Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| Series | SIMPLE SWITCHER® |
| ProductStatus | Not For New Designs |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Adjustable |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 8V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 1.2V |
| Voltage-Output(Max) | 37V |
| Current-Output | 3A |
| Frequency-Switching | 260kHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Through Hole |
| Package/Case | TO-220-7 Formed Leads |
Tổng quan
Description
The LM2676T-ADJ is a switch-mode DC-DC buck converter developed by Texas Instruments. Designed for efficient voltage regulation, it converts higher DC input voltages to a lower DC output voltage. This adjustable version allows output voltage flexibility from 1.2V to 37V, depending on external resistor configuration. The device can deliver up to 3A of continuous current, making it suitable for power-intensive applications.
Key features include a high switching frequency of 260 kHz, which enables smaller external components and a more compact design. The LM2676T-ADJ also boasts a built-in thermal shutdown, current limiting, and a soft-start feature to minimize inrush current. Its high efficiency, typically above 90%, reduces heat generation and enhances performance in power-sensitive environments.
The device is commonly used in various applications, including power supplies for industrial equipment, telecommunications, and embedded systems, where precise voltage regulation and high efficiency are crucial. Its TO-220 package ensures easy mounting and good thermal performance.
Key features include a high switching frequency of 260 kHz, which enables smaller external components and a more compact design. The LM2676T-ADJ also boasts a built-in thermal shutdown, current limiting, and a soft-start feature to minimize inrush current. Its high efficiency, typically above 90%, reduces heat generation and enhances performance in power-sensitive environments.
The device is commonly used in various applications, including power supplies for industrial equipment, telecommunications, and embedded systems, where precise voltage regulation and high efficiency are crucial. Its TO-220 package ensures easy mounting and good thermal performance.
Equivalent
The LM2676T-ADJ is a step-down voltage regulator. Equivalent products with similar specifications include the LM2596-ADJ, LM2675-ADJ, and LM22676-ADJ. These alternatives typically offer similar input voltage range, output current capability, and adjustable output voltage. Always check specific parameters such as switching frequency and efficiency to ensure compatibility with your application.
Features
The LM2676T-ADJ is a step-down voltage regulator with adjustable output, known for its high efficiency and ease of use. Key features include:
1. Adjustable Output Voltage: Allows the output to be set between 1.2V and 37V.
2. High Efficiency: Capable of delivering up to 96% efficiency depending on the output voltage and load conditions.
3. High Output Current: Provides up to 3A continuous output current.
4. Wide Input Voltage Range: Operates with an input voltage range from 8V to 40V.
5. Fixed Frequency Operation: Typically operates at 260 kHz, reducing the size of external components.
6. Simple Design: Incorporates all necessary control circuitry and reduces the need for external components.
7. Protection Features: Includes thermal shutdown, current limit protection, and undervoltage lockout to ensure reliable performance.
8. Soft Start Capability: Reduces inrush current during start-up for better performance.
9. Standard TO-220 Package: Facilitates easy heat dissipation and mounting.
These features make the LM2676T-ADJ suitable for various applications, including power supplies and battery-powered devices.
1. Adjustable Output Voltage: Allows the output to be set between 1.2V and 37V.
2. High Efficiency: Capable of delivering up to 96% efficiency depending on the output voltage and load conditions.
3. High Output Current: Provides up to 3A continuous output current.
4. Wide Input Voltage Range: Operates with an input voltage range from 8V to 40V.
5. Fixed Frequency Operation: Typically operates at 260 kHz, reducing the size of external components.
6. Simple Design: Incorporates all necessary control circuitry and reduces the need for external components.
7. Protection Features: Includes thermal shutdown, current limit protection, and undervoltage lockout to ensure reliable performance.
8. Soft Start Capability: Reduces inrush current during start-up for better performance.
9. Standard TO-220 Package: Facilitates easy heat dissipation and mounting.
These features make the LM2676T-ADJ suitable for various applications, including power supplies and battery-powered devices.
Pinout
The LM2676T-ADJ is a step-down voltage regulator from Texas Instruments. It has a total of 5 pins. Here's a brief on their functions:
1. Vin (Pin 1): This is the input voltage pin where the unregulated DC input voltage is applied.
2. SW (Pin 2): The switch pin, connected to the internal power switch. It's the output of the power switch used to connect the inductor.
3. Ground (Pin 3): This is the ground pin for the device, serving as the return path for the input and output currents.
4. FB (Pin 4): The feedback pin is used to set the output voltage by connecting it to a resistive voltage divider network from the output.
5. ON/OFF (Pin 5): This pin is used to enable or disable the regulator. A low input on this pin disables the device, putting it into a low power mode, while a high input enables it.
These pins work together to provide efficient power conversion from a higher input voltage to a lower output voltage, making the LM2676T-ADJ suitable for various applications requiring adjustable output voltages.
1. Vin (Pin 1): This is the input voltage pin where the unregulated DC input voltage is applied.
2. SW (Pin 2): The switch pin, connected to the internal power switch. It's the output of the power switch used to connect the inductor.
3. Ground (Pin 3): This is the ground pin for the device, serving as the return path for the input and output currents.
4. FB (Pin 4): The feedback pin is used to set the output voltage by connecting it to a resistive voltage divider network from the output.
5. ON/OFF (Pin 5): This pin is used to enable or disable the regulator. A low input on this pin disables the device, putting it into a low power mode, while a high input enables it.
These pins work together to provide efficient power conversion from a higher input voltage to a lower output voltage, making the LM2676T-ADJ suitable for various applications requiring adjustable output voltages.
Manufacturer
The LM2676T-ADJ is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company headquartered in Dallas, Texas. It is one of the largest semiconductor companies in the world and specializes in designing and manufacturing semiconductors and integrated circuits for various applications. TI's products are used in a wide range of electronics, including industrial equipment, automotive systems, personal electronics, and communications devices. The company is known for its innovation and contributions to the electronics industry, offering a broad portfolio of analog and embedded processing products.
Application
The LM2676T-ADJ is a high-efficiency step-down voltage regulator used in various applications. Its typical application areas include:
1. Power Supply Solutions: Provides adjustable output voltage for powering microcontrollers, DSPs, FPGAs, and other digital circuits.
2. Battery-Powered Devices: Enhances battery life by efficiently managing power conversion.
3. Industrial and Automotive Systems: Used in applications requiring a stable power supply under varying load conditions.
4. Embedded Systems: Supplies regulated voltage for embedded applications requiring low noise and high efficiency.
5. Consumer Electronics: Powers devices like set-top boxes and gaming consoles.
Its versatility, efficiency, and adjustable output make it suitable for various power management tasks.
1. Power Supply Solutions: Provides adjustable output voltage for powering microcontrollers, DSPs, FPGAs, and other digital circuits.
2. Battery-Powered Devices: Enhances battery life by efficiently managing power conversion.
3. Industrial and Automotive Systems: Used in applications requiring a stable power supply under varying load conditions.
4. Embedded Systems: Supplies regulated voltage for embedded applications requiring low noise and high efficiency.
5. Consumer Electronics: Powers devices like set-top boxes and gaming consoles.
Its versatility, efficiency, and adjustable output make it suitable for various power management tasks.
Package
The LM2676T-ADJ is a step-down voltage regulator typically available in a TO-220 package. This package offers a through-hole mounting configuration, which is suitable for applications requiring efficient heat dissipation.
