TL431BVLPRAG

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics:
  • Adjustable precision shunt regulator
  • Programmable output voltage
  • Low dynamic impedance
  • Wide operating current range
• Package: TO-92 (3-Lead)
• Essence: Precision voltage reference
• Packaging/Quantity: Bulk packaging, typically sold in reels of 2,500 units

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% typical
• Load Regulation: 0.4% typical
• Output Voltage Tolerance: ±1%
• Cathode Current: 1mA to 100mA
• Anode Current: 1mA to 150mA

Pin Configuration

The TL431BVLPRAG has a standard TO-92 package with three leads:

1. Anode (A): Connected to the positive terminal of the power supply.
2. Cathode (K): Connected to the load or ground.
3. Reference (R): Provides the regulated output voltage.

Functional Features

• Precise voltage reference for various applications
• Adjustable output voltage through external resistors
• Low temperature coefficient
• High stability over time and temperature
• Low dynamic impedance for improved regulation

Advantages

• Wide operating current range allows flexibility in different applications
• Programmable output voltage provides customization options
• Excellent line and load regulation for stable performance
• Compact TO-92 package suitable for space-constrained designs
• Cost-effective solution for voltage reference needs

Disadvantages

• Limited maximum output current compared to some other voltage references
• TO-92 package may not be suitable for high-power applications

Working Principles

The TL431BVLPRAG is a precision shunt regulator that maintains a stable output voltage regardless of input variations. It operates by comparing the reference voltage at the Reference (R) pin with an external voltage divider network connected to the Anode (A) and Cathode (K) pins. By adjusting the resistors in the voltage divider, the desired output voltage can be set.

When the input voltage exceeds the reference voltage, the TL431BVLPRAG starts conducting current from the Anode to the Cathode, regulating the output voltage. This feedback mechanism ensures a constant output voltage even when the input voltage or load conditions change.

Detailed Application Field Plans

The TL431BVLPRAG finds applications in various fields, including:

1. Power Supplies: Provides stable voltage references for linear and switching power supplies.
2. Battery Charging Systems: Ensures accurate voltage regulation during battery charging processes.
3. Audio Amplifiers: Maintains precise biasing voltages for improved audio signal quality.
4. Voltage Monitoring Circuits: Used as a voltage comparator or threshold detector in monitoring circuits.
5. Industrial Control Systems: Provides reliable voltage references for control systems and sensors.

Detailed Alternative Models

1. TL431ACLPRAG: Similar specifications and features, but available in a SOT-23 package.
2. TLV431BQDBZR: Low-voltage version with a reference voltage range of 0.6V to 6V.
3. LM4040AIM3-2.5/NOPB: Precision shunt voltage reference with a fixed output voltage of 2.5V.

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

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