TL431AIL3T

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: TO-92, SOT-23

Essence: The TL431AIL3T is a versatile voltage reference IC that provides a stable and precise output voltage. It is commonly used in various electronic circuits where accurate voltage regulation is required.

Packaging/Quantity: The TL431AIL3T is available in TO-92 and SOT-23 packages. It is typically sold in reels or tubes containing multiple 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: ±0.5%
• Dynamic Output Impedance: 0.22Ω (typical)
• Quiescent Current: 1.0mA (typical)

Pin Configuration

The TL431AIL3T 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 regulated output voltage.

Functional Features

• Adjustable Output Voltage: The TL431AIL3T allows the user to set the desired output voltage by connecting external resistors.
• Precision Regulation: It provides a highly accurate and stable output voltage, making it suitable for applications requiring precise voltage references.
• Low Dynamic Impedance: The low dynamic output impedance ensures good load regulation and stability.
• Wide Operating Current Range: The IC can operate within a wide range of current levels, making it versatile for various applications.
• Low Output Noise: The TL431AIL3T generates minimal output noise, ensuring clean and reliable voltage regulation.
• Fast Response Time: It responds quickly to changes in load conditions, maintaining a stable output voltage.

Advantages and Disadvantages

Advantages: - High precision and stability - Adjustable output voltage - Wide operating current range - Low output noise - Fast response time

Disadvantages: - Requires external resistors for voltage adjustment - Limited maximum output current capability

Working Principles

The TL431AIL3T operates as a shunt regulator. It compares the reference voltage at the Reference (R) pin with a fraction of the output voltage. By adjusting the resistance connected to the Reference pin, the output voltage can be precisely regulated. The TL431AIL3T continuously monitors the output voltage and adjusts its internal impedance to maintain a stable output.

Detailed Application Field Plans

The TL431AIL3T finds applications in various fields, including:

1. Power Supplies: It is commonly used in power supply circuits to provide accurate voltage references for voltage regulators, feedback loops, and control circuits.
2. Battery Charging: The TL431AIL3T is utilized in battery charging circuits to regulate the charging voltage and ensure safe and efficient charging.
3. Audio Amplifiers: It can be employed in audio amplifier circuits to provide stable bias voltages and improve overall performance.
4. Voltage Monitors: The TL431AIL3T is used in voltage monitoring circuits to detect overvoltage or undervoltage conditions and trigger appropriate actions.
5. LED Drivers: It is utilized in LED driver circuits to regulate the forward voltage and maintain consistent brightness.

Detailed and Complete Alternative Models

Some alternative models to the TL431AIL3T include:

1. TL431BQDBZR
2. TLVH431AQDBZR
3. LM4040CIM3-5.0/NOPB
4. LT1009CZ#PBF
5. MAX6126AASA25+

These models offer similar functionality and can be used as alternatives depending on specific requirements.

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