Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| ProductStatus | Obsolete |
| OutputConfiguration | Positive |
| OutputType | Adjustable |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 1.2V |
| Voltage-Output(Max) | 37V |
| Current-Output | 500mA |
| PSRR | 80dB ~ 65dB (120Hz) |
| ProtectionFeatures | Over Current, Over Temperature, Short Circuit |
| OperatingTemperature | 0°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-252-3, DPak (2 Leads + Tab), SC-63 |
Tổng quan
Description
The LM317MDT is a versatile, adjustable voltage regulator designed to provide output voltages ranging from 1.25V to 37V with a current output of up to 1.5A. It is widely used in power supply circuits due to its ability to provide a stable output voltage with minimal external components. The device features internal current limiting, thermal overload protection, and safe area compensation, ensuring reliable operation under various conditions.
The LM317MDT is equipped with a three-terminal design, which includes an input, output, and adjustment pin. By using a pair of resistors connected to the adjustment pin, users can set the desired output voltage. Its robust design allows it to handle a wide range of voltages and currents, making it suitable for applications in consumer electronics, industrial equipment, and more.
This regulator is available in various package types, including TO-220, TO-263, and D2PAK, catering to different thermal and mechanical requirements. Its ease of use and reliability make it a popular choice for both hobbyists and professional engineers.
The LM317MDT is equipped with a three-terminal design, which includes an input, output, and adjustment pin. By using a pair of resistors connected to the adjustment pin, users can set the desired output voltage. Its robust design allows it to handle a wide range of voltages and currents, making it suitable for applications in consumer electronics, industrial equipment, and more.
This regulator is available in various package types, including TO-220, TO-263, and D2PAK, catering to different thermal and mechanical requirements. Its ease of use and reliability make it a popular choice for both hobbyists and professional engineers.
Equivalent
Equivalent products to the LM317MDT voltage regulator include:
1. L78S05CV
2. LM1117
3. LM338
4. LM350
5. NCP1117
6. MCP1826
7. UA7805
These are adjustable positive voltage regulators used in various power management applications. It's important to check the specific requirements like output current and voltage range compatibility when selecting an equivalent.
1. L78S05CV
2. LM1117
3. LM338
4. LM350
5. NCP1117
6. MCP1826
7. UA7805
These are adjustable positive voltage regulators used in various power management applications. It's important to check the specific requirements like output current and voltage range compatibility when selecting an equivalent.
Features
The LM317MDT is a versatile, adjustable voltage regulator capable of supplying a stable output voltage ranging from 1.25V to 37V with an output current up to 500mA. It features a high line and load regulation and offers thermal overload protection, current limit protection, and safe area compensation, ensuring reliable and stable operation under various conditions. The device has low standby current and low output noise, making it suitable for a variety of applications. Its TO-252 (DPAK) package allows for efficient heat dissipation, facilitating use in compact spaces. The LM317MDT is commonly used in power supply designs for electronic devices requiring a regulated voltage output.
Pinout
The LM317MDT is a voltage regulator IC with a pin count of 3. It is specifically designed to provide a stable output voltage that is adjustable. Here are the pin functions:
1. Input (Pin 1): This is the input pin where the unregulated voltage is connected. It accepts a higher voltage than the desired output voltage.
2. Output (Pin 2): This is the output pin that provides the regulated voltage. The output voltage is adjustable and can be set using external resistors.
3. Adjust (Pin 3): This pin is used to adjust the output voltage. By connecting resistors between the output and adjust pin, the output voltage can be varied according to the desired level.
The LM317 can supply output voltages ranging from 1.25V to 37V with an output current capability of up to 1.5A, given adequate heat sinking. It is widely used for power supply applications due to its versatility and ease of use.
1. Input (Pin 1): This is the input pin where the unregulated voltage is connected. It accepts a higher voltage than the desired output voltage.
2. Output (Pin 2): This is the output pin that provides the regulated voltage. The output voltage is adjustable and can be set using external resistors.
3. Adjust (Pin 3): This pin is used to adjust the output voltage. By connecting resistors between the output and adjust pin, the output voltage can be varied according to the desired level.
The LM317 can supply output voltages ranging from 1.25V to 37V with an output current capability of up to 1.5A, given adequate heat sinking. It is widely used for power supply applications due to its versatility and ease of use.
Manufacturer
The LM317MDT is manufactured by STMicroelectronics. STMicroelectronics is a multinational electronics and semiconductor manufacturer headquartered in Geneva, Switzerland. It is one of the world's largest semiconductor companies and provides a wide range of products and solutions for various applications, including industrial, automotive, personal electronics, and communications. The company is known for its innovation and expertise in areas such as microcontrollers, power management, sensors, and analog devices.
Application
The LM317MDT is a versatile adjustable voltage regulator used in various applications, including power supply design, battery chargers, and LED drivers. It is ideal for providing stable voltage regulation in circuit designs where output voltage needs to be adjustable. It can also be used in current-limiting circuits for battery charging applications. The LM317MDT is suitable for use in consumer electronics, industrial automation systems, and communication equipment due to its ability to maintain a constant output voltage despite variations in input voltage and load conditions. Additionally, it can be used in experimental projects and prototyping for educational purposes and DIY electronics.
Package
The LM317MDT is a voltage regulator that comes in a DPAK (TO-252) package. This package type is designed for surface mounting and provides a compact form factor suitable for various applications where space is limited.
