LM431BCM3X/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Low Output Noise - High Accuracy - Wide Operating Current Range - Low Temperature Drift - Fast Turn-On Response

Package: SOT-23-3

Essence: The LM431BCM3X/NOPB is a precision shunt regulator that can be used to provide a stable reference voltage. It is commonly used in various electronic circuits where a precise voltage reference is required.

Packaging/Quantity: The LM431BCM3X/NOPB is available in a SOT-23-3 package and is typically sold in reels of 3000 units.

Specifications

• Reference Voltage: Adjustable from 2.5V 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 Noise Voltage: 0.04% (Typical)

Pin Configuration

The LM431BCM3X/NOPB has three pins:

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

Functional Features

• Adjustable Output: The LM431BCM3X/NOPB allows the user to adjust the output voltage according to their requirements.
• Precision Voltage Reference: It provides a highly accurate and stable reference voltage for use in various applications.
• Shunt Regulation: The LM431BCM3X/NOPB uses shunt regulation to maintain a constant output voltage regardless of changes in input voltage or load conditions.
• Low Output Noise: It produces low noise output, making it suitable for noise-sensitive applications.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Wide operating current range - Low temperature drift - Fast turn-on response - Adjustable output voltage

Disadvantages: - Limited maximum output current capability - Requires an external resistor for voltage adjustment

Working Principles

The LM431BCM3X/NOPB works by comparing the reference voltage at the Reference (R) pin with a fraction of the output voltage. It adjusts the shunt resistance to maintain a constant voltage drop across it, thereby regulating the output voltage. By adjusting the reference voltage, the desired output voltage can be obtained.

Detailed Application Field Plans

The LM431BCM3X/NOPB is widely used in various electronic circuits and systems, including:

1. Voltage regulators and power supplies
2. Battery charging circuits
3. Precision measurement equipment
4. Audio amplifiers and preamplifiers
5. Industrial control systems
6. Automotive electronics
7. LED lighting applications

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LM431BCM3X/NOPB are:

1. TL431AIDBZR
2. LT1009CZ
3. MAX6126AASA25
4. REF3030AIDBZT
5. AD780BRZ

These models offer similar functionality and characteristics, providing options for different design requirements.

In conclusion, the LM431BCM3X/NOPB is a versatile precision shunt regulator that offers high accuracy, stability, and adjustable output voltage. Its wide range of applications and availability of alternative models make it a popular choice among designers and engineers in various industries.

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