The 78D09LL-TN3-R is a fixed positive voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). This regulator provides a stable 9V output, making it suitable for a wide range of applications requiring a consistent voltage supply. It's designed for ease of use and offers built-in protection features, ensuring reliable operation in diverse electronic circuits.

Applications

• Power Supply for Microcontrollers
• Voltage Regulation for Sensor Circuits
• Powering Small Electronic Devices
• Post-Regulation for Switching Power Supplies
• Battery Chargers

Features

• Fixed 9V Output Voltage
• Internal Short-Circuit Current Limiting
• Thermal Overload Protection
• Output Transistor Safe-Area Compensation
• Low Dropout Voltage

Benefits

• Provides a stable and regulated 9V supply
• Protects against damage from short circuits
• Prevents overheating under excessive load conditions
• Ensures safe operation of connected devices
• Enables efficient regulation even with low input voltage

Technical Specifications

The 78D09LL-TN3-R has an input voltage range typically up to 35V, allowing for operation with various power sources. It has built-in short-circuit current limiting and thermal overload protection, which prevents the device from damage under abnormal conditions. The specific input voltage range, output current, and other parameters can be found in the UTC datasheet for this part. The TN3 package is a small surface-mount package, which allows for compact designs. The regulator's low dropout voltage ensures regulation even when the input voltage is close to the output voltage.

The 78D09LL-TN3-R’s straightforward design, integrated protection features, and stable output make it a reliable choice for engineers needing a fixed 9V voltage regulator. Its simplicity and robustness make it suitable for a wide range of applications in electronic systems.