NCP431AVDR2G

Product Overview

Category: Voltage Reference
Use: Voltage regulation and precision measurement applications
Characteristics: High accuracy, low dropout voltage, low temperature coefficient
Package: SOT-23-3
Essence: Precision shunt voltage reference
Packaging/Quantity: Tape and Reel (3000 units per reel)

Specifications

• Output Voltage: 1.24V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 50 ppm/°C
• Dropout Voltage: 400mV
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NCP431AVDR2G is a three-pin device with the following pin configuration:

1. Cathode (K): Connected to the load or ground
2. Anode (A): Connected to the input voltage source
3. Reference (R): Provides a stable output voltage

Functional Features

• Precise voltage reference: The NCP431AVDR2G provides a highly accurate and stable output voltage of 1.24V.
• Low dropout voltage: With a dropout voltage of only 400mV, the device can regulate voltages close to its output voltage without significant power loss.
• Low temperature coefficient: The temperature coefficient of 50 ppm/°C ensures that the output voltage remains stable over a wide range of temperatures.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Low dropout voltage - Wide operating temperature range - Small package size

Disadvantages: - Limited output voltage options - Requires an external resistor for precise voltage selection

Working Principles

The NCP431AVDR2G operates as a precision shunt voltage reference. It compares the voltage across a precision resistor (connected between the Anode and Cathode pins) with an internal reference voltage of 1.24V. The device adjusts its current flow through the resistor to maintain a constant voltage drop, thereby providing a stable output voltage at the Reference pin.

Detailed Application Field Plans

The NCP431AVDR2G is commonly used in various applications that require precise voltage regulation and measurement. Some typical application fields include:

1. Power Supplies: The device can be used as a voltage reference for linear regulators, ensuring accurate and stable output voltages.
2. Industrial Control Systems: It is suitable for precision measurement circuits, where a stable voltage reference is essential for accurate readings.
3. Automotive Electronics: The NCP431AVDR2G finds applications in automotive systems such as engine control units (ECUs), where reliable voltage references are crucial for proper operation.

Detailed and Complete Alternative Models

• TL431: Similar precision shunt voltage reference with adjustable output voltage.
• LM4040: Precision micropower shunt voltage reference with different output voltage options.
• REF3030: Low-power, low-dropout voltage reference with high accuracy.

Please note that these alternative models may have different specifications and package options, so it is important to select the one that best suits your specific requirements.

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