TL431BQDRG4

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Programmable Output Voltage - Low Dynamic Output Impedance - Wide Operating Current Range - Low Temperature Drift - High Accuracy - Fast Turn-On Response

Package: SOIC-8

Essence: The TL431BQDRG4 is a precision shunt regulator that provides a highly accurate reference voltage. It is commonly used in various electronic circuits to stabilize and regulate voltage levels.

Packaging/Quantity: The TL431BQDRG4 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 +125°C
• Initial Accuracy: ±0.5%
• Temperature Stability: ±50ppm/°C
• Dynamic Output Impedance: 0.22Ω

Pin Configuration

The TL431BQDRG4 has 8 pins arranged as follows:

```

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| | --| REF K |-- --| 1 2 |-- --| |-- --| ANODE C |-- --| 3 4 |-- --| |-- --| CATHODE |-- --| 5 6 |-- --| |-- --| NC GND |-- --| 7 8 |-- |__________| ```

Functional Features

• Adjustable Output Voltage: The TL431BQDRG4 allows the user to program the desired output voltage by connecting external resistors.
• Precision Voltage Reference: It provides a highly accurate reference voltage for precise voltage regulation in electronic circuits.
• Low Dynamic Output Impedance: The low output impedance ensures stable and reliable voltage regulation even with varying load conditions.
• Wide Operating Current Range: The TL431BQDRG4 can operate within a wide range of current levels, making it suitable for various applications.
• Low Temperature Drift: It exhibits minimal temperature drift, ensuring consistent performance across different operating temperatures.
• High Accuracy: The initial accuracy of ±0.5% ensures precise voltage regulation.
• Fast Turn-On Response: The TL431BQDRG4 has a quick response time, allowing for rapid voltage stabilization.

Advantages

• Versatile and widely used in various electronic applications.
• Provides precise and stable voltage regulation.
• Easy to use and program the desired output voltage.
• Wide operating current range allows for flexibility in design.
• Low temperature drift ensures consistent performance over a wide temperature range.
• High accuracy guarantees precise voltage regulation.
• Fast turn-on response enables rapid voltage stabilization.

Disadvantages

• Requires external resistors for programming the output voltage.
• Limited to a maximum output voltage of 36V.

Working Principles

The TL431BQDRG4 operates as a shunt regulator, maintaining a constant reference voltage between its REF and CATHODE pins. By connecting external resistors, the user can program the desired output voltage. The TL431BQDRG4 compares the reference voltage with the feedback voltage from the voltage divider network formed by the external resistors. Based on this comparison, it adjusts the current flowing through the device to maintain the programmed output voltage.

Detailed Application Field Plans

The TL431BQDRG4 finds extensive application in various fields, including:

1. Power Supply Regulation: It is commonly used in power supply circuits to stabilize and regulate the output voltage.
2. Battery Charging Systems: The TL431BQDRG4 ensures precise voltage regulation in battery charging circuits, preventing overcharging or undercharging.
3. Audio Amplifiers: It is utilized in audio amplifier circuits to provide stable biasing voltages for improved audio performance.
4. Voltage References: The TL431BQDRG4 serves as a reliable voltage reference in precision measurement equipment and instrumentation.
5. LED Lighting: It is employed in LED driver circuits to maintain a constant voltage across the LEDs, ensuring consistent brightness.

Detailed and Complete Alternative Models

1. TLV431AIDBZR
2. LM4040CIM3-2.5/NOPB
3. LT1009CZ#PBF
4. MAX6126AASA25+
5. REF3030AIDBZT

These alternative models offer similar functionality and can be used as substitutes for the TL431BQDRG4 in various applications.

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