STMicroelectronics Positive Linear Voltage Regulator 3.3V 100mA SOT-89
STMicroelectronics L78L series 3.3V fixed positive linear voltage regulator. 100mA output, SOT-89 surface mount package with thermal shutdown.
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
- For local or on-card regulation
- For elimination of noise and distribution problems associated with single-point regulation
- For high-current voltage regulators (when used with power pass elements)
- As a zener diode/resistor combination replacement
- Series: L78L
- Output Type: Fixed
- Number of Outputs: 1
- Output Voltage (Nominal): 3.3V
- Max Input Voltage: 30V
- Max Output Current: 100mA
- Max Quiescent Current: 6mA
- Output Noise Voltage: 40µV typical
- Supply Voltage Rejection: 49dB typical
- Number of Pins: 3
- Mounting Type: Surface Mount
- Package: SOT-89
- Operating Temperature Range: -40°C to 125°C
- Weight: 0.05 grams
- Height: 43 mm
- Width: 33 mm
- Depth: 15 mm
- Output Voltage Nom: 3.3V
- Input Voltage Max: 30V
- Product Range: 3.3V 100mA Linear Voltage Regulators
- Output Current Max: 100mA
- IC Case / Package: 0
- of Pins: 3Pins
- IC Mounting: Surface Mount
- Operating Temperature Min: -40°C
- Operating Temperature Max: 125°C
- SVHC: No SVHC (25-Jun-2025)
Always follow local regulations and product guidance.
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