LM1117SX-3.3/NOPB

The LM1117SX-3.3/NOPB is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 3.3 volts with a maximum output current of 800 mA. This device is particularly useful in applications where space is limited and efficiency is critical, such as in portable electronics, microcontroller power supplies, and other battery-operated devices.

Key Features:

1. Output Voltage: The LM1117SX-3.3/NOPB provides a fixed output voltage of 3.3V, making it suitable for powering digital circuits and microcontrollers that require this specific voltage level.

2. Dropout Voltage: The regulator has a low dropout voltage, typically around 1.2V at full load, which allows it to maintain regulation even when the input voltage is only slightly above the output voltage. This feature is particularly beneficial in battery-powered applications where maximizing battery life is essential.

3. Current Capability: With a maximum output current of 800 mA, the LM1117SX-3.3/NOPB can support a variety of loads, making it versatile for different applications.

4. Thermal Protection: The device includes built-in thermal shutdown protection, which prevents damage due to overheating. This feature is crucial for maintaining reliability in high-temperature environments or under heavy load conditions.

5. Short-Circuit Protection: The LM1117SX-3.3/NOPB is designed with short-circuit protection, ensuring that the device can withstand fault conditions without sustaining damage.

6. Package Type: The regulator is available in a compact SOT-223 package, which is ideal for space-constrained applications. The small footprint allows for easy integration into printed circuit boards (PCBs).

7. Operating Temperature Range: The device operates over a wide temperature range, typically from -40°C to +125°C, making it suitable for industrial and automotive applications.

8. Input Voltage Range: The LM1117SX-3.3/NOPB can accept input voltages ranging from 4.75V to 15V, providing flexibility in power supply design.

9. Low Quiescent Current: The regulator features low quiescent current, which helps improve overall efficiency, especially in battery-operated devices.

Applications:

• Power supply for microcontrollers and digital circuits
• Battery-powered devices
• Portable electronics
• Point-of-load regulation
• Communication equipment

Conclusion:

The LM1117SX-3.3/NOPB from Texas Instruments is a reliable and efficient voltage regulator that meets the needs of various electronic applications. Its combination of low dropout voltage, thermal and short-circuit protection, and compact packaging makes it an excellent choice for designers looking to ensure stable power delivery in their circuits.