LM431CCMX

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: SOT-23

Essence: The LM431CCMX is a precision shunt regulator that can be programmed to output a specific voltage. It is commonly used in electronic circuits to provide a stable reference voltage for various applications.

Packaging/Quantity: The LM431CCMX is available in a SOT-23 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Coefficient: 50ppm/°C
• Output Voltage Tolerance: ±0.5%
• Maximum Cathode Current: 150mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM431CCMX has three pins:

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

Functional Features

• Adjustable Output Voltage: The LM431CCMX allows the user to set the desired output voltage by connecting external resistors.
• Precision Voltage Reference: It provides a stable and accurate reference voltage for precise circuit operation.
• Shunt Regulation: The LM431CCMX regulates the voltage by shunting excess current to the ground.
• Fast Response Time: It has a fast turn-on response, making it suitable for applications requiring quick voltage stabilization.
• Low Output Noise: The LM431CCMX generates minimal output noise, ensuring clean and reliable voltage reference.

Advantages and Disadvantages

Advantages: - Wide operating current range allows flexibility in various applications. - Adjustable output voltage provides versatility. - Low temperature coefficient ensures stable performance over a wide temperature range. - Fast response time is beneficial for time-critical applications.

Disadvantages: - Limited maximum cathode current may restrict its use in high-power applications. - SOT-23 package may require surface-mount soldering skills.

Working Principles

The LM431CCMX operates as a shunt regulator by comparing the reference voltage at the Reference (R) pin with an external voltage divider network. It adjusts the shunting current through the Cathode (K) pin to maintain a constant voltage across the load. By changing the resistors in the voltage divider, the output voltage can be precisely programmed.

Detailed Application Field Plans

The LM431CCMX finds applications in various fields, including:

1. Power Supplies: It is used as a voltage reference in power supply circuits to ensure stable and accurate output voltages.
2. Battery Charging: The LM431CCMX is employed in battery charging circuits to provide a precise reference voltage for controlling the charging process.
3. Audio Amplifiers: It is utilized in audio amplifier circuits to establish a stable bias voltage for improved audio quality.
4. Temperature Sensors: The LM431CCMX serves as a voltage reference in temperature sensor circuits to provide accurate temperature measurements.
5. Voltage Monitoring: It is used in voltage monitoring circuits to detect and regulate voltage levels within specific limits.

Detailed and Complete Alternative Models

Some alternative models to the LM431CCMX are:

1. TL431ACDBZR
2. LT1009CZ
3. MAX6126AASA25
4. REF3030AIDBZT
5. AD780BRZ

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

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