LM2676SX-5.0

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LM2676SX-5.0

LM2676 SIMPLE SWITCHER 8V TO 40V

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概述

Description

The LM2676SX-5.0 is a step-down (buck) voltage regulator from Texas Instruments, designed for efficient power conversion in electronic circuits. It is part of the LM2676 series, known for providing high-efficiency and reliable performance in applications requiring a fixed 5.0V output. This regulator can deliver up to 3A of continuous output current, making it suitable for medium-power applications.
Key features include a wide input voltage range from 8V to 40V, making it versatile for various power supply sources. It operates at a fixed frequency of 260 kHz, which helps in minimizing component size while maintaining efficiency. The device features a built-in thermal shutdown, current limiting, and an ON/OFF control, providing protection and flexibility for power management.
The LM2676SX-5.0 also offers a low dropout voltage and high efficiency, reducing heat dissipation and improving overall system performance. Its TO-263 surface-mount package facilitates easy integration into circuit boards. Typical applications include battery-powered devices, distributed power systems, and other electronics requiring efficient voltage regulation.

Features

The LM2676SX-5.0 is a step-down voltage regulator with the following key features:
1. Output Voltage: Provides a fixed 5.0V output voltage.
2. Input Voltage Range: Operates efficiently within a wide input voltage range.
3. Output Current: Capable of delivering up to 3A continuous output current.
4. Efficiency: High efficiency, typically over 90%, minimizing heat generation.
5. Switching Frequency: Fixed frequency of 260 kHz for optimized performance.
6. Thermal Shutdown: Integrated thermal shutdown protection to prevent overheating.
7. Cycle-by-Cycle Current Limiting: Protects the device by limiting current during each cycle.
8. Low Dropout: Ensures operation even at low differential voltages.
9. Soft-Start Capability: Reduces inrush current during startup.
10. Output Voltage Precision: Ensures stable and precise output voltage with minimal deviation.
11. Package: Available in TO-263 (surface-mount) package for compact design.
12. Application: Suitable for a wide range of applications including telecommunications, computing, and consumer electronics.
These features make the LM2676SX-5.0 a reliable choice for applications requiring a stable and efficient power supply solution.

Package

The LM2676SX-5.0 is a step-down voltage regulator available in a TO-263 surface-mount package. This package type is designed for efficient heat dissipation and is commonly used in power management applications where space is limited.

Pinout

The LM2676SX-5.0 is a step-down voltage regulator IC with a pin count of 7. It is designed to provide a fixed output voltage of 5.0 volts. The pin functions are as follows:
1. VIN: Input voltage supply pin. This is where the input voltage is applied to power the device.
2. SW: Switch pin. This is connected to the inductor and serves as the output of the internal switching regulator.
3. GND: Ground pin. This is the reference point for the input and output voltages.
4. FB (Feedback): This pin is used to monitor the output voltage for regulation. However, in the fixed voltage version like the LM2676SX-5.0, it is internally set for a fixed output.
5. ON/OFF: Enable pin. This pin can be used to enable or disable the device. When pulled low, the regulator is turned off.
6. Boost: This pin is connected to an external capacitor to improve efficiency during low voltage conditions.
7. VOUT (Output): The regulated output voltage is available at this pin.
This IC is suitable for applications requiring a high-efficiency, fixed 5.0V output with a current capability of up to 3A.

Manufacturer

The LM2676SX-5.0 is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components, including analog and embedded processing products. The company is known for its innovations in semiconductor technology and caters to various industries such as automotive, industrial, personal electronics, communications, and enterprise systems. Texas Instruments focuses on developing products that help engineers design efficient and effective electronic systems.

Application

The LM2676SX-5.0 is a step-down voltage regulator used in applications requiring efficient power conversion and output voltage regulation. Its typical application areas include powering microcontrollers and digital circuits, battery-powered devices, industrial power supplies, and communications equipment. It is suitable for systems requiring a stable 5V output from a higher input voltage, such as 12V or 24V systems. The regulator's high efficiency and low dropout characteristics make it ideal for portable and compact devices.

Equivalent

The LM2676SX-5.0 is a step-down voltage regulator. Equivalent products include the LM2676T-5.0 from Texas Instruments, as well as similar specs from other manufacturers like the AP1509-50 from Diodes Incorporated and the MC34063A from ON Semiconductor. Ensure pin compatibility and check the datasheets for exact specifications and application compatibility before using a substitute.

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