規格
| 屬性 | 價值 |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | SIMPLE SWITCHER® |
| ProductStatus | Obsolete |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Fixed |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 8V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 12V |
| Current-Output | 3A |
| Frequency-Switching | 260kHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA |
概述
Description
The LM2676SX-12 is a high-efficiency step-down voltage regulator designed by Texas Instruments. It is part of the LM2676 series, which features simple, easy-to-use solutions for efficiently converting higher DC input voltages to lower DC output voltages. Specifically, the LM2676SX-12 is configured to provide a fixed 12V output.
Key features of this regulator include a wide input voltage range (up to 40V), a 3A output current capability, and efficiency levels up to 90%, making it suitable for applications requiring high power efficiency. Its simple design minimizes component count, facilitating ease of use in power management circuits.
The LM2676SX-12 also incorporates protection features such as thermal shutdown and current limiting, ensuring reliable operation under a variety of conditions. With its TO-263 surface-mount package, it supports compact design layouts, which is advantageous in space-constrained applications. Typical applications include distributed power systems, battery-powered devices, and as a pre-regulator in complex power supply systems.
Key features of this regulator include a wide input voltage range (up to 40V), a 3A output current capability, and efficiency levels up to 90%, making it suitable for applications requiring high power efficiency. Its simple design minimizes component count, facilitating ease of use in power management circuits.
The LM2676SX-12 also incorporates protection features such as thermal shutdown and current limiting, ensuring reliable operation under a variety of conditions. With its TO-263 surface-mount package, it supports compact design layouts, which is advantageous in space-constrained applications. Typical applications include distributed power systems, battery-powered devices, and as a pre-regulator in complex power supply systems.
Equivalent
Equivalent products to the LM2676SX-12, which is a step-down voltage regulator, include:
1. LM2676T-12 - Similar specifications in a different package.
2. LM2675-12 - Lower current version.
3. L4971 - STMicroelectronics offers similar functionality.
4. MC34063A - A popular alternative with configurable options.
5. LM2596-12 - Widely used with similar output voltage.
6. L78S12CV - Fixed output with comparable current capacity.
Ensure compatibility with your specific requirements before substituting.
1. LM2676T-12 - Similar specifications in a different package.
2. LM2675-12 - Lower current version.
3. L4971 - STMicroelectronics offers similar functionality.
4. MC34063A - A popular alternative with configurable options.
5. LM2596-12 - Widely used with similar output voltage.
6. L78S12CV - Fixed output with comparable current capacity.
Ensure compatibility with your specific requirements before substituting.
Features
The LM2676SX-12 is a high-efficiency step-down (buck) voltage regulator designed for various power management applications. Key features include:
1. Output Voltage: Fixed output voltage of 12V.
2. Input Voltage Range: Designed to handle a wide range of input voltages, typically up to 40V.
3. Output Current: Capable of delivering up to 3A output current.
4. Efficiency: High efficiency, often exceeding 90%, which minimizes heat generation.
5. Switching Frequency: Operates at a fixed frequency, typically 260 kHz, allowing for smaller external components.
6. Thermal and Short-Circuit Protection: Built-in thermal shutdown and current limit protection enhance reliability and safety.
7. Soft Start Feature: Reduces inrush current during startup, protecting connected components.
8. Low External Component Count: Simplifies design and reduces PCB space.
9. Package: Available in a TO-263 surface-mount package, aiding in heat dissipation.
These features make the LM2676SX-12 suitable for various applications, including industrial, automotive, and consumer electronics, where efficient voltage regulation is essential.
1. Output Voltage: Fixed output voltage of 12V.
2. Input Voltage Range: Designed to handle a wide range of input voltages, typically up to 40V.
3. Output Current: Capable of delivering up to 3A output current.
4. Efficiency: High efficiency, often exceeding 90%, which minimizes heat generation.
5. Switching Frequency: Operates at a fixed frequency, typically 260 kHz, allowing for smaller external components.
6. Thermal and Short-Circuit Protection: Built-in thermal shutdown and current limit protection enhance reliability and safety.
7. Soft Start Feature: Reduces inrush current during startup, protecting connected components.
8. Low External Component Count: Simplifies design and reduces PCB space.
9. Package: Available in a TO-263 surface-mount package, aiding in heat dissipation.
These features make the LM2676SX-12 suitable for various applications, including industrial, automotive, and consumer electronics, where efficient voltage regulation is essential.
Pinout
The LM2676SX-12 is a step-down voltage regulator with a fixed output voltage of 12V. It comes in a TO-263 package and typically has a 5-pin configuration. Here is a brief overview of its pin functions:
1. VIN: This is the input voltage pin. It accepts a wide range of input voltages and supplies power to the regulator.
2. SW: The switching output pin. It connects to the inductor and diode and is responsible for the power switch output.
3. GND: Ground pin for the device. It is the reference point for all voltages and must be connected to the system ground.
4. FB: Feedback pin. This is used to monitor the output voltage for comparison with a reference to maintain voltage regulation.
5. ON/OFF: This pin is used to enable or disable the regulator. Applying a logic high or low signal can control the operation of the device.
The LM2676SX-12 is designed for efficient DC-DC conversion, delivering up to 3A load current with a high level of efficiency and minimal external components.
1. VIN: This is the input voltage pin. It accepts a wide range of input voltages and supplies power to the regulator.
2. SW: The switching output pin. It connects to the inductor and diode and is responsible for the power switch output.
3. GND: Ground pin for the device. It is the reference point for all voltages and must be connected to the system ground.
4. FB: Feedback pin. This is used to monitor the output voltage for comparison with a reference to maintain voltage regulation.
5. ON/OFF: This pin is used to enable or disable the regulator. Applying a logic high or low signal can control the operation of the device.
The LM2676SX-12 is designed for efficient DC-DC conversion, delivering up to 3A load current with a high level of efficiency and minimal external components.
Manufacturer
The LM2676SX-12 is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company that designs and manufactures semiconductors and various integrated circuits. They are a leading producer of analog technology components and embedded processors, which are used in a wide range of electronic applications. TI serves various industries, including automotive, industrial, personal electronics, communications, and enterprise systems. The company is well-known for its innovation and extensive product portfolio, catering to both consumer and industrial markets globally.
Application
The LM2676SX-12 is a step-down voltage regulator commonly used in applications requiring efficient power conversion with a fixed 12V output. Its application areas include:
1. Consumer Electronics: Power supply for devices like set-top boxes and gaming consoles.
2. Industrial Automation: Energy-efficient power for sensors and control systems.
3. Communications Equipment: Powering routers, modems, and network switches.
4. Automotive: Voltage regulation for infotainment systems and electronic control units (ECUs).
5. Embedded Systems: Supplying microcontrollers and peripheral devices.
6. LED Lighting: Regulating power for LED drivers and strips.
Its high efficiency, ease of use, and ability to support a wide range of input voltages make it versatile for various applications.
1. Consumer Electronics: Power supply for devices like set-top boxes and gaming consoles.
2. Industrial Automation: Energy-efficient power for sensors and control systems.
3. Communications Equipment: Powering routers, modems, and network switches.
4. Automotive: Voltage regulation for infotainment systems and electronic control units (ECUs).
5. Embedded Systems: Supplying microcontrollers and peripheral devices.
6. LED Lighting: Regulating power for LED drivers and strips.
Its high efficiency, ease of use, and ability to support a wide range of input voltages make it versatile for various applications.
Package
The LM2676SX-12 is a step-down voltage regulator from Texas Instruments, provided in a TO-263 (also known as D2PAK or DDPAK) package. This type of package is suitable for surface mounting and offers efficient thermal management, making it ideal for applications requiring space-saving and reliable power regulation.
