Overview
The KA431S, KA431SA, and KA431SL are three-terminal programmable shunt regulators with adjustable output voltage ranging from VREF (approximately 2.5 V) to 36 V. They have a low dynamic output impedance of 0.2 Ω and a guarantee of thermal sink current capability from 1.0 to 100 mA.
The regulators boast a fast turn-on response and a high degree of stability, making them an excellent replacement for zener diodes in various applications.
Key Features
- Programmable output voltage between VREF (2.5 V) and 36 V
- Low dynamic output impedance: 0.2 Ω (typical)
- Guaranteed thermal sink current capability: 1.0 to 100 mA
- Fast turn-on response
- High stability over operating temperature range
These regulators are available in the SOT-23F package and are available with various tolerance options (1%, 0.5%, or 2%).
Block Diagram and Marking Information
A block diagram is provided, showing the circuit’s internal components and their relationships. The marking information for each package is also listed.
Absolute Maximum Ratings and Recommended Operating Conditions
The absolute maximum ratings specify the maximum limits for voltage, current, and temperature. The recommended operating conditions define the optimal operating conditions for the device to ensure optimal performance.
Electrical Characteristics
The electrical characteristics table lists the typical and maximum values for each parameter, including output voltage, current, and impedance.
Test Circuits and Typical Applications
Test circuits are provided to demonstrate the device’s operation. Typical applications include shunt regulators, output control for three-terminal fixed regulators, high current shunt regulators, current limit or current source, and constant-current sink.
Manual:
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