The UPC78L08T is a three-terminal positive voltage regulator manufactured by NEC. This regulator provides a fixed 8V output voltage, making it suitable for a wide range of electronic applications that require a stable voltage source. The device is designed to be easy to use and requires minimal external components, simplifying circuit design. These regulators are commonly used in applications such as power supplies for microcontrollers, sensors, and other electronic circuits.

Applications:

• Power supply for microcontrollers and digital logic circuits.
• Voltage regulation in battery-powered devices.
• Linear regulation in consumer electronics.
• Powering sensors and analog circuits.
• Post-regulation for switching power supplies.
• General-purpose voltage regulation.

Features:

• Fixed 8V Output Voltage: Provides a stable and regulated 8V output.
• Internal Short-Circuit Current Limiting: Protects the regulator and the load from damage caused by short circuits.
• Thermal Overload Protection: Prevents the regulator from overheating and potentially failing.
• Output Transistor Safe-Area Compensation: Protects the output transistor from exceeding its safe operating area.
• Minimal External Components: Requires only a few external capacitors for stable operation.
• Small Package: Typically available in a compact package (e.g., SOT-89) for space-constrained applications.

Benefits:

• Reliable Voltage Regulation: Ensures a stable 8V output, protecting sensitive components from voltage fluctuations.
• Simplified Circuit Design: Requires minimal external components, reducing complexity and cost.
• Protection Features: Built-in protection features enhance the reliability and lifespan of the regulator and connected circuitry.
• Easy to Use: Simple three-terminal configuration makes it easy to integrate into existing designs.
• Cost-Effective: Provides a low-cost solution for voltage regulation requirements.

Additional Details:

The UPC78L08T typically comes in a small plastic package such as SOT-89. The input voltage must be higher than the 8V output voltage, with a maximum limit often around 30V or 35V. Important electrical characteristics include the output voltage tolerance (typically ±5%), the quiescent current (the current consumed by the regulator itself), and the maximum output current (typically 100mA). Thermal resistance is a key factor in determining the regulator's ability to dissipate heat; proper thermal management may be needed in higher-current applications. The datasheet specifies the operating temperature range, absolute maximum ratings, and comprehensive electrical specifications.