規格
| 屬性 | 價值 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | SIMPLE SWITCHER® |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 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 |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
概述
Description
The LM2670SX-ADJ is a versatile, high-efficiency step-down (buck) voltage regulator designed by Texas Instruments. It falls under the Simple Switcher series and is known for its capability to deliver up to 3A of continuous output current with excellent line and load regulation. The "ADJ" designation indicates that it features an adjustable output voltage, allowing users to set the desired voltage level through external resistors. This makes it suitable for a wide range of applications where precise voltage control is required.
Operating with a wide input voltage range of 8V to 40V, the LM2670SX-ADJ is ideal for various power supply solutions, including distributed power systems and battery-powered devices. Its high efficiency, typically above 90%, is achieved through its use of a switching topology, minimizing power loss and heat generation.
Additional features include a cycle-by-cycle current limiting, thermal shutdown for protection, and a frequency of 260 kHz, which helps in using smaller external components. The device is available in a surface-mount TO-263 package, facilitating a compact design.
Operating with a wide input voltage range of 8V to 40V, the LM2670SX-ADJ is ideal for various power supply solutions, including distributed power systems and battery-powered devices. Its high efficiency, typically above 90%, is achieved through its use of a switching topology, minimizing power loss and heat generation.
Additional features include a cycle-by-cycle current limiting, thermal shutdown for protection, and a frequency of 260 kHz, which helps in using smaller external components. The device is available in a surface-mount TO-263 package, facilitating a compact design.
Equivalent
The LM2670SX-ADJ is a step-down voltage regulator. Equivalent products include the LM2596-ADJ, the LM2671-ADJ, and the LM2672-ADJ from Texas Instruments, as well as the MC34063A from ON Semiconductor for similar applications. However, note that electrical characteristics and performance might differ, so it's important to compare specifications like input voltage range, output current, and efficiency to ensure they meet your project requirements.
Features
The LM2670SX-ADJ is a step-down voltage regulator designed for efficient and reliable power management. Key features include:
1. Adjustable Output Voltage: The device offers an adjustable output voltage, providing flexibility for various applications.
2. High Efficiency: It delivers high efficiency up to 92%, reducing heat and power loss.
3. Wide Input Voltage Range: Suitable for a broad range of input voltages, making it versatile for different power sources.
4. High Output Current: Capable of providing up to 3A of continuous output current.
5. Switching Frequency: Features a typical switching frequency of 260 kHz, allowing for smaller external components and reduced board space.
6. Thermal Protection: Includes thermal shutdown protection to prevent damage from overheating.
7. Current Limiting: Has internal current limiting to protect against overcurrent conditions.
8. Low Dropout Voltage: Ensures stable operation even with lower voltages.
9. SOIC Package: Comes in an SOIC package, which is convenient for surface mount applications.
These features make the LM2670SX-ADJ suitable for a variety of applications, including consumer electronics, automotive systems, and industrial equipment.
1. Adjustable Output Voltage: The device offers an adjustable output voltage, providing flexibility for various applications.
2. High Efficiency: It delivers high efficiency up to 92%, reducing heat and power loss.
3. Wide Input Voltage Range: Suitable for a broad range of input voltages, making it versatile for different power sources.
4. High Output Current: Capable of providing up to 3A of continuous output current.
5. Switching Frequency: Features a typical switching frequency of 260 kHz, allowing for smaller external components and reduced board space.
6. Thermal Protection: Includes thermal shutdown protection to prevent damage from overheating.
7. Current Limiting: Has internal current limiting to protect against overcurrent conditions.
8. Low Dropout Voltage: Ensures stable operation even with lower voltages.
9. SOIC Package: Comes in an SOIC package, which is convenient for surface mount applications.
These features make the LM2670SX-ADJ suitable for a variety of applications, including consumer electronics, automotive systems, and industrial equipment.
Pinout
The LM2670SX-ADJ is a step-down voltage regulator with adjustable output. It typically comes in a 5-pin surface-mount TO-263 package. The pin functions are as follows:
1. VIN (Pin 1): This is the input voltage pin where the input supply voltage is connected. It can handle a wide input voltage range, typically up to 40V.
2. SW (Pin 2): This pin is the switch output that connects to the inductor. It is the output of the internal power switch.
3. GND (Pin 3): The ground pin serves as the reference point for the circuit and should be connected to the common ground of the input and output circuits.
4. FB (Pin 4): The feedback pin is used to set the output voltage. A voltage divider network is typically connected between this pin and the output voltage to adjust the output level.
5. ON/OFF (Pin 5): This pin allows for the regulator to be turned on or off. Pulling this pin to a low logic level turns off the regulator, and a high level turns it on.
These pin functions enable the LM2670SX-ADJ to efficiently convert a higher input voltage to a lower, adjustable output voltage.
1. VIN (Pin 1): This is the input voltage pin where the input supply voltage is connected. It can handle a wide input voltage range, typically up to 40V.
2. SW (Pin 2): This pin is the switch output that connects to the inductor. It is the output of the internal power switch.
3. GND (Pin 3): The ground pin serves as the reference point for the circuit and should be connected to the common ground of the input and output circuits.
4. FB (Pin 4): The feedback pin is used to set the output voltage. A voltage divider network is typically connected between this pin and the output voltage to adjust the output level.
5. ON/OFF (Pin 5): This pin allows for the regulator to be turned on or off. Pulling this pin to a low logic level turns off the regulator, and a high level turns it on.
These pin functions enable the LM2670SX-ADJ to efficiently convert a higher input voltage to a lower, adjustable output voltage.
Manufacturer
The LM2670SX-ADJ is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company headquartered in Dallas, Texas. It designs and manufactures semiconductors and various integrated circuits, which are used in electronics around the world. TI is known for its development, innovation, and production of analog chips and embedded processors, and it serves a wide range of industries, including automotive, industrial, personal electronics, and communications equipment. The company is a major player in the semiconductor industry and is recognized for its strong focus on research and development.
Application
The LM2670SX-ADJ is a high-efficiency step-down voltage regulator, suitable for various applications due to its adjustable output voltage. Key application areas include:
1. Power Supply Solutions: Used in generating stable power for microcontrollers, DSPs, and FPGAs.
2. Battery-Powered Devices: Ensures efficient power management in portable electronics.
3. Industrial Equipment: Provides reliable power conversion in automation and control systems.
4. Telecommunications: Supports infrastructure with stable power for RF components.
5. Automotive Electronics: Enables efficient power distribution in infotainment and control modules.
6. Consumer Electronics: Powers devices such as set-top boxes, routers, and gaming consoles.
These applications benefit from its efficiency, adjustable output, and robust design.
1. Power Supply Solutions: Used in generating stable power for microcontrollers, DSPs, and FPGAs.
2. Battery-Powered Devices: Ensures efficient power management in portable electronics.
3. Industrial Equipment: Provides reliable power conversion in automation and control systems.
4. Telecommunications: Supports infrastructure with stable power for RF components.
5. Automotive Electronics: Enables efficient power distribution in infotainment and control modules.
6. Consumer Electronics: Powers devices such as set-top boxes, routers, and gaming consoles.
These applications benefit from its efficiency, adjustable output, and robust design.
Package
The LM2670SX-ADJ is a voltage regulator integrated circuit from Texas Instruments, featuring a TO-263 surface-mount package (also known as D2PAK). It is designed for adjustable output voltage applications and supports efficient step-down (buck) voltage conversion.
