Overview
The LM317T/NOPB, produced by Texas Instruments, is a 1.5-A, 40-V, adjustable linear voltage regulator. This component is part of the LM317 series, known for its ease of use and robust performance. The LM317T/NOPB is capable of supplying a high current output over a wide voltage range, making it suitable for various applications requiring stable and adjustable voltage regulation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Current | - | - | 1.5 | A |
| Input Voltage Range | 4.25 | - | 40 | V |
| Output Voltage Range | 1.25 | - | 37 | V |
| Reference Voltage | 1.2 | 1.25 | 1.3 | V |
| Line Regulation | 0.01 | 0.04 | 0.07 | %/V |
| Load Regulation | 0.1 | - | 0.5 | % |
| PSRR (120 Hz) | - | - | 80 | dB |
| Operating Temperature Range | 0 | - | 125 | °C |
| Junction-to-Ambient Thermal Resistance (TO-220) | - | - | 23.3 | °C/W |
Key Features
- Adjustable output voltage from 1.25 V to 37 V.
- High current capability of up to 1.5 A.
- Exceptional line and load regulation.
- 80 dB ripple rejection at 120 Hz.
- Short-circuit protected output.
- Full overload protection including current limit.
- Ease of use with only two external resistors required to set the output voltage.
Applications
- Multifunction printers.
- AC drive power stage modules.
- Electricity meters.
- Servo drive control modules.
- Merchant network and server power supply units (PSUs).
Q & A
- What is the maximum output current of the LM317T/NOPB?
The maximum output current of the LM317T/NOPB is 1.5 A.
- What is the input voltage range for the LM317T/NOPB?
The input voltage range for the LM317T/NOPB is from 4.25 V to 40 V.
- How is the output voltage of the LM317T/NOPB adjusted?
The output voltage of the LM317T/NOPB is adjusted using two external resistors.
- What is the ripple rejection of the LM317T/NOPB at 120 Hz?
The ripple rejection of the LM317T/NOPB at 120 Hz is 80 dB.
- Does the LM317T/NOPB have short-circuit protection?
- What is the operating temperature range of the LM317T/NOPB?
The operating temperature range of the LM317T/NOPB is from 0°C to 125°C.
- What are some common applications of the LM317T/NOPB?
Common applications include multifunction printers, AC drive power stage modules, electricity meters, servo drive control modules, and server PSUs.
- What is the junction-to-ambient thermal resistance for the TO-220 package?
The junction-to-ambient thermal resistance for the TO-220 package is 23.3°C/W.
- Does the LM317T/NOPB require any additional components for operation?
The LM317T/NOPB requires only two external resistors to set the output voltage.
- What is the line regulation accuracy of the LM317T/NOPB?
The line regulation accuracy of the LM317T/NOPB is 0.01% to 0.07% per volt.
