TL431BCLPM

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23, TO-92
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Output Current: 1mA 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)

Detailed Pin Configuration

The TL431BCLPM has three pins:

1. Anode (A): Connected to the reference voltage input.
2. Cathode (K): Connected to the ground or negative supply.
3. Reference (R): Provides the regulated output voltage.

Functional Features

• Programmable output voltage with a wide range of options.
• High precision and stability over temperature and time.
• Low dynamic impedance for improved regulation.
• Fast response time to changes in input voltage.
• Low operating current for reduced power consumption.
• Wide operating temperature range for versatile applications.

Advantages and Disadvantages

Advantages

• Highly accurate and stable voltage reference.
• Easy to use and integrate into various circuits.
• Wide range of programmable output voltages.
• Suitable for both low and high current applications.
• Compact package options for space-constrained designs.

Disadvantages

• Requires external components for proper operation.
• Limited output current compared to some alternatives.
• Not suitable for high-power applications.

Working Principles

The TL431BCLPM is a precision shunt regulator that uses a bandgap reference to provide a stable output voltage. It compares the reference voltage at the cathode pin with an adjustable voltage divider connected to the anode pin. By adjusting the resistive divider, the output voltage can be set to the desired value. The TL431BCLPM continuously monitors the output voltage and adjusts the current flowing through the cathode pin to maintain a constant voltage.

Detailed Application Field Plans

The TL431BCLPM is widely used in various applications, including:

1. Voltage Regulation: Provides precise voltage references for analog circuits, power supplies, and battery chargers.
2. Feedback Control: Used in feedback loops to regulate and stabilize system parameters such as temperature, current, and voltage.
3. Switching Power Supplies: Ensures accurate voltage regulation in switch-mode power supply designs.
4. Battery Management: Monitors and controls battery charging and discharging processes in portable devices and automotive systems.
5. Audio Amplifiers: Maintains stable bias voltages for audio amplification stages, improving overall performance.

Detailed and Complete Alternative Models

• TL431ACLPM: Similar specifications and features, but available in different package options (SOT-23, TO-92).
• TLV431BCLP: Low-voltage version with a reference voltage range of 0.6V to 16V.
• LM4040CIM3-2.5/NOPB: Precision shunt voltage reference with a fixed output voltage of 2.5V.

These alternative models offer similar functionality and can be used as replacements depending on specific requirements.

In conclusion, the TL431BCLPM is a versatile and reliable voltage reference integrated circuit. Its programmable output voltage, high precision, and stability make it suitable for a wide range of applications. However, it has some limitations in terms of output current and power handling capabilities. Engineers can consider alternative models based on their specific needs.