TL431AIDBZRG4

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: SOT-23-3

Essence: The TL431AIDBZRG4 is a versatile voltage reference IC that provides precise and stable output voltage regulation. It is commonly used in various electronic circuits where accurate voltage references are required.

Packaging/Quantity: The TL431AIDBZRG4 is available in a SOT-23-3 package, which is a small surface-mount package with three pins. 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
• Quiescent Current: 1.0mA

Pin Configuration

The TL431AIDBZRG4 has three pins arranged as follows:

```

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| | --| 1 |-- Anode --| | --| 2 |-- Cathode --|____| | 3 |-- Reference |____| ```

Functional Features

• Voltage Reference: The TL431AIDBZRG4 provides a highly accurate and stable voltage reference that can be programmed by external resistors.
• Shunt Regulation: It acts as a shunt regulator, maintaining a constant voltage drop across the reference pin.
• Adjustable Output: The output voltage can be adjusted by connecting external resistors to set the desired reference voltage.
• Temperature Stability: It exhibits high stability over a wide temperature range, making it suitable for applications with varying environmental conditions.
• Low Output Noise: The TL431AIDBZRG4 has low output noise, ensuring clean and reliable voltage regulation.

Advantages

• Precise and stable voltage reference
• Wide operating current range
• Adjustable output voltage
• Low dynamic impedance
• High temperature stability
• Low output noise
• Fast response time

Disadvantages

• Limited maximum output current capability
• Requires external resistors for voltage adjustment

Working Principles

The TL431AIDBZRG4 operates based on the principle of shunt regulation. It compares the voltage at its reference pin (pin 3) with an internal reference voltage and adjusts the current flowing through the cathode (pin 2) to maintain a constant voltage drop across the reference pin. By connecting external resistors, the output voltage can be programmed to the desired value.

Application Field Plans

The TL431AIDBZRG4 finds extensive use in various electronic circuits that require accurate voltage references. Some common application areas include:

1. Power Supplies: It is used in voltage regulators and power management circuits to provide precise voltage references for stable operation.
2. Battery Charging Systems: The TL431AIDBZRG4 ensures accurate voltage regulation in battery charging circuits, preventing overcharging or undercharging.
3. Audio Amplifiers: It is employed in audio amplifiers to maintain a stable bias voltage, improving overall performance and reducing distortion.
4. Industrial Control Systems: The IC is utilized in industrial control systems to provide accurate voltage references for sensor interfaces and control circuitry.
5. Automotive Electronics: It finds application in automotive electronics for voltage regulation in various subsystems, such as lighting systems and engine control units.

Alternative Models

1. LM431: A similar voltage reference IC with adjustable output and comparable specifications.
2. TLV431: Another voltage reference IC offering adjustable output voltage and high accuracy.
3. REF3030: A precision voltage reference IC with low temperature drift and excellent long-term stability.

These alternative models can be considered based on specific application requirements and availability.

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