The KA431Z is a Fairchild/ON Semiconductor adjustable precision shunt regulator. It is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage may be set to any value between Vref (approximately 2.5V) and 36V with two external resistors. This makes it a versatile component for voltage regulation, voltage monitoring, and other applications requiring a stable reference voltage.

Applications

• Linear Regulation
• Adjustable Power Supplies
• Voltage Monitoring
• Error Amplifiers
• Overvoltage Protection Circuits
• Current Source Circuits

Features

• Programmable Output Voltage
• Low Dynamic Output Impedance
• Sink Current Capability from 1mA to 100mA
• Equivalent Full Range Temperature Coefficient Typically 50 PPM/°C
• Temperature Compensated for Operation over Full Rated Operating Temperature Range
• Low Output Noise Voltage

Benefits

• Highly versatile due to its adjustable output voltage, making it suitable for a wide range of applications.
• Provides a stable and accurate reference voltage, improving the performance of voltage regulation and monitoring circuits.
• Low dynamic output impedance ensures stable operation even with varying load currents.
• Temperature compensation ensures consistent performance over a wide temperature range.

The KA431Z is commonly used in switching power supplies and linear regulators to provide a stable reference voltage for feedback control. Its versatility, precision, and stability make it a popular choice for various electronic circuits.

Technical Specifications:

• Reference Voltage (Vref): Approximately 2.5V
• Output Voltage Range: Vref to 36V
• Sink Current: 1mA to 100mA