Overview
The LM1117IMPX-3.3 from Texas Instruments is a low-dropout linear voltage regulator designed to provide a stable output voltage of 3.3V. This device is part of the LM1117 series, which is known for its high performance and reliability in various power management applications. The LM1117IMPX-3.3 is available in a space-saving SOT-223 package and offers features such as current limiting and thermal protection, making it suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 3.3 | V |
| Output Current | 800 | mA |
| Dropout Voltage | 1.2 (at 800 mA) | V |
| Line Regulation | 0.2% (maximum) | % |
| Load Regulation | 0.4% (maximum) | % |
| Temperature Range | –40°C to +125°C | °C |
| Package | SOT-223 | |
| Quiescent Current | 5-15 | mA |
| Ripple Rejection | 60-75 dB (at 120 Hz) | dB |
Key Features
- Low dropout voltage of 1.2V at 800mA load current
- Space-saving SOT-223 package
- Current limiting and thermal shutdown protection
- High accuracy output voltage with ±1% tolerance
- Minimum 10-µF tantalum capacitor required at the output for stability
- ESD protection exceeding Human Body Model (HBM) tests
Applications
- AC drive power stage modules
- Merchant network and server power supplies
- Industrial AC/DC power supplies
- Ultrasound scanners
- Servo drive control modules
Q & A
- What is the output voltage of the LM1117IMPX-3.3?
The output voltage of the LM1117IMPX-3.3 is 3.3V.
- What is the maximum output current of the LM1117IMPX-3.3?
The maximum output current is 800mA.
- What is the dropout voltage of the LM1117IMPX-3.3 at 800mA load current?
The dropout voltage is 1.2V at 800mA load current.
- What are the key protection features of the LM1117IMPX-3.3?
The device features current limiting and thermal shutdown protection.
- What is the recommended capacitor value for the output of the LM1117IMPX-3.3?
A minimum of 10-µF tantalum capacitor is recommended for the output to improve transient response and stability.
- What is the operating temperature range of the LM1117IMPX-3.3?
The operating temperature range is –40°C to +125°C.
- What package type is the LM1117IMPX-3.3 available in?
The device is available in a SOT-223 package.
- What is the quiescent current of the LM1117IMPX-3.3?
The quiescent current ranges from 5mA to 15mA.
- What is the ripple rejection of the LM1117IMPX-3.3?
The ripple rejection is 60-75 dB at 120 Hz.
- What are some common applications of the LM1117IMPX-3.3?
Common applications include AC drive power stage modules, merchant network and server power supplies, industrial AC/DC power supplies, ultrasound scanners, and servo drive control modules.
