TL431AW5-7

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

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

Package: SOT-23-5

Essence: The TL431AW5-7 is a voltage reference IC that provides a stable and adjustable output voltage. It is commonly used in various electronic circuits where precise voltage references are required.

Packaging/Quantity: The TL431AW5-7 is available in a SOT-23-5 package, which consists of a small plastic body with five leads. It is typically sold in reels or tubes containing multiple units.

Specifications

• Output Voltage Range: 2.495V to 36V
• Reference Voltage Tolerance: ±1%
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Power Dissipation: 625mW

Pin Configuration

The TL431AW5-7 has five pins arranged as follows:

```

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| | --| 1 |-- Anode --| 2 |-- Cathode --| 3 |-- Reference Voltage --| 4 |-- N/C (No Connection) --| 5 |-- N/C (No Connection) |____| ```

Functional Features

• Voltage Regulation: The TL431AW5-7 acts as a precision shunt regulator, maintaining a stable output voltage regardless of input variations.
• Adjustable Output: The output voltage can be programmed by connecting external resistors to the reference pin.
• Temperature Stability: It exhibits high stability over a wide temperature range, ensuring consistent performance in various operating conditions.
• Low Dynamic Impedance: The TL431AW5-7 has a low dynamic output impedance, allowing it to provide a stable voltage reference even with varying load conditions.

Advantages and Disadvantages

Advantages: - Precise and adjustable voltage reference - Wide operating current range - High stability over temperature and time - Low power consumption - Small package size

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

Working Principles

The TL431AW5-7 operates based on the principle of a shunt regulator. It compares the reference voltage at the reference pin with an internal voltage divider network. By adjusting the resistance connected to the reference pin, the output voltage can be set to the desired value. The TL431AW5-7 continuously monitors the output voltage and adjusts its internal impedance to maintain a stable output.

Detailed Application Field Plans

The TL431AW5-7 finds applications in various electronic systems where precise voltage references are essential. Some common application areas include:

1. Power Supplies: It is used in voltage regulators and power management circuits to provide accurate voltage references for stable power supply operation.
2. Battery Charging: The TL431AW5-7 ensures precise voltage control during battery charging processes, preventing overcharging or undercharging.
3. Audio Systems: It is employed in audio amplifiers and signal processing circuits to maintain accurate biasing and voltage levels.
4. Industrial Control Systems: The TL431AW5-7 is utilized in control systems to provide stable voltage references for analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
5. Automotive Electronics: It is used in automotive applications such as engine control units (ECUs), lighting systems, and sensor interfaces to ensure reliable voltage references.

Detailed and Complete Alternative Models

1. TL431BQDBZR: SOT-23-3 package, adjustable precision shunt regulator.
2. TLV431BQDBZR: SOT-23-3 package, low-voltage adjustable precision shunt regulator.
3. LM4040AIM3-2.5/NOPB: SOT-23-3 package, precision micropower shunt voltage reference.

These alternative models offer similar functionality and can be used as substitutes for the TL431AW5-7 in various applications.

In conclusion, the TL431AW5-7 is a versatile voltage reference IC that provides precise and adjustable output voltages. Its wide operating current range, stability, and small package size make it suitable for a variety of electronic systems.