Overview
The LM317MDT-TR is a monolithic integrated circuit produced by STMicroelectronics, designed as a positive adjustable voltage regulator. It is available in TO-252-3 (DPAK) packages and is part of the LM317 series. This regulator is capable of supplying up to 500 mA of load current with an output voltage adjustable over a range of 1.2 to 37 volts. The device is exceptionally easy to configure using a simple resistive divider, eliminating the need for multiple fixed regulators. It features comprehensive protection mechanisms including thermal overload protection, short-circuit protection, and output transition safe area compensation, making it suitable for a variety of high-voltage applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Min) | 3 | V |
| Input Voltage (Max) | 40 | V |
| Output Voltage Range | 1.2 to 37 | V |
| Output Current (Max) | 500 | mA |
| Operating Temperature Range | 0 to 125 | °C |
| Line Regulation | 0.01 to 0.05 %/V | |
| Load Regulation | 0.1 to 1 %/VO | |
| Thermal Resistance Junction-Case | 8 | °C/W |
| Thermal Resistance Junction-Ambient | 100 | °C/W |
| Package Style | TO-252-3 (DPAK) | |
| Mounting Method | Surface Mount |
Key Features
- Output voltage range: 1.2 to 37 V
- Output current in excess of 500 mA
- Line regulation: 0.01 to 0.05 %/V
- Load regulation: 0.1 to 1 %/VO
- Floating operation for high voltage applications
- Complete series of protections: current limiting, thermal shutdown, and SOA control
- Output transition safe area compensation
- Short-circuit protection and thermal overload protection
Applications
The LM317MDT-TR is suitable for a wide range of applications requiring adjustable voltage regulation. These include:
- Power supplies for electronic equipment
- High-voltage applications where floating operation is necessary
- Precision current regulation by configuring the device with a fixed resistor between the adjustment and output pins
- Remote ground sensing to optimize load regulation
- General-purpose voltage regulation in various industrial and consumer electronics
Q & A
- What is the output voltage range of the LM317MDT-TR?
The output voltage range is 1.2 to 37 volts.
- What is the maximum output current of the LM317MDT-TR?
The maximum output current is 500 mA.
- What type of package does the LM317MDT-TR come in?
The LM317MDT-TR comes in a TO-252-3 (DPAK) package.
- What are the key protection features of the LM317MDT-TR?
The key protection features include thermal overload protection, short-circuit protection, and output transition safe area compensation.
- How is the output voltage of the LM317MDT-TR adjusted?
The output voltage is adjusted using a simple resistive divider.
- What is the operating temperature range of the LM317MDT-TR?
The operating temperature range is 0 to 125 °C.
- Does the LM317MDT-TR support floating operation for high voltage applications?
Yes, it supports floating operation for high voltage applications.
- What is the typical line regulation of the LM317MDT-TR?
The typical line regulation is 0.01 to 0.05 %/V.
- Can the LM317MDT-TR be used as a precision current regulator?
Yes, it can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output pins.
- What is the thermal resistance junction-case of the LM317MDT-TR in DPAK package?
The thermal resistance junction-case is 8 °C/W.
