## Overview of Diodes Inc. AZ431AN-ATRG1

The AZ431AN-ATRG1 is a programmable shunt voltage reference from Diodes Incorporated, designed to provide accurate and stable voltage references for various applications. This device is widely used in power supplies, battery management systems, and other electronic circuits requiring precise voltage regulation. With its adjustable output voltage and low noise characteristics, the AZ431AN-ATRG1 is suitable for both consumer and industrial applications.

## Key Features

1. Programmable Output Voltage: The output voltage can be set between 2.5V and 36V, making it versatile for different circuit designs.

2. High Accuracy: The device offers excellent accuracy, ensuring that the output voltage remains stable under varying conditions.

3. Low Output Noise: The AZ431AN maintains low noise levels, which is critical for sensitive applications.

4. Wide Operating Temperature Range: It operates effectively across a temperature range of -40°C to +125°C, allowing for use in harsh environments.

5. Low Quiescent Current: The device consumes minimal current during operation, enhancing energy efficiency in battery-powered applications.

6. Compact Package: Available in a 3-lead SOT-23 package, it is suitable for space-constrained designs.

## Specifications

Here are the detailed specifications for the AZ431AN-ATRG1:

| Parameter | Specification |
|------------------------------------|--------------------------------------------|
| Product Type | Programmable Shunt Voltage Reference |
| Output Voltage | 2.5V to 36V (programmable) |
| Reference Voltage | 2.5V (typical) |
| Output Impedance | 0.2Ω (typical) at Vref = 2.5V |
| Temperature Coefficient | 50 ppm/°C (typical) |
| Accuracy | ±1% (max) at +25°C |
| Dynamic Impedance | 0.05Ω (typical) |
| Max Reverse Input Voltage | 37V |
| Supply Current | 100 µA (typical) |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | SOT-23 (3-lead) |

## Pin Configuration

The AZ431AN-ATRG1 comes in a compact 3-lead SOT-23 package with the following pin configuration:

| Pin Number | Pin Name | Description |
|------------|-----------|----------------------------------------------|
| 1 | Ref | Reference voltage output |
| 2 | Anode | Anode input, connected to the load |
| 3 | Cathode | Cathode output, connects to the ground |

## Functional Description

The AZ431AN-ATRG1 functions as a voltage reference and shunt regulator. Here’s a breakdown of its operation:

1. Voltage Reference: The internal reference provides a stable output voltage of 2.5V. This reference voltage can be adjusted to meet specific application requirements by configuring external resistors.

2. Feedback Mechanism: By connecting external resistors, the output voltage can be set to a desired level. The feedback loop ensures that the output adapts to changes in load or supply voltage, maintaining regulation.

3. Shunt Regulation: When used in shunt mode, the AZ431 acts like a variable resistor, sinking excess current and maintaining the desired voltage across the load.

4. Temperature Stability: The device is designed to maintain its performance over a wide temperature range, making it a reliable choice for demanding environments.

## Applications

The AZ431AN-ATRG1 is suitable for a variety of applications, including:

1. Power Supply Circuits: Used in linear and switching power supplies to maintain stable output voltages.

2. Battery Management Systems: Provides accurate voltage references for monitoring and managing battery performance.

3. Voltage Regulation: Acts as a precision voltage regulator in various electronic devices.

4. Signal Conditioning: Enhances the performance of analog signals by providing stable reference voltages.

5. Consumer Electronics: Employed in devices such as chargers and audio equipment where low noise and high accuracy are essential.

## Advantages

- Versatility: The adjustable output voltage allows for widespread applicability across different electronic designs.

- High Stability: Low temperature coefficient ensures stable performance, even in fluctuating environmental conditions.

- Compact Design: The small package size makes it ideal for modern electronic devices with limited space.

- Low Power Consumption: Its low quiescent current makes it suitable for battery-operated applications, enhancing overall energy efficiency.

## Conclusion

The AZ431AN-ATRG1 from Diodes Inc. is an exceptional programmable shunt voltage reference that combines high accuracy, low noise, and versatility. Its wide output voltage range and compact size make it a popular choice for engineers looking to implement reliable voltage regulation in their designs. For more detailed information, including application circuits and further technical data, it is advisable to refer to the official Diodes Inc. datasheet.