The UPC78L12T-E1 is a three-terminal positive voltage regulator from Renesas Electronics (formerly NEC). This series of regulators are designed to provide a stable and accurate output voltage for a variety of applications. The UPC78L12T-E1 specifically provides a fixed output voltage of 12V with a low dropout voltage and a maximum output current of 100mA.

Applications

• Power supply for small electronic devices: Commonly used in applications where a stable 12V supply is needed for microcontrollers, sensors, or other low-power components.
• Voltage regulation in battery-powered systems: Helps to maintain a constant voltage supply despite variations in battery voltage, ensuring consistent performance.
• Post-regulation for switching power supplies: Can be used to further filter and stabilize the output of a switching power supply.
• Linear regulator for noise-sensitive applications: Provides a clean and stable voltage source, minimizing noise and ripple.
• Simple on-card regulation: Offers a convenient way to provide a regulated 12V supply directly on a printed circuit board (PCB).

Features

• Fixed 12V Output Voltage: Provides a precise and stable 12V output.
• Output Current up to 100mA: Suitable for low to medium current applications.
• Internal Short-Circuit Current Limiting: Protects the regulator and the connected load from damage in case of a short circuit.
• Thermal Overload Protection: Shuts down the regulator if the internal temperature exceeds a safe limit, preventing overheating.
• No External Components Required: Simplifies the design and reduces the overall cost.
• Compact Package: Typically available in a small TO-92 package for easy integration into space-constrained applications.

Benefits

• Stable and Accurate Voltage Supply: Ensures reliable operation of connected devices by providing a consistent 12V output.
• Protection against Overload and Short Circuits: Increases the reliability and longevity of the system by preventing damage from electrical faults.
• Simplified Design: Reduces the design effort and component count, saving time and cost.
• Compact Size: Enables integration into small and portable devices.
• Improved System Performance: Minimizes noise and ripple, leading to better performance in sensitive applications.

Additional Details

The UPC78L12T-E1 requires a minimum input voltage slightly above 12V to operate correctly. The dropout voltage is typically around 2V. It is important to consider thermal management, especially at higher input voltages and output currents. A small heatsink might be necessary to prevent overheating. The device is typically available in a TO-92 package, which is easy to solder and mount on a PCB. Consult the datasheet for detailed electrical characteristics, thermal considerations, and application guidelines.