TL431BILPE3

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Programmable output voltage - Low dynamic impedance - High stability over temperature range - Low output noise - Wide operating current range

Package: SOT-23-3

Essence: The TL431BILPE3 is a voltage reference IC that provides a stable and precise output voltage. It is commonly used in various electronic circuits where a stable voltage reference is required.

Packaging/Quantity: The TL431BILPE3 is available in a SOT-23-3 package, which is a small surface-mount package. 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: ±1%
• Dynamic Output Impedance: 0.22Ω
• Quiescent Current: 1.0mA

Pin Configuration

The TL431BILPE3 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 stable output voltage.

Functional Features

• Adjustable Output Voltage: The TL431BILPE3 allows the user to program the desired output voltage by connecting external resistors.
• Precision Voltage Reference: 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 regulation and stability even with varying load conditions.
• Wide Operating Current Range: The IC can operate within a wide range of current, making it versatile for various applications.
• Low Output Noise: The TL431BILPE3 generates minimal output noise, ensuring clean and reliable voltage reference.

Advantages

• Easy to use and integrate into circuits
• Provides stable and precise voltage reference
• Wide operating temperature range
• Low output noise
• Compact surface-mount package

Disadvantages

• Limited output current capability
• Requires external resistors for voltage programming

Working Principles

The TL431BILPE3 operates as a shunt regulator. It compares the reference voltage at the Reference (R) pin with the voltage across the external resistor network connected between the Anode (A) and Cathode (K) pins. By adjusting the resistance values, the desired output voltage can be set. The internal circuitry of the IC then regulates the current flowing through the Cathode (K) pin to maintain a stable output voltage.

Detailed Application Field Plans

The TL431BILPE3 finds applications in various fields, including:

1. Power Supplies: It is used as a voltage reference in linear and switching power supplies to ensure stable and accurate output voltages.
2. Battery Charging Systems: The IC is employed in battery charging circuits to provide a precise voltage reference for controlling the charging process.
3. Audio Amplifiers: It can be utilized in audio amplifiers to establish a stable bias voltage for improved performance and reduced distortion.
4. Voltage Regulators: The TL431BILPE3 is commonly used in voltage regulator circuits to maintain a constant output voltage regardless of load variations.

Detailed and Complete Alternative Models

Some alternative models to the TL431BILPE3 include:

1. LM4040: Precision Shunt Voltage Reference
2. LT1236: Micropower Precision Shunt Voltage Reference
3. REF02: Precision Voltage Reference
4. MAX6126: Ultra-High-Precision Voltage Reference

These alternative models offer similar functionality and can be used as substitutes based on specific requirements.

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