LM431CCM3/NOPB

Product Overview

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

Specifications

• Reference Voltage Range: 2.5V 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 LM431CCM3/NOPB has three pins:

1. Anode (A): Connected to the reference voltage input.
2. Cathode (C): Connected to the ground or negative supply voltage.
3. Adjust (ADJ): Output pin that provides the adjustable reference voltage.

Functional Features

• Precision Voltage Reference: The LM431CCM3/NOPB provides a highly accurate and stable reference voltage.
• Adjustable Output: The output voltage can be adjusted using external resistors to set the desired reference voltage.
• Shunt Regulator: It acts as a shunt regulator by maintaining a constant voltage drop between the Anode and Cathode pins.
• Low Quiescent Current: The LM431CCM3/NOPB consumes very low current when in operation, making it suitable for low-power applications.

Advantages and Disadvantages

Advantages: - High precision and stability - Wide range of adjustable reference voltages - Low quiescent current consumption - Small package size

Disadvantages: - Limited output current capability - Requires external resistors for voltage adjustment

Working Principles

The LM431CCM3/NOPB is a programmable precision reference that operates as a shunt regulator. It compares the reference voltage at the Anode pin with the voltage at the Adjust pin. By adjusting the voltage at the Adjust pin, the desired reference voltage can be set. The LM431CCM3/NOPB maintains a constant voltage drop between the Anode and Cathode pins, providing a stable reference voltage.

Detailed Application Field Plans

The LM431CCM3/NOPB is widely used in various applications, including:

1. Voltage Regulation: It is commonly used as a voltage reference in power supplies, battery chargers, and voltage regulators.
2. Feedback Control: It can be used in feedback control circuits to maintain precise voltage levels.
3. Battery Management: The LM431CCM3/NOPB is suitable for battery management systems, ensuring accurate voltage monitoring and control.
4. Precision Instrumentation: It finds application in precision instrumentation equipment where stable and accurate reference voltages are required.

Detailed and Complete Alternative Models

Some alternative models to the LM431CCM3/NOPB include:

1. TL431AIDBZR: SOT-23 package, adjustable precision shunt regulator.
2. LM4040CIM3-2.5/NOPB: SOT-23 package, precision micropower shunt voltage reference.
3. LT1004CZ-2.5#PBF: TO-92 package, precision reference voltage source.

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

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