Overview
The LM317MTG, produced by Onsemi, is an adjustable three-terminal positive voltage regulator. It is capable of supplying more than 500 mA over an output voltage range of 1.2 V to 37 V. This regulator is known for its ease of use, requiring only two external resistors to set the output voltage. The LM317MTG features internal current limiting, thermal shutdown, and safe area compensation, making it highly reliable and essentially blow-out proof. It is suitable for a wide variety of applications, including local on-card regulation and can be used as a programmable output regulator or a precision current regulator.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Range | 1.2 V to 37 V | V |
| Output Current | Greater than 500 mA | A |
| Input-Output Voltage Differential | 40 Vdc | Vdc |
| Maximum Junction Temperature | +150 °C | °C |
| Storage Temperature Range | −65 to +150 °C | °C |
| Line Regulation | 0.01% to 0.04% per V | %/V |
| Load Regulation | 0.1% | % |
| Ripple Rejection | 66 dB to 80 dB | dB |
| Thermal Shutdown | 180 °C | °C |
Key Features
- Adjustable output voltage range from 1.2 V to 37 V
- Output current greater than 500 mA
- Internal short-circuit current limiting and thermal overload protection
- Safe operating area protection
- Low line and load regulation (0.01% and 0.1%, respectively)
- High ripple rejection ratios achievable with bypass capacitor on the adjustment terminal
- Can be used as a programmable output regulator or a precision current regulator
Applications
- Local on-card regulation
- Programmable output regulation
- Precision current regulation
- ATCA solutions
- Digital signage and still cameras
- Desktop PCs
- Motor controls (brushed DC, brushless DC, low-voltage, permanent magnet, and stepper motors)
- Power over Ethernet (PoE)
- Power bank solutions
- High-speed data acquisition and generation
Q & A
- What is the output voltage range of the LM317MTG?
The output voltage range of the LM317MTG is from 1.2 V to 37 V.
- How much output current can the LM317MTG supply?
The LM317MTG can supply more than 500 mA of output current.
- What are the key protection features of the LM317MTG?
The LM317MTG features internal short-circuit current limiting, thermal overload protection, and safe operating area protection.
- How do you set the output voltage of the LM317MTG?
The output voltage of the LM317MTG is set using two external resistors.
- What is the maximum junction temperature for the LM317MTG?
The maximum junction temperature for the LM317MTG is +150 °C.
- Can the LM317MTG be used as a precision current regulator?
Yes, the LM317MTG can be used as a precision current regulator by connecting a fixed resistor between the ADJUST and OUTPUT terminals.
- What is the ripple rejection capability of the LM317MTG?
The LM317MTG can achieve high ripple rejection ratios, typically between 66 dB and 80 dB, especially when a bypass capacitor is used on the adjustment terminal.
- What are some common applications of the LM317MTG?
Common applications include local on-card regulation, programmable output regulation, precision current regulation, and various industrial and consumer electronics applications.
- How does the LM317MTG handle thermal overload?
The LM317MTG includes thermal overload protection that shuts down the device at a temperature of around 180 °C to prevent damage.
- What is the storage temperature range for the LM317MTG?
The storage temperature range for the LM317MTG is from −65 °C to +150 °C.
