LM431ACM/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Programmable Output Voltage - Low Dynamic Output Impedance - Wide Operating Current Range - Low Temperature Coefficient - Fast Turn-On Response - Low Output Noise

Package: SOIC-8

Essence: The LM431ACM/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 LM431ACM/NOPB is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Reference Voltage Range: 2.5V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.2%/V
• Load Regulation: 0.4%/mA
• Output Voltage Tolerance: ±1%
• Quiescent Current: 1.5mA

Pin Configuration

The LM431ACM/NOPB has the following pin configuration:

```

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| | --|REF |-- Anode --|K |-- Cathode --|A |-- Adjust |____| ```

Functional Features

• Adjustable Output Voltage: The LM431ACM/NOPB allows the user to adjust the output voltage according to their requirements.
• Precision Voltage Reference: It provides a stable and accurate reference voltage for use in various applications.
• Low Dynamic Output Impedance: The low dynamic output impedance ensures a stable output voltage even with varying load conditions.
• Wide Operating Current Range: It can operate within a wide range of current levels, making it suitable for different circuit designs.
• Fast Turn-On Response: The LM431ACM/NOPB has a fast turn-on response time, allowing for quick stabilization of the output voltage.
• Low Output Noise: It produces minimal output noise, ensuring clean and reliable voltage reference.

Advantages

• Precise and adjustable output voltage
• Wide operating current range
• Low temperature coefficient
• Fast response time
• Low output noise

Disadvantages

• Requires an external resistor for adjustment
• Limited output current capability

Working Principles

The LM431ACM/NOPB operates as a shunt regulator. It compares the reference voltage at the REF pin with the voltage across the external resistor connected to the Adjust pin. By adjusting the resistance, the output voltage can be set to the desired value. The LM431ACM/NOPB then regulates the voltage across the cathode and anode pins to match the reference voltage.

Detailed Application Field Plans

The LM431ACM/NOPB is widely used in various applications, including: 1. Voltage regulators 2. Switching power supplies 3. Battery chargers 4. Audio amplifiers 5. Instrumentation circuits 6. Precision measurement equipment

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LM431ACM/NOPB are: 1. TL431A 2. LT1634 3. MAX6126

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

In conclusion, the LM431ACM/NOPB is a versatile voltage reference IC that offers precise and adjustable output voltage. Its wide operating current range, low temperature coefficient, and fast response time make it suitable for various applications. However, it requires an external resistor for adjustment and has limited output current capability. Alternative models such as TL431A, LT1634, and MAX6126 can be considered based on specific design needs.