仕様
| 属性 | 値 |
| Package | Tape & Reel (TR) |
| Series | SIMPLE SWITCHER® |
| ProductStatus | Obsolete |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Fixed |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 4V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 12V |
| Current-Output | 1A |
| Frequency-Switching | 52kHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA |
概要
Description
The LM2575SX-12 is a monolithic integrated circuit designed by Texas Instruments. It functions as a step-down (buck) voltage regulator, which efficiently converts a higher input voltage to a stable, lower output voltage. Specifically, it outputs a fixed 12V voltage and can deliver up to 1A of load current. The device operates over a wide input voltage range, typically from 4V to 40V, making it suitable for a variety of applications, including automotive, industrial, and consumer electronics.
Key features of the LM2575SX-12 include a high-efficiency of up to 88%, a built-in current limiting, thermal shutdown, and an output switch, which simplifies the circuit design by reducing the number of external components needed. It requires only a few external components such as an inductor, a diode, and a capacitor to function effectively. Additionally, it has a fixed switching frequency of 52 kHz, which helps minimize output voltage ripple and electromagnetic interference (EMI). The device is available in a TO-263 surface-mount package, facilitating ease of use in space-constrained applications.
Key features of the LM2575SX-12 include a high-efficiency of up to 88%, a built-in current limiting, thermal shutdown, and an output switch, which simplifies the circuit design by reducing the number of external components needed. It requires only a few external components such as an inductor, a diode, and a capacitor to function effectively. Additionally, it has a fixed switching frequency of 52 kHz, which helps minimize output voltage ripple and electromagnetic interference (EMI). The device is available in a TO-263 surface-mount package, facilitating ease of use in space-constrained applications.
Equivalent
The LM2575SX-12 is a buck (step-down) voltage regulator. Equivalent products with similar specifications include: LM2596-12, LM2675-12, L7805, and MC34063. These alternatives are also commonly used for regulating or stepping down voltage in power supply applications, although specifications such as current output and efficiency might vary slightly. Always check the datasheets for exact compatibility with your application needs.
Features
The LM2575SX-12 is a simple switcher power regulator designed for efficient voltage regulation. Key features include:
1. Output Voltage: Fixed output voltage of 12V.
2. Input Voltage Range: Wide input voltage range from 4V to 40V.
3. Output Current: Capable of delivering up to 1A continuous output current.
4. Efficiency: High efficiency up to 88%, reducing heat and increasing battery life in portable applications.
5. Switching Frequency: Fixed switching frequency of 52 kHz.
6. Thermal Protection: Integrated thermal shutdown to prevent damage from overheating.
7. Current Limiting: Built-in current limiting for protection against short circuits.
8. Package: Available in a surface-mount TO-263 package.
9. Simple Design: Minimal external components required, simplifying the design process.
10. Low Standby Current: Low standby current for better energy conservation in standby mode.
This voltage regulator is ideal for use in a variety of applications, including power supply systems, battery chargers, and distributed power systems.
1. Output Voltage: Fixed output voltage of 12V.
2. Input Voltage Range: Wide input voltage range from 4V to 40V.
3. Output Current: Capable of delivering up to 1A continuous output current.
4. Efficiency: High efficiency up to 88%, reducing heat and increasing battery life in portable applications.
5. Switching Frequency: Fixed switching frequency of 52 kHz.
6. Thermal Protection: Integrated thermal shutdown to prevent damage from overheating.
7. Current Limiting: Built-in current limiting for protection against short circuits.
8. Package: Available in a surface-mount TO-263 package.
9. Simple Design: Minimal external components required, simplifying the design process.
10. Low Standby Current: Low standby current for better energy conservation in standby mode.
This voltage regulator is ideal for use in a variety of applications, including power supply systems, battery chargers, and distributed power systems.
Pinout
The LM2575SX-12 is a simple step-down (buck) voltage regulator designed to provide a fixed output voltage of 12V. It is part of the LM2575 series, which are monolithic integrated circuits that offer all the active functions for a step-down (buck) switching regulator capable of driving a 1A load with excellent line and load regulation.
The LM2575SX-12 comes in a TO-263 surface-mount package with 5 pins:
1. VIN: Input voltage pin where the unregulated DC input is applied.
2. Output: Provides the regulated 12V output.
3. Ground: Common ground for both input and output.
4. Feedback: Used to set the output voltage through a resistor divider network. In fixed versions like the LM2575SX-12, it's typically internally connected.
5. ON/OFF: Allows for shutdown of the regulator to reduce power consumption during standby mode.
This regulator is widely used in various applications due to its simplicity, requiring minimal external components and offering protection features like thermal shutdown and current limiting.
The LM2575SX-12 comes in a TO-263 surface-mount package with 5 pins:
1. VIN: Input voltage pin where the unregulated DC input is applied.
2. Output: Provides the regulated 12V output.
3. Ground: Common ground for both input and output.
4. Feedback: Used to set the output voltage through a resistor divider network. In fixed versions like the LM2575SX-12, it's typically internally connected.
5. ON/OFF: Allows for shutdown of the regulator to reduce power consumption during standby mode.
This regulator is widely used in various applications due to its simplicity, requiring minimal external components and offering protection features like thermal shutdown and current limiting.
Manufacturer
The LM2575SX-12 is manufactured by Texas Instruments, a technology company that designs and manufactures semiconductors and various integrated circuits. Texas Instruments is based in Dallas, Texas, and is one of the largest semiconductor companies in the world. They produce a wide range of products including analog chips and embedded processors that are used in various electronic devices and applications across multiple industries. The company has a strong focus on innovation and development in electronics and plays a significant role in advancing semiconductor technology.
Application
The LM2575SX-12 is a step-down voltage regulator designed for applications requiring efficient power conversion. It is commonly used in:
1. Power supply for microcontrollers and digital circuits.
2. Battery-powered equipment to extend battery life by reducing power consumption.
3. Consumer electronics for efficient voltage regulation.
4. Industrial automation systems for stable power supply.
5. Communication equipment where precise voltage levels are crucial.
6. Automotive applications for powering various electronics.
7. Embedded systems requiring a 12V output from higher voltage sources.
Its ease of use and reliability make it suitable for a wide range of electronic designs that require a regulated 12V output.
1. Power supply for microcontrollers and digital circuits.
2. Battery-powered equipment to extend battery life by reducing power consumption.
3. Consumer electronics for efficient voltage regulation.
4. Industrial automation systems for stable power supply.
5. Communication equipment where precise voltage levels are crucial.
6. Automotive applications for powering various electronics.
7. Embedded systems requiring a 12V output from higher voltage sources.
Its ease of use and reliability make it suitable for a wide range of electronic designs that require a regulated 12V output.
Package
The LM2575SX-12 is a step-down voltage regulator available in a surface-mount TO-263 package. It's designed for efficient power conversion and provides a fixed 12V output with a maximum output current of 1A.
