TL431AQDBVRQ1

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 - High Accuracy - Low Temperature Drift - Low Output Noise - Small Package Size

Package: SOT-23 (3-Lead), Tape and Reel

Essence: The TL431AQDBVRQ1 is an adjustable 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 TL431AQDBVRQ1 is available in a SOT-23 package, which contains 3 leads. It is typically supplied in tape and reel packaging.

Specifications

• Reference Voltage Range: 2.495 V to 36 V
• Operating Current Range: 100 µA to 100 mA
• Temperature Range: -40°C to +125°C
• Initial Accuracy: ±0.5%
• Temperature Stability: ±50 ppm/°C
• Dynamic Output Impedance: 0.22 Ω

Pin Configuration

The TL431AQDBVRQ1 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 regulated output voltage.

Functional Features

• Adjustable Output Voltage: The TL431AQDBVRQ1 allows for precise adjustment of the output voltage by using external resistors.
• Voltage Reference: It provides a stable and accurate reference voltage for other components in the circuit.
• Shunt Regulation: The TL431AQDBVRQ1 regulates the voltage by shunting excess current to the ground.
• Low Output Impedance: It maintains a low dynamic output impedance, ensuring stability and accuracy in voltage regulation.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Wide operating current range - Low temperature drift - Small package size - Programmable output voltage

Disadvantages: - Requires external resistors for precise voltage adjustment - Limited maximum output current capability

Working Principles

The TL431AQDBVRQ1 operates as a precision 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 output voltage can be precisely set. The TL431AQDBVRQ1 then regulates the voltage by shunting excess current through the Cathode (K) pin to maintain a stable output voltage.

Detailed Application Field Plans

The TL431AQDBVRQ1 is widely used in various applications, including:

1. Voltage Regulation: It is commonly used in power supplies, battery chargers, and voltage regulators to provide stable and accurate output voltages.
2. Precision Instrumentation: The TL431AQDBVRQ1 is utilized in precision measurement equipment, such as multimeters and oscilloscopes, to ensure accurate voltage references.
3. Audio Amplifiers: It is employed in audio amplifiers to regulate bias voltages and improve overall performance.
4. Switching Power Supplies: The TL431AQDBVRQ1 is used in switching power supply circuits to provide feedback control and maintain stable output voltages.

Detailed and Complete Alternative Models

Some alternative models that can be used as substitutes for the TL431AQDBVRQ1 include:

1. TL431BQDBZR: Similar characteristics and package, but with a different temperature range (-40°C to +85°C).
2. TLV431BQDBZR: Comparable performance and package, but with a lower reference voltage range (1.24 V to 6 V).
3. LM4040AIM3-2.5/NOPB: Precision shunt voltage reference with a fixed output voltage of 2.5 V.

These alternative models offer similar functionality and can be chosen based on specific application requirements.

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