TL431QDBVTG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

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

Package: SOT-23 (Small Outline Transistor 23)

Essence: The TL431QDBVTG4 is a versatile voltage reference IC that provides a stable and accurate output voltage. It is commonly used in various electronic circuits where precise voltage references are required.

Packaging/Quantity: The TL431QDBVTG4 is available in a SOT-23 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Output Voltage Range: 2.5V to 36V
• Reference Voltage Tolerance: ±1%
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Input Voltage Range: 2.5V to 36V
• Quiescent Current: 1.0mA (typical)
• Dynamic Output Impedance: 0.22Ω (typical)
• Noise Voltage: 0.2µV/√Hz (typical)

Pin Configuration

The TL431QDBVTG4 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 TL431QDBVTG4 allows users to program the desired output voltage by connecting external resistors.
• Precision Voltage Reference: It provides a highly accurate and stable reference voltage, making it suitable for applications requiring precise voltage regulation.
• Low Dynamic Output Impedance: The low output impedance ensures good load regulation and stability.
• Wide Operating Current Range: The IC can operate within a wide range of current levels, making it versatile for various applications.
• Low Power Consumption: The TL431QDBVTG4 consumes very low power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High precision and stability - Wide operating temperature range - Low output noise - Adjustable output voltage - Small package size

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

Working Principles

The TL431QDBVTG4 is based on the principle of a shunt regulator. It compares the reference voltage at the Reference (R) pin with an internal voltage divider network. By adjusting the voltage at the Reference pin using external resistors, the desired output voltage can be set. The TL431QDBVTG4 then regulates the voltage across the load by controlling the current flow through the Cathode (K) pin.

Detailed Application Field Plans

The TL431QDBVTG4 finds applications in various fields, including:

1. Power Supplies: It is commonly used as a voltage reference in power supply circuits to provide stable and accurate output voltages.
2. Battery Charging Systems: The TL431QDBVTG4 is used in battery charging circuits to regulate the charging voltage and ensure proper charging of batteries.
3. Audio Amplifiers: It can be employed in audio amplifier circuits to provide a stable bias voltage for optimal amplifier performance.
4. Voltage Regulators: The TL431QDBVTG4 is utilized in voltage regulator circuits to maintain a constant output voltage regardless of load variations.
5. Temperature Sensors: It can be used as a temperature sensor in electronic circuits by utilizing its voltage reference capabilities.

Detailed and Complete Alternative Models

1. TL431ACDBZR: SOT-23 package, adjustable precision shunt regulator.
2. TLV431BQDBVR: SOT-23 package, low-voltage adjustable precision shunt regulator.
3. LM4040AIM3-2.5/NOPB: SOT-23 package, precision micropower shunt voltage reference.

These alternative models offer similar functionality and characteristics to the TL431QDBVTG4 and can be considered as substitutes based on specific application requirements.

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