LM2676S-ADJ/NOPB

Product Overview

Category: Voltage Regulator
Use: Power Management
Characteristics: Adjustable Output, High Efficiency
Package: TO-263-7 (D2PAK)
Essence: Step-Down Switching Regulator
Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 8V to 40V
• Output Voltage Range: 1.2V to 37V
• Output Current: Up to 3A
• Switching Frequency: 260kHz
• Efficiency: Up to 92%
• Dropout Voltage: 1.2V at 3A
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2676S-ADJ/NOPB has the following pin configuration:

___________ | | IN |1 7| SW | | FB |2 6| GND | | EN |3 5| VOUT |___________|

Functional Features

• Adjustable output voltage through external resistors
• High efficiency due to synchronous rectification
• Integrated thermal shutdown and current limit protection
• Wide input voltage range for versatile applications
• Low dropout voltage for improved efficiency

Advantages

• Compact TO-263-7 package allows for easy integration
• High efficiency reduces power dissipation and improves battery life
• Adjustable output voltage provides flexibility for various applications
• Built-in protection features enhance reliability and safety
• Wide input voltage range accommodates different power sources

Disadvantages

• Requires external components for proper operation
• Sensitive to input voltage fluctuations
• Limited output current compared to some other regulators
• Higher cost compared to linear regulators

Working Principles

The LM2676S-ADJ/NOPB is a step-down switching regulator that converts a higher input voltage into a lower output voltage. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal power MOSFET switches on and off at a high frequency, allowing for efficient energy transfer from the input to the output.

The adjustable output voltage is achieved by connecting external resistors to the feedback pin (FB). By selecting appropriate resistor values, the desired output voltage can be set within the specified range.

Detailed Application Field Plans

The LM2676S-ADJ/NOPB is commonly used in various applications where efficient voltage regulation is required. Some of the typical application fields include:

1. Power supplies for industrial equipment
2. Automotive electronics
3. Battery-powered devices
4. Distributed power systems
5. Telecom infrastructure
6. LED lighting

Detailed and Complete Alternative Models

• LM2676S-12/NOPB: Fixed 12V output voltage version
• LM2676S-ADJ/CT: Ceramic package variant for improved thermal performance
• LM2676S-ADJ/LB03: Low dropout voltage variant for enhanced efficiency

These alternative models offer different output voltage options or specific features to cater to diverse application requirements.

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