LM2674M-5.0

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Step-down switching regulator - Fixed output voltage of 5.0V - High efficiency - Wide input voltage range - Low standby current - Thermal shutdown protection

Package: SOIC-8

Essence: The LM2674M-5.0 is a step-down switching regulator IC that provides a fixed output voltage of 5.0V. It is designed to efficiently convert higher input voltages into lower output voltages, making it suitable for various applications.

Packaging/Quantity: The LM2674M-5.0 is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 8V to 40V
• Output Voltage: 5.0V
• Output Current: Up to 1A
• Switching Frequency: 260kHz
• Efficiency: Up to 92%
• Standby Current: 50µA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2674M-5.0 has eight pins arranged as follows:

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| | --| VIN GND |-- Pin 1: Input Voltage (VIN) --| SW FB |-- Pin 2: Switching Node (SW) --| VOUT NC |-- Pin 3: Output Voltage (VOUT) --| PGND NC |-- Pin 4: Power Ground (PGND) --| SS NC |-- Pin 5: Soft Start (SS) --| EN NC |-- Pin 6: Enable (EN) --| NC NC |-- Pin 7: No Connection (NC) --| VCC NC |-- Pin 8: Supply Voltage (VCC) |___________| ```

Functional Features

1. Step-Down Conversion: The LM2674M-5.0 efficiently steps down higher input voltages to a fixed 5.0V output voltage.

2. High Efficiency: With an efficiency of up to 92%, the LM2674M-5.0 minimizes power losses and maximizes energy conversion.

3. Wide Input Voltage Range: It can accept input voltages ranging from 8V to 40V, making it suitable for various power supply applications.

4. Low Standby Current: The LM2674M-5.0 has a low standby current of only 50µA, reducing power consumption during idle periods.

5. Thermal Shutdown Protection: To prevent overheating, the IC incorporates thermal shutdown protection, ensuring safe operation under high temperature conditions.

Advantages and Disadvantages

Advantages: - Efficient step-down voltage conversion - Wide input voltage range - Low standby current consumption - Thermal shutdown protection for safety - Compact SOIC package for easy integration

Disadvantages: - Fixed output voltage may not be suitable for all applications requiring variable voltage levels - Limited output current capacity (up to 1A)

Working Principles

The LM2674M-5.0 utilizes a switching regulator topology to convert higher input voltages into a stable 5.0V output. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage. By rapidly switching the internal power MOSFET, it controls the energy transfer from the input to the output, achieving efficient voltage conversion.

Detailed Application Field Plans

The LM2674M-5.0 can be used in various applications, including but not limited to: 1. Power supplies for microcontrollers and digital circuits 2. Battery charging systems 3. Automotive electronics 4. Industrial control systems 5. LED lighting applications

Detailed and Complete Alternative Models

1. LM2674M-ADJ: Adjustable output voltage version of LM2674M series.
2. LM2674MX-5.0: Surface mount package variant of LM2674M-5.0.
3. LM2674M-12: Fixed 12V output voltage variant.

These alternative models offer different output voltages or package options to suit specific requirements.

In conclusion, the LM2674M-5.0 is a step-down switching regulator IC that efficiently converts higher input voltages into a fixed 5.0V output. With its wide input voltage range, high efficiency, and compact package, it finds applications in various fields such as microcontroller power supplies, battery chargers, automotive electronics, industrial control systems, and LED lighting. While it has advantages like efficient conversion and low standby current, its fixed output voltage and limited