TL1431IDT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Reference
• Characteristics: Precision, Adjustable, Shunt Regulator
• Package: SOIC-8
• Essence: TL1431IDT is a precision shunt regulator that provides a stable reference voltage for various applications.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Reference Voltage Range: 2.5V to 36V
• Output Current: Up to 100mA
• Operating Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Temperature Stability: 50ppm/°C (typical)

Pin Configuration

The TL1431IDT IC has the following pin configuration:

```

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| | --|1 8|-- --|2 7|-- --|3 6|-- --|4 5|-- |____| ```

1. Cathode
2. Anode
3. NC (No Connection)
4. NC (No Connection)
5. NC (No Connection)
6. NC (No Connection)
7. Reference Voltage Output
8. Ground

Functional Features

• Provides a precise reference voltage that can be adjusted using external resistors.
• Acts as a shunt regulator, maintaining a stable output voltage regardless of input variations.
• Offers low temperature coefficient and high accuracy over a wide temperature range.
• Can be used as a voltage reference for various applications, such as power supplies, battery chargers, and instrumentation.

Advantages and Disadvantages

Advantages: - High precision and stability. - Adjustable reference voltage. - Wide operating temperature range. - Low temperature coefficient.

Disadvantages: - Limited output current capability (up to 100mA). - Requires external resistors for voltage adjustment.

Working Principles

The TL1431IDT operates as a shunt regulator, maintaining a stable output voltage by shunting excess current to ground. It compares the reference voltage at its internal voltage divider with the feedback voltage from the load. If the load voltage exceeds the reference voltage, the TL1431IDT starts conducting current, effectively reducing the load voltage. This feedback mechanism ensures a constant output voltage regardless of input variations.

Detailed Application Field Plans

The TL1431IDT can be used in various applications, including:

1. Power Supplies: Provides a stable reference voltage for voltage regulators, ensuring accurate and reliable power delivery.
2. Battery Chargers: Maintains a precise voltage level during the charging process, preventing overcharging or undercharging of batteries.
3. Instrumentation: Serves as a voltage reference for measurement equipment, ensuring accurate readings.

Detailed and Complete Alternative Models

1. TL431: Similar to TL1431IDT, but available in different package options such as TO-92 and SOT-23.
2. LM4040: Precision shunt voltage reference with adjustable output voltage and low temperature drift.
3. REF3030: Low-power, high-precision voltage reference with a wide operating temperature range.

These alternative models offer similar functionality and can be considered based on specific requirements and availability.

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