The UPC78M08H is a three-terminal positive voltage regulator manufactured by NEC. This medium-current regulator provides a fixed 8V output voltage, known for its accuracy and stability. It is suitable for a variety of applications needing a regulated 8V supply, offering protection against overloads and thermal issues.

Applications

• Microcontroller Power Supplies: Used to provide a stable 8V supply for microcontrollers and associated circuitry.
• Audio Amplifiers: Regulates the power supply voltage for audio amplifiers to minimize noise and distortion.
• Sensor Power: Supplies a regulated 8V for sensors and transducers in instrumentation and control systems.
• Industrial Control Systems: Employed in industrial control systems to ensure stable power for various components.
• Battery Charging Circuits: Can be used as part of a controlled battery charging circuit.

Features

• Fixed 8V Output: Delivers a stable and precise 8V output voltage.
• Medium Output Current: Provides moderate current output (typically up to 500mA).
• Three-Terminal Design: Simple three-terminal configuration for easy integration into circuits.
• Internal Current Limiting: Features internal current limiting for protection against overloads.
• Thermal Shutdown: Offers thermal shutdown protection to prevent damage from overheating.

Benefits

• Stable and Accurate Voltage: Ensures a consistent and reliable 8V supply for sensitive components.
• Simplified Design: Easy integration into existing circuits, streamlining the design process.
• Overload Protection: Internal current limiting prevents damage from excessive current draw.
• Thermal Protection: Thermal shutdown prevents the device from overheating and potentially damaging itself or other components.
• Cost-Effective: Offers a cost-effective solution for voltage regulation in medium-current applications.

Additional Details

The UPC78M08H typically requires a minimum input voltage of around 10.5V to maintain a stable 8V output. The maximum input voltage is generally around 35V. This regulator is commonly available in a TO-252 (DPAK) or TO-220 package. The datasheet should be consulted for accurate specifications, thermal derating information, and recommended application circuits. Heat sinking may be required depending on the input voltage, output current, and ambient temperature.