Спецификации
| Атрибут | Ценность |
| Package | Bulk |
| 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 | Surface Mount |
| Package/Case | TO-263-8, D²Pak (7 Leads + Tab), TO-263CA |
Обзор
Description
The LM2673S-ADJ is a high-efficiency step-down voltage regulator from Texas Instruments. It's part of the SIMPLE SWITCHER® family, designed for ease of use and flexibility. The "ADJ" denotes that it is an adjustable version, allowing output voltage customization typically ranging from 1.2V to 37V. The device can deliver up to 3A of continuous output current, making it suitable for a variety of applications requiring moderate power levels.
The LM2673S-ADJ operates at a fixed switching frequency of 260 kHz, which helps reduce the size of external components, enhancing overall design compactness. It features internal frequency compensation and a fixed-frequency PWM architecture, simplifying the design process. Additional features include thermal shutdown, current limiting, and a shutdown mode for power savings.
The device is commonly used in applications such as distributed power systems, battery-powered instruments, and point-of-load converters. Its ease of use, combined with robust features, makes it a versatile choice for designers seeking reliable and efficient voltage regulation solutions.
The LM2673S-ADJ operates at a fixed switching frequency of 260 kHz, which helps reduce the size of external components, enhancing overall design compactness. It features internal frequency compensation and a fixed-frequency PWM architecture, simplifying the design process. Additional features include thermal shutdown, current limiting, and a shutdown mode for power savings.
The device is commonly used in applications such as distributed power systems, battery-powered instruments, and point-of-load converters. Its ease of use, combined with robust features, makes it a versatile choice for designers seeking reliable and efficient voltage regulation solutions.
Equivalent
The LM2673S-ADJ is a step-down voltage regulator. Equivalent products include:
1. MP2307 by MPS – A synchronous buck converter with adjustable output.
2. L78S40 by STMicroelectronics – A switching regulator.
3. LT1765 by Analog Devices – A high-efficiency step-down regulator.
4. TPS54331 by Texas Instruments – A 3-A step-down converter.
5. MC34063A by ON Semiconductor – A versatile DC-DC converter.
Check specifications to ensure compatibility with your application.
1. MP2307 by MPS – A synchronous buck converter with adjustable output.
2. L78S40 by STMicroelectronics – A switching regulator.
3. LT1765 by Analog Devices – A high-efficiency step-down regulator.
4. TPS54331 by Texas Instruments – A 3-A step-down converter.
5. MC34063A by ON Semiconductor – A versatile DC-DC converter.
Check specifications to ensure compatibility with your application.
Features
The LM2673S-ADJ is a step-down voltage regulator known for its efficiency and reliability in DC-DC conversion applications. Key features include:
1. Adjustable Output Voltage: The device supports an adjustable output voltage range, allowing for flexibility in various applications.
2. High Efficiency: It typically operates with high efficiency, often exceeding 90%, helping to reduce power loss.
3. Output Current: Capable of delivering up to 3A of continuous output current.
4. Wide Input Voltage Range: Supports a wide input voltage range, making it suitable for different power supply sources.
5. Switching Frequency: Operates at a fixed switching frequency to balance performance and component size.
6. Thermal Shutdown: Includes over-temperature protection to prevent damage from overheating.
7. Cycle-by-Cycle Current Limiting: Provides internal current limiting for added protection.
8. Simple Design: Requires a minimal number of external components, simplifying the design process.
9. Low Dropout Operation: Allows for efficient operation even with a low input-output voltage differential.
These features make the LM2673S-ADJ ideal for applications in areas like telecommunications, industrial controls, and battery-powered systems.
1. Adjustable Output Voltage: The device supports an adjustable output voltage range, allowing for flexibility in various applications.
2. High Efficiency: It typically operates with high efficiency, often exceeding 90%, helping to reduce power loss.
3. Output Current: Capable of delivering up to 3A of continuous output current.
4. Wide Input Voltage Range: Supports a wide input voltage range, making it suitable for different power supply sources.
5. Switching Frequency: Operates at a fixed switching frequency to balance performance and component size.
6. Thermal Shutdown: Includes over-temperature protection to prevent damage from overheating.
7. Cycle-by-Cycle Current Limiting: Provides internal current limiting for added protection.
8. Simple Design: Requires a minimal number of external components, simplifying the design process.
9. Low Dropout Operation: Allows for efficient operation even with a low input-output voltage differential.
These features make the LM2673S-ADJ ideal for applications in areas like telecommunications, industrial controls, and battery-powered systems.
Pinout
The LM2673S-ADJ is a step-down voltage regulator with an adjustable output, part of the LM267X series by Texas Instruments. It comes in a 5-pin TO-263 surface-mount package. Here are the pin functions:
1. VIN (Pin 1): This is the input voltage pin where the supply voltage is applied. It supports a wide input voltage range.
2. SW (Pin 2): The switch pin, connected to the inductor and diode. It periodically connects to the input voltage to transfer energy to the output.
3. GND (Pin 3): Ground pin, serving as the return path for the input and output currents.
4. FB (Pin 4): Feedback pin, where a voltage divider from the output voltage is connected. It is used to set the output voltage by comparing it to an internal reference.
5. BOOST (Pin 5): This pin is used to improve the efficiency of the internal switching transistor by providing the necessary voltage to keep it fully on during the switching cycle.
These pins collectively allow the LM2673S-ADJ to regulate the output voltage efficiently.
1. VIN (Pin 1): This is the input voltage pin where the supply voltage is applied. It supports a wide input voltage range.
2. SW (Pin 2): The switch pin, connected to the inductor and diode. It periodically connects to the input voltage to transfer energy to the output.
3. GND (Pin 3): Ground pin, serving as the return path for the input and output currents.
4. FB (Pin 4): Feedback pin, where a voltage divider from the output voltage is connected. It is used to set the output voltage by comparing it to an internal reference.
5. BOOST (Pin 5): This pin is used to improve the efficiency of the internal switching transistor by providing the necessary voltage to keep it fully on during the switching cycle.
These pins collectively allow the LM2673S-ADJ to regulate the output voltage efficiently.
Manufacturer
The LM2673S-ADJ is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits. They are one of the largest semiconductor companies in the world and provide a wide range of products for different applications, including analog chips, embedded processors, and digital light processing technology. TI's products are widely used in consumer electronics, automotive systems, industrial equipment, and communications equipment. The company is known for its innovation and has a significant presence in research and development within the semiconductor industry.
Application
The LM2673S-ADJ is a step-down voltage regulator used in a variety of applications. Its primary application areas include power management systems, where it efficiently converts higher DC input voltages to lower DC output voltages. It is commonly used in battery-powered devices, consumer electronics, and industrial power supplies for its high-efficiency performance. Additionally, it is utilized in automotive systems, telecommunications, and distributed power systems due to its ability to provide stable and adjustable output voltages. Its features like thermal shutdown and current limiting make it suitable for applications requiring reliable and robust power solutions.
Package
The LM2673S-ADJ is a step-down voltage regulator from Texas Instruments, and it comes in an "S" package, which refers to the TO-263 surface-mount package type. This package type allows for efficient heat dissipation and is commonly used in high-current, high-efficiency applications.
