Overview
The LM317AEMP/NOPB is an adjustable 3-terminal, positive-voltage regulator produced by Texas Instruments. This component is capable of supplying current in excess of 1.5 A over a 1.25-V to 37-V output range, providing 1% output-voltage accuracy. It is designed to offer superior line and load regulation compared to standard fixed regulators. The LM317AEMP/NOPB features full overload protection, including overcurrent, thermal-overload, and safe-area protection, ensuring robust performance in various applications.
Key Specifications
| Specification | Value |
|---|---|
| Package | SOT-223 (DCY) with 4 pins |
| Operating Temperature Range | -40°C to 125°C |
| Output Current | 1.5 A |
| Output Voltage Range | 1.25 V to 37 V |
| Input-Output Differential | Up to 40 V |
| Output Voltage Tolerance | 1% |
| Line Regulation | Typical 0.005%/V |
| Current Limit | Constant with temperature |
| Short-Circuit Protection | Yes |
Key Features
- Adjustable output down to 1.25 V
- No output capacitor required, unless the device is more than 6 inches from the input filter capacitors
- Optional output capacitor for improved transient response
- High ripple-rejection ratios achievable by bypassing the adjustment terminal
- Full overload protection: overcurrent, thermal-overload, and safe-area protection
- Can be used as a precision current regulator by connecting a fixed resistor between the adjustment pin and output
Applications
The LM317AEMP/NOPB is versatile and can be used in a variety of applications, including power supplies, voltage regulators, and precision current regulators. It is particularly useful in systems requiring adjustable output voltages and high current capabilities. For applications needing higher output currents, the LM150 series (3A) and LM138 series (5A) can be considered. The LM137 series serves as the negative complement for this regulator.
Q & A
- What is the maximum output current of the LM317AEMP/NOPB?
The maximum output current is 1.5 A. - What is the output voltage range of the LM317AEMP/NOPB?
The output voltage range is from 1.25 V to 37 V. - Does the LM317AEMP/NOPB require an output capacitor?
No, it typically does not require an output capacitor unless it is situated more than 6 inches from the input filter capacitors. - What is the operating temperature range of the LM317AEMP/NOPB?
The operating temperature range is -40°C to 125°C. - Does the LM317AEMP/NOPB have short-circuit protection?
Yes, it has short-circuit protected output. - Can the LM317AEMP/NOPB be used as a precision current regulator?
Yes, by connecting a fixed resistor between the adjustment pin and output. - What is the input-output differential voltage limit for the LM317AEMP/NOPB?
The input-output differential voltage limit is up to 40 V. - What are the overload protection features of the LM317AEMP/NOPB?
The LM317AEMP/NOPB features overcurrent, thermal-overload, and safe-area protection. - Is the LM317AEMP/NOPB suitable for high-voltage applications?
Yes, it can regulate supplies of several hundred volts as long as the maximum input-to-output differential is not exceeded. - What are some alternatives for higher output current requirements?
For higher output current requirements, consider the LM150 series (3A) and LM138 series (5A).
