It is commonly used as a precision voltage reference in power supplies, battery chargers, and voltage regulators.
2. Error Amplifier: It can be employed as an error amplifier in feedback control systems to regulate voltages or currents.
3. Overvoltage Protection: The TL431ACDBVRG4 can be utilized as an overvoltage protection device to prevent damage to sensitive components.
4. Battery Management: It finds application in battery management systems to monitor and control charging and discharging processes.

Detailed and Complete Alternative Models

Some alternative models to the TL431ACDBVRG4 include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. REF3030: Low-Noise, Very Low Drift, Precision Voltage Reference
3. LT1236: Precision Reference
4. MAX6126: Ultra-High-Precision, Low-Noise, Low-IQ Voltage Reference

These alternative models offer similar functionality and can be used as substitutes for the TL431ACDBVRG4 in various applications.

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