規格
| 屬性 | 價值 |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| Series | SIMPLE SWITCHER® |
| ProductStatus | Obsolete |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Adjustable |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 4V |
| Voltage-Input(Max) | 40V |
| Voltage-Output(Min/Fixed) | 1.23V |
| Voltage-Output(Max) | 37V |
| Current-Output | 500mA |
| Frequency-Switching | 52kHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 14-SOIC (0.295, 7.50mm Width) |
概述
Description
The LM2574MX-ADJ is a versatile step-down (buck) switching voltage regulator from Texas Instruments. It is designed to provide a simple and efficient solution for reducing voltage levels in various electronic applications. This adjustable version allows the output voltage to be set anywhere between 1.23V and 37V when powered by an input voltage range of 4.75V to 40V, making it suitable for a wide range of applications.
The LM2574MX-ADJ operates at a fixed switching frequency of 52 kHz, which helps minimize the size of external components and simplifies the design process. It can deliver an output current of up to 500mA, making it ideal for medium-load applications. The device includes features such as thermal shutdown and current limiting for enhanced reliability and protection.
Its TO-263 surface-mount package facilitates easy integration into compact circuit designs. The LM2574MX-ADJ is used in various applications, including power supply systems for microcontrollers, battery chargers, and distributed power systems, due to its efficiency, flexibility, and reliability.
The LM2574MX-ADJ operates at a fixed switching frequency of 52 kHz, which helps minimize the size of external components and simplifies the design process. It can deliver an output current of up to 500mA, making it ideal for medium-load applications. The device includes features such as thermal shutdown and current limiting for enhanced reliability and protection.
Its TO-263 surface-mount package facilitates easy integration into compact circuit designs. The LM2574MX-ADJ is used in various applications, including power supply systems for microcontrollers, battery chargers, and distributed power systems, due to its efficiency, flexibility, and reliability.
Equivalent
The LM2574MX-ADJ is a step-down voltage regulator. Equivalent products include:
1. LM2594-ADJ: Similar functionality with higher current capacity.
2. MC34063: Lower current, but can be configured as a step-down converter.
3. TS2596: A drop-in replacement with similar specifications.
4. L4973V5.1: Another adjustable voltage regulator with similar function.
Always verify pin compatibility and electrical specifications before substituting.
1. LM2594-ADJ: Similar functionality with higher current capacity.
2. MC34063: Lower current, but can be configured as a step-down converter.
3. TS2596: A drop-in replacement with similar specifications.
4. L4973V5.1: Another adjustable voltage regulator with similar function.
Always verify pin compatibility and electrical specifications before substituting.
Features
The LM2574MX-ADJ is a monolithic integrated circuit that functions as a step-down (buck) voltage regulator. It features an adjustable output voltage, which can be set using an external resistor divider. The device is designed to operate at a fixed switching frequency of 52 kHz, ensuring minimal external components and a straightforward circuit design. It can deliver up to 0.5A of load current with high efficiency.
Key features include:
- Wide input voltage range from 4V to 40V.
- Adjustable output voltage from 1.23V to 37V.
- Output voltage tolerance of ±4% over line, load, and temperature.
- Integrated thermal shutdown and current limit protection.
- Requires few external components, simplifying the design.
- On-chip frequency compensation and soft-start.
- Capable of up to 88% efficiency.
- Standard 8-lead SOIC package for easy implementation in designs.
These features make the LM2574MX-ADJ suitable for a variety of applications, including power management in battery-powered devices, distributed power systems, and various other electronic circuits requiring efficient down-conversion of voltage.
Key features include:
- Wide input voltage range from 4V to 40V.
- Adjustable output voltage from 1.23V to 37V.
- Output voltage tolerance of ±4% over line, load, and temperature.
- Integrated thermal shutdown and current limit protection.
- Requires few external components, simplifying the design.
- On-chip frequency compensation and soft-start.
- Capable of up to 88% efficiency.
- Standard 8-lead SOIC package for easy implementation in designs.
These features make the LM2574MX-ADJ suitable for a variety of applications, including power management in battery-powered devices, distributed power systems, and various other electronic circuits requiring efficient down-conversion of voltage.
Pinout
The LM2574MX-ADJ is a step-down (buck) voltage regulator with an adjustable output. It typically comes in an 8-pin surface-mount (SOIC-8) package. The pin functions are as follows:
1. VIN (Pin 1): Input voltage.
2. VSW (Pin 2): Switch output, connected to the inductor.
3. Ground (Pin 3): Ground reference for the circuit.
4. Feedback (Pin 4): Used to set the output voltage via a resistor divider network.
5. ON/OFF (Pin 5): Allows the regulator to be turned on or off.
6. NC (Pins 6, 7): No connection, generally not internally connected.
7. VOUT (Pin 8): Output voltage, typically not present in some adjustable variants.
The device is primarily used for applications requiring adjustable output voltages with a high level of efficiency.
1. VIN (Pin 1): Input voltage.
2. VSW (Pin 2): Switch output, connected to the inductor.
3. Ground (Pin 3): Ground reference for the circuit.
4. Feedback (Pin 4): Used to set the output voltage via a resistor divider network.
5. ON/OFF (Pin 5): Allows the regulator to be turned on or off.
6. NC (Pins 6, 7): No connection, generally not internally connected.
7. VOUT (Pin 8): Output voltage, typically not present in some adjustable variants.
The device is primarily used for applications requiring adjustable output voltages with a high level of efficiency.
Manufacturer
The LM2574MX-ADJ is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of integrated circuits and electronic components. The company is known for its innovation in analog and embedded processing technologies, which are used in various applications across industries such as automotive, industrial, consumer electronics, and communications. TI's products are integral to the development of electronics that improve efficiency and performance in a variety of fields.
Application
The LM2574MX-ADJ is a versatile adjustable voltage regulator commonly used in various applications such as:
1. Power Supply Solutions: Ideal for step-down (buck) converter applications to efficiently convert higher DC voltage to a lower DC voltage.
2. Battery Chargers: Used in designing battery charging circuits for different types of batteries.
3. Embedded Systems: Provides regulated power for microcontrollers and other digital components.
4. Industrial Automation: Supports power management in industrial control systems and automation equipment.
5. Consumer Electronics: Supplies power to devices like routers, modems, and other small to medium-sized electronics.
6. Automotive Electronics: Used in automotive power distribution systems for various electronic modules.
These applications benefit from the LM2574MX-ADJ’s high efficiency, reliability, and ease of use.
1. Power Supply Solutions: Ideal for step-down (buck) converter applications to efficiently convert higher DC voltage to a lower DC voltage.
2. Battery Chargers: Used in designing battery charging circuits for different types of batteries.
3. Embedded Systems: Provides regulated power for microcontrollers and other digital components.
4. Industrial Automation: Supports power management in industrial control systems and automation equipment.
5. Consumer Electronics: Supplies power to devices like routers, modems, and other small to medium-sized electronics.
6. Automotive Electronics: Used in automotive power distribution systems for various electronic modules.
These applications benefit from the LM2574MX-ADJ’s high efficiency, reliability, and ease of use.
Package
The LM2574MX-ADJ is typically available in a surface-mount package known as the SOIC-8 (Small Outline Integrated Circuit with 8 pins).
