LM431AIZ/NOPB

The LM431AIZ/NOPB is a precision voltage reference and adjustable shunt regulator manufactured by Texas Instruments. It is designed to provide a stable reference voltage for various applications, including power supplies, voltage regulation, and signal conditioning.

Key Features:

1. Adjustable Output Voltage: The LM431 allows for an adjustable output voltage range from 2.5V to 36V, making it versatile for different circuit requirements. The output voltage can be set using external resistors.

2. High Accuracy: The device boasts a typical reference voltage accuracy of ±1% at 25°C, ensuring reliable performance in precision applications.

3. Low Output Impedance: The LM431 features low output impedance, which helps maintain a stable output voltage even under varying load conditions.

4. Temperature Stability: The reference voltage is designed to be stable over a wide temperature range, with a temperature coefficient of typically 50 ppm/°C, ensuring consistent performance in varying environmental conditions.

5. Wide Supply Voltage Range: The device operates over a wide supply voltage range, typically from 2.5V to 36V, allowing it to be used in various power supply designs.

6. Fast Response Time: The LM431 has a fast response time, making it suitable for applications that require quick adjustments to output voltage.

7. Low Noise: The device is designed to minimize noise, which is crucial for sensitive analog applications.

8. Package Options: The LM431AIZ/NOPB is available in a compact 3-pin SOT-23 package, which is ideal for space-constrained designs.

9. Applications: Common applications include power supply circuits, battery chargers, voltage regulation, and as a reference in analog-to-digital converters (ADCs).

Pin Configuration:

• Pin 1 (Ref): Reference voltage output, typically connected to a resistor divider to set the output voltage.
• Pin 2 (Anode): Connects to the load or the circuit where the regulated voltage is needed.
• Pin 3 (Cathode): Connects to the ground or the negative side of the power supply.

Electrical Characteristics:

• Supply Current: The device typically consumes low quiescent current, enhancing efficiency in battery-powered applications.
• Output Current: The LM431 can source or sink current, making it suitable for various load conditions.

Conclusion:

The LM431AIZ/NOPB from Texas Instruments is a highly versatile and reliable voltage reference and shunt regulator, ideal for applications requiring precision voltage regulation. Its adjustable output, high accuracy, and low noise characteristics make it a popular choice among engineers for designing robust electronic circuits.