LM1117DTX-3.3/NOPB

The LM1117DTX-3.3/NOPB is a low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 3.3V with a maximum output current of 800mA. This device is particularly useful in applications where space is limited and efficiency is crucial, such as in portable devices, microcontrollers, and other electronic circuits.

Key Features:

1. Output Voltage: The LM1117DTX-3.3 provides a fixed output voltage of 3.3V, making it suitable for powering various digital circuits and components 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 essential for battery-powered applications where maximizing battery life is important.

3. Current Capability: It can deliver up to 800mA of output current, making it capable of powering a range of devices without overheating or entering thermal shutdown.

4. Thermal Protection: The LM1117DTX-3.3/NOPB includes built-in thermal shutdown protection, which prevents damage to the device in case of overheating. This feature enhances the reliability of the regulator in various operating conditions.

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

6. Package Type: The LM1117DTX-3.3/NOPB is available in a TO-220 package, which provides good thermal performance and allows for easy mounting on a PCB. The package is designed for efficient heat dissipation, which is critical for maintaining performance under load.

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 LM1117DTX-3.3 can accept input voltages ranging from 4.75V to 15V, providing flexibility in various circuit designs.

9. Capacitor Requirements: For stable operation, the LM1117DTX-3.3 requires input and output capacitors. Typically, a 10µF tantalum or aluminum electrolytic capacitor is recommended at the output to ensure stability and transient response.

Applications:

The LM1117DTX-3.3/NOPB is widely used in various applications, including:

• Power supplies for microcontrollers and digital signal processors (DSPs)
• Battery-powered devices
• Telecommunications equipment
• Automotive electronics
• Consumer electronics

Conclusion:

The LM1117DTX-3.3/NOPB from Texas Instruments is a versatile and reliable LDO voltage regulator that provides a stable 3.3V output with a range of protective features. Its low dropout voltage, thermal protection, and ability to handle significant output current make it an excellent choice for a variety of electronic applications.