The UA79MGHC is a negative voltage regulator manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It provides a stable, regulated negative voltage output for various electronic circuits. This series of regulators is known for its reliability and ease of use in applications requiring a negative power supply.

Applications

• Linear power supplies: Providing regulated negative voltage rails for analog circuits.
• Instrumentation: Supplying stable voltage for sensitive measurement equipment.
• Audio amplifiers: Powering operational amplifiers and other audio circuitry.
• Data acquisition systems: Regulating voltage for analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
• Industrial control systems: Providing regulated power for control circuits and sensors.

Features

• Adjustable output voltage: Allows for precise voltage regulation.
• Internal short-circuit current limiting: Protects the regulator from damage due to overload.
• Thermal overload protection: Prevents overheating and potential failure.
• High ripple rejection: Minimizes output voltage fluctuations due to input voltage variations.
• Three-terminal package: Simplifies circuit design and reduces component count.

Benefits

• Stable voltage output: Ensures consistent performance of connected circuits.
• Overload protection: Prevents damage from excessive current or temperature.
• Easy to use: Simplifies power supply design.
• Reliable operation: Provides long-term stability and performance.
• Cost-effective solution: Offers a balance of performance and affordability.

Additional Details

The UA79MGHC is typically packaged in a TO-220 package, which facilitates heat dissipation. Its adjustable output voltage can be set using external resistors, allowing designers to tailor the output voltage to their specific needs. The regulator's internal protection features, such as short-circuit current limiting and thermal overload protection, enhance its reliability and prevent damage in fault conditions. Fairchild/ON Semiconductor provides detailed datasheets for this regulator, including specifications for input voltage range, output voltage range, load regulation, and line regulation. Proper heat sinking may be required, depending on the load current and input voltage, to prevent overheating and ensure reliable operation. The UA79MGHC serves as a robust building block in constructing stable negative voltage power supplies.