The CJ431 0.5% is a precision adjustable shunt regulator manufactured by Jiangsu Changjiang Electronics Technology Co., Ltd (JCET). This three-terminal adjustable regulator provides a highly accurate voltage reference, making it suitable for various voltage regulation and control applications. The 0.5% refers to the tight tolerance of the reference voltage, ensuring high precision in the regulated output.

Applications

• Power Supplies: Used in both linear and switching mode power supplies for precise voltage regulation.
• Battery Chargers: Implemented in battery charging circuits for accurate voltage control during charging processes.
• Instrumentation: Utilized in test and measurement equipment requiring stable and accurate voltage references.
• Voltage Monitoring: Integrated into voltage monitoring circuits to detect over-voltage and under-voltage conditions with high accuracy.
• Reference Voltage: Functions as a stable voltage reference in various electronic circuits.

Features

• Adjustable Output Voltage: The output voltage is adjustable from Vref (typically 2.5V) to 36V using external resistors.
• High Precision: Offers a very tight tolerance of 0.5% for the reference voltage, ensuring highly accurate output voltage regulation.
• Low Temperature Coefficient: Provides stable operation over a wide range of temperatures.
• Sink Current Capability: Capable of sinking current from 1mA to 100mA.
• Low Dynamic Output Impedance: Ensures stable output voltage even with varying load conditions.

Benefits

• High Accuracy: The 0.5% tolerance ensures very precise voltage regulation, critical for sensitive applications.
• Versatile Application: Suitable for a wide variety of voltage regulation and control applications.
• Stable Performance: Maintains consistent performance across a wide temperature range, enhancing reliability.
• Cost-Effective: Provides a cost-efficient solution for precision voltage regulation.
• Simplified Design: Requires only a few external components, simplifying circuit design and lowering overall cost.

Technical Specifications

The CJ431 0.5% has a reference voltage (Vref) of approximately 2.5V with a 0.5% tolerance. The operating temperature range is typically from -40°C to +85°C. Common package options include TO-92, SOT-23, and SOIC. The output voltage is calculated using the formula: Vout = Vref * (1 + R1/R2), where R1 and R2 are external resistors. It typically features a low dynamic output impedance, ensuring stable output even with varying load conditions. It is designed to sink current from 1mA to 100mA, offering flexibility in different circuit configurations.