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LM2676S-ADJ

Name: LM2676S-ADJ
Rating: 4.8 (15 reviews)

+物料清單

IC REG BUCK ADJ 3A TO263

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製造商部分 #LM2676S-ADJ
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正品保證

規格

屬性	價值
Series	SIMPLE SWITCHER®
Part Status	Obsolete
Base Product Number	LM2676
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
Package	TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
Supplier Device Package	TO-263 (DDPAK-7)
Packaging	Tube

概述

Description

The LM2676S-ADJ is a step-down voltage regulator from Texas Instruments, designed to efficiently convert a higher input voltage to a lower output voltage. It features a built-in, high-efficiency switch and is capable of delivering up to 3A of output current. The "ADJ" in its name indicates that it has an adjustable output voltage, allowing users to set the desired voltage level using external resistors.
Key features include a wide input voltage range, typically from 8V to 40V, and an adjustable output voltage range from 1.2V to 37V, which makes it suitable for a wide variety of applications. It also incorporates a fixed, high-frequency switching (260 kHz), leading to smaller external components and a more compact overall design.
Furthermore, the LM2676S-ADJ includes additional features such as thermal shutdown and current limiting to enhance system reliability. Its efficient design and robust performance make it a popular choice for powering microcontrollers, communication devices, and other electronics requiring a stable power source.

Equivalent

The LM2676S-ADJ is a step-down (buck) voltage regulator. Equivalent products include:
1. LM2596-ADJ from Texas Instruments - another popular adjustable voltage regulator.
2. L78S05CV from STMicroelectronics - although fixed, it can be used with additional components for adjustability.
3. MC34063 from ON Semiconductor - a versatile DC-DC converter.
4. LT1074 from Analog Devices - similar functionality with higher efficiency.
Ensure compatibility with your specific requirements before substitution.

Features

The LM2676S-ADJ is a step-down voltage regulator from Texas Instruments, designed for efficient DC-DC conversion. Key features include:
1. Adjustable Output Voltage: Allows output voltage customization via external resistors.
2. High Efficiency: Operates at up to 92% efficiency, minimizing heat generation.
3. Current Capability: Delivers up to 3A output current.
4. Wide Input Voltage Range: Supports input voltages from 8V to 40V.
5. Fixed Switching Frequency: Operates at 260 kHz, aiding in smaller external component sizing.
6. Low Shutdown Current: Draws only 50 µA in shutdown mode, conserving energy.
7. Overcurrent Protection: Features in-built overcurrent protection to prevent damage.
8. Thermal Shutdown: Protects the device by shutting down in case of overheating.
9. Soft Start: Reduces inrush current during start-up to protect components.
10. Minimal External Components: Simplifies design with fewer external components required.
These features make the LM2676S-ADJ suitable for applications requiring a reliable, efficient, and adjustable power supply solution.

Pinout

The LM2676S-ADJ is a 5-pin package, high-efficiency step-down voltage regulator. Its pin functions are as follows:
1. Vin (Pin 1): Input voltage pin where the unregulated voltage supply is connected.
2. SW (Pin 2): Switch output that connects to the inductor.
3. Ground (GND, Pin 3): Common ground for input and output.
4. Feedback (FB, Pin 4): Used to adjust the output voltage by connecting it to a resistor divider network.
5. ON/OFF (Pin 5): Enables or disables the regulator. When connected to ground, the device is enabled; when connected to a high voltage, the device is disabled.
The LM2676S-ADJ is specifically designed to provide efficient power conversion with an adjustable output voltage, making it suitable for various power supply applications.

Manufacturer

The LM2676S-ADJ is manufactured by Texas Instruments Incorporated (TI). Texas Instruments is a global semiconductor design and manufacturing company. It is one of the largest semiconductor companies in the world, specializing in the development of analog chips and embedded processors, which are critical components in various electronic devices. The company serves a wide array of industries including automotive, industrial, personal electronics, communications equipment, and enterprise systems. TI is known for its innovation in producing high-quality semiconductors that are integral to the operation of modern electronic systems. The LM2676S-ADJ is a voltage regulator, part of TI's extensive product lineup that supports efficient power management solutions.

Application

The LM2676S-ADJ is a step-down DC-DC converter designed for efficient power management. Its primary application areas include:
1. Power Supply Solutions: Used in designing efficient power supplies for various electronic devices requiring adjustable output voltage.
2. Telecommunications: Supports power regulation in telecom equipment.
3. Industrial Automation: Provides stable voltage for industrial control systems.
4. Consumer Electronics: Powers devices like TVs, monitors, and audio equipment.
5. Automotive Systems: Utilized in automotive electronics for power regulation.
6. Embedded Systems: Supports microcontrollers and other components in embedded applications.
Its versatility and efficiency make it suitable for both commercial and industrial applications.

Package

The LM2676S-ADJ is typically available in a TO-263 package type. This package is a surface-mount, 7-pin configuration known for efficient heat dissipation, suitable for high-current applications like the adjustable voltage regulator that the LM2676S-ADJ represents.

Frequently Asked Questions

Q: What is the input voltage range for the LM2676S-ADJ?
A: The device operates with an input voltage from 8V to 40V, making it suitable for a wide range of power supplies.

Q: Can the output voltage be set to any value?
A: Yes, it is adjustable from a minimum of 1.2V up to a maximum of 37V using external feedback resistors.

Q: What is the maximum output current this regulator can provide?
A: It can deliver a continuous output current of up to 3A, ideal for moderate-load applications.

Q: Does this device require an external synchronous rectifier?
A: No, it does not. The LM2676S-ADJ uses a non-synchronous buck topology, simplifying design.

Q: What is the typical switching frequency of this IC?
A: The switching frequency is fixed at 260 kHz, balancing efficiency and component size.

Q: Is this part recommended for new designs?
A: No, the part status is "Obsolete." Consider newer SIMPLE SWITCHER® alternatives for new projects.

Q: What package options are available for this component?
A: It is offered in a TO-263 (DDPAK-7) surface-mount package, which provides good thermal performance.