The ZRA400A03 is a precision adjustable shunt regulator from Zetex Semiconductors (now Diodes Incorporated). It provides a stable and accurate voltage reference, making it suitable for various voltage regulation and monitoring applications.

Applications:

• Linear Regulators: Used as a voltage reference in linear regulators for improved stability and accuracy.
• Switch-Mode Power Supplies: Provides a precise voltage reference for controlling the output voltage in SMPS designs.
• Voltage Monitoring: Enables precise voltage monitoring in various electronic circuits to detect over-voltage or under-voltage conditions.
• Instrumentation: Used as a stable reference in measurement equipment to ensure accurate readings.
• Battery Chargers: Can be implemented in battery charging circuits to provide a precise voltage cutoff.

Features:

• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, providing design flexibility.
• Low Temperature Coefficient: Offers stable performance over a wide temperature range.
• Low Output Noise: Provides a clean and stable reference voltage, minimizing noise in sensitive applications.
• Tight Tolerance: Offers a precise output voltage tolerance for accurate voltage regulation.
• Low Dynamic Output Impedance: Ensures stable operation even with varying load conditions.

Benefits:

• Improved Voltage Regulation: The precision voltage reference ensures stable and accurate voltage regulation in power supplies and other circuits.
• Enhanced Accuracy: The tight tolerance and low temperature coefficient contribute to enhanced accuracy in voltage monitoring and control applications.
• Design Flexibility: The adjustable output voltage provides design flexibility to accommodate different voltage requirements.
• Reliable Performance: The robust design and stable performance ensure reliable operation in demanding environments.
• Cost-Effective Solution: Provides a cost-effective solution for achieving precise voltage regulation and monitoring.

Additional Details: The ZRA400A03 typically operates with a low cathode current, minimizing power consumption. It is available in various packages, including through-hole and surface-mount options, offering flexibility in board layout and manufacturing. The device's ability to maintain a stable output voltage even with fluctuations in input voltage and load current makes it well-suited for applications where reliability is critical. It finds use in telecom power supplies, server power supplies and general industrial applications requiring stable reference voltages.