LM2676S-3.3

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LM2676S-3.3

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LM2676 SIMPLE SWITCHER 8V TO 40V

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Especificações

Atributo Valor
Package Bulk
Series SIMPLE SWITCHER®
ProductStatus Active
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Fixed
NumberofOutputs 1
Voltage-Input(Min) 8V
Voltage-Input(Max) 40V
Voltage-Output(Min/Fixed) 3.3V
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

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Description

The LM2676S-3.3 is a step-down voltage regulator designed by Texas Instruments. It is part of the LM2676 series, which provides efficient power conversion with a fixed 3.3V output. This regulator can deliver up to 3A of continuous output current, making it suitable for a variety of applications requiring stable voltage output. It operates with a wide input voltage range, typically from 8V to 40V, allowing flexibility in power supply design.
Key features of the LM2676S-3.3 include high efficiency, typically above 90%, due to its use of a switching mode design, and a simple, easy-to-use architecture that requires minimal external components. This regulator also integrates protection features such as thermal shutdown and current limiting, enhancing reliability and safety in operation. The LM2676S-3.3 is ideal for applications like battery-powered devices, embedded systems, and distributed power systems where a dependable 3.3V supply is needed. Its ease of use and robust performance make it a popular choice among engineers and designers.

Equivalent

The LM2676S-3.3 is a step-down voltage regulator. Equivalent products include:
1. LM2576-3.3: Another step-down regulator from the same family with similar specifications.
2. L4973V3.3: From STMicroelectronics, offering similar functionality.
3. MC34063: A versatile DC-DC converter that can be configured for similar applications.
4. TPS5430: From Texas Instruments, offering 3 A output with adjustable output voltage.
5. MP1584EN: From Monolithic Power Systems, a compact step-down regulator.
Always verify pin compatibility and electrical characteristics before replacing.

Features

The LM2676S-3.3 is a step-down voltage regulator designed for efficient power management. Key features include:
1. Output Voltage: Fixed output voltage of 3.3V.
2. Input Voltage Range: Operates effectively over a wide input voltage range from 8V to 40V.
3. Output Current: Capable of delivering up to 3A continuous output current.
4. Efficiency: High efficiency, typically up to 90%, due to its design and low on-resistance switches.
5. Switching Frequency: Operates at a fixed frequency of 260 kHz, reducing the size of external components.
6. Thermal Protection: Built-in thermal shutdown and current limiting features for safety and reliability.
7. Soft Start: Integrated soft-start function to minimize inrush current during startup.
8. Package: Available in a TO-263 (surface-mount) package.
9. Low Component Count: Requires fewer external components, simplifying circuit design.
Overall, the LM2676S-3.3 is well-suited for applications requiring reliable, efficient step-down voltage conversion with minimal external components and robust protection features.

Pinout

The LM2676S-3.3 is a step-down (buck) voltage regulator capable of delivering high output currents with efficiencies up to 92%. It is designed to provide a fixed output voltage of 3.3V. The chip is housed in a TO-263 package and typically features 5 pins:
1. VIN: Input voltage supply pin. Connects to the input voltage source.
2. GND: Ground pin. Common ground for both input and output voltages.
3. SW: Switch output pin. Connects to the inductor in the buck configuration.
4. FB: Feedback pin. For the fixed output version like the LM2676S-3.3, this pin may be internally connected for feedback.
5. ON/OFF: Enable pin. This pin is used to turn the regulator on or off. A low logic level turns the device off, while a high logic level turns it on.
These pin functions allow the LM2676S-3.3 to efficiently convert a higher input voltage to a stable 3.3V output, suitable for powering various digital circuits and systems.

Manufacturer

The LM2676S-3.3 is manufactured by Texas Instruments Inc. Texas Instruments (TI) is a global semiconductor company that designs and produces a wide range of electronic components, including integrated circuits, analog chips, embedded processors, and digital signal processors. TI is known for its innovations in the semiconductor industry and serves various markets, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company focuses on developing technologies that enable advancements in electronics and improve efficiency and functionality in electronic devices.

Application

The LM2676S-3.3 is a step-down voltage regulator from Texas Instruments, designed for efficient power management. Its application areas include:
1. Embedded Systems: Provides stable 3.3V power for microcontrollers and peripherals.
2. Industrial Automation: Powers sensors and control systems requiring reliable DC voltage.
3. Consumer Electronics: Used in devices like set-top boxes, routers, and modems.
4. Communication Equipment: Supplies regulated power for RF modules and networking devices.
5. Automotive Systems: Used in infotainment systems and vehicle electronics requiring consistent power supply.
Its features like high efficiency and low dropout make it suitable for these applications.

Package

The LM2676S-3.3 is typically available in a TO-263 package, also known as a D2PAK. This is a thermally enhanced, surface-mount package designed for efficient heat dissipation in power applications.

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