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LM2576SX-3.3
IC REG BUCK 3.3V 3A TO263-5
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規格
| 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) | 4V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 3.3V |
| Current-Output | 3A |
| 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 |
概述
Description
The LM2576SX-3.3 is a step-down voltage regulator designed to efficiently convert a higher DC input voltage to a lower DC output voltage, specifically fixed at 3.3 volts. Part of the LM2576 series by Texas Instruments, it is known for its simplicity, ease of use, and high efficiency. The device can deliver an output current of up to 3A, making it suitable for applications requiring moderate power levels.
Key features include a wide input voltage range, typically from 4V to 40V, and a fixed 3.3V output with 4% tolerance. The LM2576SX-3.3 integrates a switching regulator, inductor, diode, and capacitors to minimize external component count and size. It operates at a switching frequency of 52 kHz, which helps in reducing the size of external components.
Protection features such as thermal shutdown, current limit, and short-circuit protection are built-in, enhancing reliability. It is available in a surface-mount TO-263 package, which is suitable for space-constrained designs. This regulator is widely used in consumer electronics, industrial equipment, and various other applications where a stable 3.3V power supply is required.
Key features include a wide input voltage range, typically from 4V to 40V, and a fixed 3.3V output with 4% tolerance. The LM2576SX-3.3 integrates a switching regulator, inductor, diode, and capacitors to minimize external component count and size. It operates at a switching frequency of 52 kHz, which helps in reducing the size of external components.
Protection features such as thermal shutdown, current limit, and short-circuit protection are built-in, enhancing reliability. It is available in a surface-mount TO-263 package, which is suitable for space-constrained designs. This regulator is widely used in consumer electronics, industrial equipment, and various other applications where a stable 3.3V power supply is required.
Features
The LM2576SX-3.3 is a step-down voltage regulator capable of delivering a fixed 3.3V output. It is designed for high efficiency and simplicity in various applications. Key features include:
1. Output Current: Can deliver up to 3A output current.
2. Efficiency: High efficiency up to approximately 90%, depending on the input voltage and load conditions.
3. Input Voltage Range: Operates from a wide input voltage range of 4V to 40V.
4. Fixed Output Voltage: Provides a stable 3.3V output.
5. Switching Frequency: Typically operates at 52 kHz, allowing the use of small external components.
6. Protection Features: Includes over-current and thermal shutdown protection to prevent damage under fault conditions.
7. Simple Design: Requires minimal external components, simplifying the design process.
8. Low Dropout Voltage: Allows for efficient operation close to the output voltage level.
9. Package: Available in a TO-263 surface mount package, which aids in efficient heat dissipation.
Overall, the LM2576SX-3.3 is suitable for a variety of applications, including power supply systems for embedded circuits, battery-powered devices, and efficient power conversion solutions.
1. Output Current: Can deliver up to 3A output current.
2. Efficiency: High efficiency up to approximately 90%, depending on the input voltage and load conditions.
3. Input Voltage Range: Operates from a wide input voltage range of 4V to 40V.
4. Fixed Output Voltage: Provides a stable 3.3V output.
5. Switching Frequency: Typically operates at 52 kHz, allowing the use of small external components.
6. Protection Features: Includes over-current and thermal shutdown protection to prevent damage under fault conditions.
7. Simple Design: Requires minimal external components, simplifying the design process.
8. Low Dropout Voltage: Allows for efficient operation close to the output voltage level.
9. Package: Available in a TO-263 surface mount package, which aids in efficient heat dissipation.
Overall, the LM2576SX-3.3 is suitable for a variety of applications, including power supply systems for embedded circuits, battery-powered devices, and efficient power conversion solutions.
Package
The LM2576SX-3.3 is packaged in a TO-263 surface-mount package. This package type is specifically designed for efficient heat dissipation and is commonly used in applications requiring a compact, robust solution for power management.
Pinout
The LM2576SX-3.3 is a step-down voltage regulator IC with a fixed output voltage of 3.3V. It typically comes in a TO-263 package with a 5-pin configuration. Here is a brief overview of the pin functions:
1. Vin (Pin 1): This is the input pin where the unregulated input voltage is applied. The device accepts input voltages ranging from 7V to 40V.
2. Output (Pin 2): This pin provides the regulated output voltage of 3.3V.
3. Ground (Pin 3): This pin serves as the ground reference and is connected to the ground of the input and output circuits.
4. Feedback (Pin 4): This pin is used for feedback to maintain the regulated output. For the fixed version, this pin is typically connected internally.
5. ON/OFF (Pin 5): This pin is used to enable or disable the regulator. A high signal turns the device off, while a low or grounded signal turns it on.
The LM2576SX-3.3 is commonly used in applications requiring a simple, efficient step-down DC-DC conversion.
1. Vin (Pin 1): This is the input pin where the unregulated input voltage is applied. The device accepts input voltages ranging from 7V to 40V.
2. Output (Pin 2): This pin provides the regulated output voltage of 3.3V.
3. Ground (Pin 3): This pin serves as the ground reference and is connected to the ground of the input and output circuits.
4. Feedback (Pin 4): This pin is used for feedback to maintain the regulated output. For the fixed version, this pin is typically connected internally.
5. ON/OFF (Pin 5): This pin is used to enable or disable the regulator. A high signal turns the device off, while a low or grounded signal turns it on.
The LM2576SX-3.3 is commonly used in applications requiring a simple, efficient step-down DC-DC conversion.
Manufacturer
The LM2576SX-3.3 is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and manufactures a wide range of analog and embedded processing chips. They focus on developing innovative solutions for electronics, catering to various markets including automotive, industrial, personal electronics, and communications.
Application
The LM2576SX-3.3 is a step-down voltage regulator used in various applications, including power supply solutions for embedded systems, industrial automation equipment, automotive electronics, and communication devices. It provides efficient voltage conversion for microcontrollers, sensors, and other low-power components requiring a stable 3.3V supply. Its features make it suitable for battery-powered devices, consumer electronics, and distributed power systems where reliable, compact, and efficient voltage regulation is essential.
Equivalent
The LM2576SX-3.3 is a step-down voltage regulator by Texas Instruments. Equivalent products from other manufacturers include the ON Semiconductor MC34063, the STMicroelectronics L4971, and the Microchip Technology TC1262. When choosing an equivalent, ensure compatibility with the input voltage range, output current, and package style. Always verify the specific requirements of your application when selecting an alternative.
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