L78L33ABD-TR PMIC - Voltage Regulators - Linear by STMicroelectronics

The L78L33ABD-TR is a low-dropout (LDO) voltage regulator manufactured by STMicroelectronics. It is designed to provide a stable output voltage of 3.3V with a maximum output current of 100mA. This component is particularly useful in applications where space is limited, as it comes in a compact surface-mount package.

Key Features:

1. Output Voltage: The L78L33ABD-TR provides a fixed output voltage of 3.3V, making it suitable for powering various digital circuits and microcontrollers that require this specific voltage level.

2. Current Rating: It can deliver up to 100mA of output current, which is adequate for many low-power applications.

3. Low Dropout Voltage: The device features a low dropout voltage, typically around 1.2V at full load, which allows it to maintain regulation even when the input voltage is close to the output voltage. This is particularly beneficial in battery-powered applications where maximizing battery life is crucial.

4. Thermal Protection: The L78L33ABD-TR includes built-in thermal overload protection, which helps prevent damage to the device in case of overheating.

5. Short-Circuit Protection: It also features short-circuit protection, ensuring that the device can withstand fault conditions without sustaining damage.

6. Wide Input Voltage Range: The regulator can accept a wide range of input voltages, typically from 5V to 30V, making it versatile for various power supply configurations.

7. Low Quiescent Current: The device has a low quiescent current, which is beneficial for battery-operated devices, as it helps to extend battery life.

8. Package Type: The L78L33ABD-TR is available in a small SOT-89 package, which is ideal for space-constrained applications. The compact size allows for easy integration into printed circuit boards (PCBs).

9. Applications: This voltage regulator is commonly used in consumer electronics, portable devices, and other applications where a stable 3.3V power supply is required. It is suitable for powering microcontrollers, sensors, and other low-power digital devices.

Electrical Characteristics:

• Input Voltage Range: 5V to 30V
• Output Voltage: 3.3V
• Maximum Output Current: 100mA
• Dropout Voltage: Typically 1.2V at full load
• Quiescent Current: Low, typically in the range of microamperes

Conclusion:

The L78L33ABD-TR from STMicroelectronics is a reliable and efficient voltage regulator that provides a fixed 3.3V output with low dropout and current capabilities suitable for a variety of applications. Its compact size, thermal protection features, and low quiescent current make it an excellent choice for modern electronic designs where space and power efficiency are critical.