Overview
The LM1117IDTX-5.0 is a low dropout voltage regulator produced by National Semiconductor, now part of Texas Instruments. This device is designed to provide a stable 5V output voltage with a maximum current of 800 mA. It features a low dropout voltage of 1.2 V at 800 mA, making it suitable for a wide range of applications where voltage regulation is critical. The LM1117IDTX-5.0 is available in a TO-252 (D-PAK) package and offers current limiting and thermal shutdown protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Output Voltage | 5 V | V |
| Output Current | 800 mA | mA |
| Dropout Voltage | 1.2 V (at 800 mA) | V |
| Line Regulation | 0.2% (maximum) | % |
| Load Regulation | 0.4% (maximum) | % |
| Temperature Range | 0°C to +125°C (LM1117), -40°C to +125°C (LM1117I) | °C |
| Package Type | TO-252 (D-PAK) | - |
| Minimum Output Capacitance | 10 µF (tantalum) | µF |
Key Features
- Available in fixed 5V output and adjustable versions (1.25 V to 13.8 V with external resistors)
- Space-saving SOT-223 and WSON packages (though the LM1117IDTX-5.0 is in TO-252 package)
- Current limiting and thermal shutdown protection
- Zener trimmed band-gap reference for output voltage accuracy to within ±1%
- Minimum of 10-µF tantalum capacitor required at the output for improved transient response and stability
Applications
- Post regulator for switching DC/DC converters
- High efficiency linear regulators
- Battery chargers
- Battery-powered instrumentation
- Active termination for SCSI-2 bus
Q & A
- What is the maximum output current of the LM1117IDTX-5.0?
The maximum output current is 800 mA.
- What is the dropout voltage of the LM1117IDTX-5.0 at 800 mA?
The dropout voltage is 1.2 V at 800 mA.
- What is the temperature range for the LM1117IDTX-5.0?
The temperature range is 0°C to +125°C.
- What type of package does the LM1117IDTX-5.0 come in?
The LM1117IDTX-5.0 comes in a TO-252 (D-PAK) package.
- What is the minimum output capacitance required for the LM1117IDTX-5.0?
A minimum of 10-µF tantalum capacitor is required at the output.
- Does the LM1117IDTX-5.0 have built-in protection features?
Yes, it includes current limiting and thermal shutdown protection.
- How accurate is the output voltage of the LM1117IDTX-5.0?
The output voltage accuracy is within ±1% due to the Zener trimmed band-gap reference.
- Can the LM1117IDTX-5.0 be used in battery-powered devices?
Yes, it is suitable for battery-powered instrumentation and other battery-powered applications.
- What are some common applications of the LM1117IDTX-5.0?
Common applications include post regulators for switching DC/DC converters, high efficiency linear regulators, battery chargers, and active termination for SCSI-2 bus.
- Is the LM1117IDTX-5.0 available in adjustable output voltage versions?
Yes, the LM1117 series includes adjustable versions that can set the output voltage from 1.25 V to 13.8 V with external resistors.
