KA431AZ

series introduction

# Introduction to the KA431AZ Product Series

## 1. Overview
The KA431AZ is a highly versatile and widely used adjustable precision shunt regulator series. It belongs to the family of voltage reference devices that play a crucial role in a variety of electronic circuits. These regulators are designed to provide a stable and accurate reference voltage, which is essential for the proper functioning of many electronic systems.

## 2. Key Features

### 2.1 Precision Voltage Regulation
- The KA431AZ offers excellent voltage regulation capabilities. It can maintain a very precise output voltage, with a typical tolerance of ±1%. This high level of precision makes it suitable for applications where accurate voltage references are required, such as in power supplies, battery chargers, and measurement instruments.
- The reference voltage can be adjusted over a wide range, typically from 2.5V to 36V. This adjustability allows designers to tailor the regulator to meet the specific voltage requirements of their circuits.

### 2.2 Low Temperature Coefficient
- Temperature variations can have a significant impact on the performance of electronic components. The KA431AZ has a low temperature coefficient, which means that its output voltage remains relatively stable over a wide temperature range. This characteristic is particularly important in applications that are exposed to varying environmental conditions, such as automotive electronics and industrial control systems.

### 2.3 High Current Capability
- The series can sink a relatively high current, typically up to 100mA. This high current - sinking ability enables it to drive loads directly or to be used in conjunction with other components to regulate larger currents. It can be used in circuits where a significant amount of current needs to be controlled or regulated, such as in power management circuits.

### 2.4 Low Output Impedance
- With a low output impedance, the KA431AZ can provide a stable voltage even when the load current changes. This ensures that the regulated voltage remains constant under different operating conditions, improving the overall performance and reliability of the circuit.

## 3. Package Types
The KA431AZ is available in several different package types, including the TO - 92, SOT - 23, and SOIC.
- **TO - 92**: This is a through - hole package that is easy to handle and solder on printed circuit boards (PCBs). It is a popular choice for prototyping and low - volume production, as it allows for easy replacement and testing of the component.
- **SOT - 23**: A surface - mount package, the SOT - 23 is small in size, which makes it suitable for applications where space is limited. It is commonly used in portable electronic devices, such as mobile phones and tablets.
- **SOIC**: The Small Outline Integrated Circuit (SOIC) package offers a good balance between size and ease of assembly. It is widely used in mass - production applications, as it can be easily automated for pick - and - place operations on PCBs.

## 4. Applications

### 4.1 Power Supplies
- In switching power supplies, the KA431AZ is used as a voltage reference to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the control signal to the power switch, ensuring that the output voltage remains stable. This is crucial for providing a reliable power source to electronic devices, such as computers, televisions, and audio equipment.
- Linear power supplies also benefit from the use of the KA431AZ. It can be used to improve the voltage regulation and reduce the ripple in the output voltage, resulting in a cleaner and more stable power supply.

### 4.2 Battery Chargers
- Battery chargers require accurate voltage regulation to ensure that the batteries are charged safely and efficiently. The KA4

Images for reference

TO-92-3(StandardBody),TO-226_straightlead

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related Documents

• Materials 08/Aug/2008

Datasheets

• KA431/A/L
• PDF 2
• PDF 3

Partlist