TL431AIDG

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOIC-8
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape & Reel, 2500 pieces per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Output Current: 1mA to 100mA
• Operating Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Temperature Stability: 50ppm/°C (typical)

Detailed Pin Configuration

The TL431AIDG is an 8-pin integrated circuit with the following pin configuration:

1. Anode (A): Connected to the reference voltage input.
2. Cathode (K): Connected to the ground or negative supply.
3. Reference (REF): Provides the regulated output voltage.
4. Control (CTL): Used to adjust the reference voltage.
5. Discharge (DIS): Allows for quick discharge of the external capacitor.
6. Sense (SENSE): Connects to the load to sense the regulated voltage.
7. NC: No connection.
8. NC: No connection.

Functional Features

• Programmable output voltage reference.
• High precision and stability.
• Low dynamic impedance.
• Wide operating voltage range.
• Low temperature coefficient.
• Fast response time.
• Low power consumption.

Advantages and Disadvantages

Advantages

• Highly accurate voltage reference.
• Easy to use and configure.
• Wide range of applications.
• Low cost.
• Compact package size.

Disadvantages

• Limited output current capability.
• Requires external components for proper operation.
• Sensitivity to temperature variations.

Working Principles

The TL431AIDG is a precision shunt regulator that provides a stable reference voltage. It operates by comparing the reference voltage at the REF pin with an internal voltage divider network. The control voltage at the CTL pin determines the output voltage, which is regulated by adjusting the current flowing through the shunt resistor. By changing the resistance connected to the CTL pin, the output voltage can be adjusted within the specified range.

Detailed Application Field Plans

The TL431AIDG is widely used in various applications, including:

1. Voltage regulation in power supplies and battery chargers.
2. Current limiting circuits.
3. Voltage monitoring and protection circuits.
4. Precision analog circuits.
5. Temperature sensors and controllers.
6. Switch-mode power supplies.
7. LED drivers.
8. Audio amplifiers.

Detailed and Complete Alternative Models

Some alternative models to TL431AIDG include:

1. LM4040: Precision Micropower Shunt Voltage Reference.
2. LT1009: Precision Reference.
3. MAX6126: Ultra-High-Precision Voltage Reference.
4. REF02: Precision Voltage Reference.
5. ADR4550: Precision 5V Series Voltage Reference.

These alternative models offer similar functionality and performance characteristics, providing options for different design requirements.

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