TLV431BQPK

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Low Output Voltage Deviation Over Temperature Range - High Accuracy and Stability - Low Dynamic Output Impedance - Wide Operating Current Range - Low Power Consumption

Package: SOT-23 (3-Pin)

Essence: The TLV431BQPK is a precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.

Packaging/Quantity: The TLV431BQPK is typically available in reels of 3000 units.

Specifications

• Reference Voltage: Adjustable from 1.24V to 6V
• Operating Current Range: 1μA to 100mA
• Initial Accuracy: ±1%
• Temperature Coefficient: 50ppm/°C
• Dynamic Output Impedance: 0.25Ω
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TLV431BQPK 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 reference voltage.

Functional Features

• Adjustable Reference Voltage: The TLV431BQPK allows the user to adjust the reference voltage according to their specific requirements.
• High Accuracy and Stability: The initial accuracy of ±1% ensures precise voltage regulation, while the low temperature coefficient of 50ppm/°C maintains stability over a wide temperature range.
• Low Dynamic Output Impedance: The low output impedance of 0.25Ω ensures excellent load regulation and reduces voltage deviations caused by varying loads.
• Wide Operating Current Range: The TLV431BQPK can operate with a wide range of currents, from 1μA to 100mA, making it suitable for various applications.
• Low Power Consumption: With its low quiescent current of typically 60μA, the TLV431BQPK minimizes power consumption in battery-powered devices.

Advantages and Disadvantages

Advantages: - Adjustable reference voltage allows flexibility in circuit design. - High accuracy and stability ensure precise voltage regulation. - Low dynamic output impedance provides excellent load regulation. - Wide operating current range accommodates different application requirements. - Low power consumption prolongs battery life.

Disadvantages: - Limited maximum output current compared to other voltage regulators. - SOT-23 package may not be suitable for all applications requiring higher power dissipation.

Working Principles

The TLV431BQPK operates as a shunt regulator, maintaining a stable reference voltage between the cathode (K) and reference (R) pins. By adjusting the resistor divider network connected to the reference pin, the desired output voltage can be set. The TLV431BQPK compares the reference voltage with the voltage at the cathode pin and adjusts the current flowing through the device to maintain a constant voltage drop across it.

Detailed Application Field Plans

The TLV431BQPK finds applications in various fields, including:

1. Voltage Regulation: It is commonly used as a precision voltage reference in power supplies, battery chargers, and voltage regulators.
2. Feedback Control Systems: It can be employed in feedback control loops to provide accurate voltage references for operational amplifiers, analog-to-digital converters, and other sensitive circuits.
3. Battery Management: The TLV431BQPK helps monitor and regulate battery voltage in portable devices, ensuring optimal charging and discharging processes.
4. Temperature Compensation: It can be utilized in temperature compensation circuits to maintain stable voltage references over a wide temperature range.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TLV431BQPK include:

1. LM4040: Precision Shunt Voltage Reference
2. REF3030: Adjustable Precision Voltage Reference
3. MAX6001: Low-Power, Precision Voltage Reference
4. LT1236: Micropower Precision Shunt Voltage Reference

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

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