STMicroelectronics Positive Linear Voltage Regulator 3.3V 100mA SOT-89

The STMicroelectronics Positive Linear Voltage Regulator from the L78L series is a three-terminal device designed for reliable and stable voltage regulation. It features internal current limiting and thermal shutdown, providing robust protection for your circuits. When used with an adequate heat-sink, this regulator can deliver an output current of up to 100mA.

This device is intended for use as a fixed voltage regulator across a wide range of applications. It is particularly suited for local or on-card regulation, which helps eliminate noise and distribution problems associated with single-point regulation. Furthermore, it can be paired with power pass elements to create high-current voltage regulators. Using the L78L series as a replacement for a zener diode and resistor combination offers distinct advantages, including lower quiescent current and reduced noise levels.

Key Features & Benefits

• Fixed Output Voltage: 3.3V typical at 25°C
• Maximum Output Current: 100mA
• Short-Circuit Protection: Built-in safety feature
• No External Components Required: Simplifies circuit design and implementation
• Low Noise: Output noise voltage of 40µV typical
• Supply Voltage Rejection: 49dB typical
• Package Type: SOT-89 surface mount with 3 pins
• Operating Temperature Range: -40°C to 125°C
• Compact Dimensions: 43 mm x 33 mm x 15 mm
• Lightweight: Weighs just 0.05 grams