TL431AIDBVRG4

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23 (Small Outline Transistor)
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

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

Pin Configuration

The TL431AIDBVRG4 has three pins:

1. Anode (A): Connected to the positive terminal of the power supply.
2. Cathode (K): Connected to the load or reference voltage output.
3. Reference (R): Connected to an external resistor divider network to set the desired reference voltage.

Functional Features

• Adjustable output voltage reference.
• High accuracy and stability over temperature and time.
• Low dynamic impedance.
• Wide operating voltage range.
• Low quiescent current.
• Fast response time.

Advantages and Disadvantages

Advantages

• Provides a stable and precise reference voltage for various applications.
• Easy to use and configure.
• Can be used as a voltage regulator or voltage reference in electronic circuits.
• Offers excellent line and load regulation.
• Suitable for both low and high voltage applications.

Disadvantages

• Requires an external resistor divider network to set the reference voltage.
• Limited output current capability (100mA).
• Not suitable for applications requiring high output current.

Working Principles

The TL431AIDBVRG4 is a three-terminal adjustable precision shunt regulator. It operates by comparing the reference voltage at the Reference (R) pin with an internal voltage reference. By adjusting the external resistor divider network connected to the Reference (R) pin, the desired output voltage can be set. The TL431AIDBVRG4 then regulates the voltage across the Cathode (K) and Anode (A) pins to maintain a stable output voltage.

Detailed Application Field Plans

The TL431AIDBVRG4 finds applications in various fields, including:

1. Power supply circuits: Provides a stable reference voltage for voltage regulators.
2. Battery charging circuits: Ensures precise voltage regulation during charging.
3. Audio amplifiers: Used as a voltage reference for biasing and signal conditioning.
4. Switching power supplies: Maintains accurate voltage levels for control circuits.
5. Industrial automation: Provides a stable reference voltage for sensors and control systems.

Detailed and Complete Alternative Models

Some alternative models to the TL431AIDBVRG4 include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1236: Precision Reference
3. REF3030: Low-Noise, Very Low Drift Precision Voltage Reference
4. MAX6126: Ultra-High-Precision, Ultra-Low-Noise Voltage Reference
5. ADR421: Precision Micropower Low Dropout Voltage Reference

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

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