The UPC78L08J is a three-terminal positive voltage regulator IC that provides a stable 8V output voltage. It is manufactured by NEC (now Renesas Electronics) and is part of the 78Lxx series of linear voltage regulators. This regulator is designed for a wide range of applications where a regulated voltage supply is needed with a low current requirement.

Applications:

• Power Supplies: Used in small power supplies to provide a stable 8V output.
• Microcontroller Power: Provides regulated power for microcontrollers and other digital logic circuits.
• Sensor Power: Supplies a stable voltage for various sensors.
• Battery Chargers: Can be used in simple battery charging circuits.
• General Purpose Regulation: Suitable for general voltage regulation in electronic projects.

Features:

• 8V Output Voltage: Provides a fixed 8V regulated output.
• Three-Terminal Package: Simple to use with only three pins (Input, Output, and Ground).
• Internal Short-Circuit Protection: Protects the regulator from damage due to short circuits.
• Thermal Overload Protection: Shuts down the regulator if the temperature exceeds safe limits.
• Small Package Size: Compact package for easy integration into various designs.

Benefits:

• Stable Voltage: Provides a consistent and reliable voltage output.
• Easy to Use: Requires minimal external components.
• Protection Features: Prevents damage from overcurrent and overheating.
• Compact Design: Allows for use in small and portable devices.
• Cost-Effective: Offers a reliable voltage regulation solution at a low cost.

Additional Details:

The UPC78L08J typically requires an input voltage between 10.5V and 25V to provide a stable 8V output. The output current is typically up to 100mA. It has internal current limiting and thermal shutdown features for protection. The operating temperature range is typically from 0°C to +125°C. It's available in a through-hole TO-92 package. Minimal external components, such as bypass capacitors, are recommended to improve stability and transient response. The dropout voltage is typically around 2V, meaning the input voltage must be at least 2V higher than the output voltage for proper regulation.