TL431CDE4

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOIC-8
• Essence: The TL431CDE4 is a three-terminal adjustable precision shunt regulator. It provides a highly accurate reference voltage, making it suitable for various applications requiring precise voltage regulation.
• Packaging/Quantity: The TL431CDE4 is available in a standard SOIC-8 package and is typically sold in reels of 2500 units.

Specifications

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

Pin Configuration

The TL431CDE4 has the following pin configuration:

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| | --|REF |-- Anode --|K |-- Cathode --|A |-- Control Terminal |____| ```

Functional Features

• Adjustable Output Voltage: The TL431CDE4 allows the user to set the desired output voltage by connecting a resistor divider network to the control terminal.
• High Accuracy: With a typical output voltage tolerance of ±1%, the TL431CDE4 provides precise voltage regulation.
• Low Power Consumption: The device operates with low quiescent current, making it suitable for battery-powered applications.
• Wide Temperature Range: The TL431CDE4 can operate in a wide temperature range from -40°C to +85°C, making it suitable for various environmental conditions.

Advantages and Disadvantages

Advantages: - High accuracy and precision - Adjustable output voltage - Low power consumption - Wide temperature range

Disadvantages: - Requires external resistor divider network for voltage adjustment - Limited maximum cathode current capability (1mA to 100mA)

Working Principles

The TL431CDE4 operates as a shunt regulator by comparing the reference voltage at the control terminal with an external voltage divider network. It adjusts the cathode current to maintain a stable output voltage. By changing the resistance values in the voltage divider, the desired output voltage can be set.

Detailed Application Field Plans

The TL431CDE4 is commonly used in various applications, including:

1. Voltage Regulation: The device is widely used in power supplies, battery chargers, and voltage regulators to provide precise and stable output voltages.
2. Overvoltage Protection: It can be employed as a protective element to prevent excessive voltage levels in electronic circuits.
3. Current Limiting: The TL431CDE4 can be utilized as a current limiter to protect sensitive components from excessive current flow.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431CDE4 include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1236: Precision Reference
3. MAX6126: Ultra-High-Precision Voltage Reference
4. REF3030: Precision Voltage Reference

These alternatives provide comparable features and can be considered based on specific application requirements.

In conclusion, the TL431CDE4 is a versatile voltage reference integrated circuit that offers adjustable precision shunt regulation. With its high accuracy, low power consumption, and wide temperature range, it finds applications in voltage regulation, overvoltage protection, and current limiting. Alternative models such as LM4040, LT1236, MAX6126, and REF3030 can also be considered for similar applications.