KA431AZ Programmable Shunt Regulator – Precision Voltage Reference

Description

The KA431AZ is a three-terminal programmable shunt regulator that acts as a precision voltage reference with excellent thermal stability. Designed to perform like a programmable Zener diode, its output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using only two external resistors. This flexibility makes it an essential component for a wide array of voltage regulation and reference applications.

Engineered for high performance, the KA431AZ offers a sharp turn-on characteristic and low dynamic output impedance, ensuring consistent and stable operation across varying load and input conditions. Whether you are designing feedback loops for switching power supplies, implementing voltage monitors, or creating adjustable reference circuits, this IC provides the precision and reliability required for professional-grade electronic systems. Its robust design and wide operating range make it a versatile staple in modern circuit design.

Key Features

• Programmable Output Voltage: Easily set your desired voltage level between 2.5V and 36V using a simple resistor-divider network.
• High Stability: Offers excellent thermal stability and precision, maintaining accuracy across a wide range of operating temperatures.
• Sharp Turn-on Characteristics: Provides clear and reliable regulation, essential for precision timing and control circuits.
• Low Dynamic Output Impedance: Ensures consistent performance even under changing current demands.
• Versatile Application: Ideal for use as a voltage reference, a shunt regulator, or a feedback controller in power supply circuits.

Application

• Power Supply Feedback: A standard choice for the secondary-side feedback loop in isolated switching mode power supplies (SMPS).
• Precision Voltage Reference: Provides a steady, adjustable reference voltage for analog-to-digital converters (ADCs) and precision instrumentation.
• Battery Chargers: Used to maintain precise voltage control during the charging cycle of various battery chemistries.
• Voltage Monitoring: Excellent for constructing over-voltage or under-voltage detection circuits.
• Custom Circuitry: A fundamental tool for engineers and hobbyists for any project requiring a tunable, high-precision voltage source.

Package Includes

• 1 x KA431AZ Programmable Shunt Regulator IC

Technical Specifications

Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.