LM2574N-12G

Product Overview

Category

The LM2574N-12G belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 0.5A
• Efficiency: Up to 90%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2574N-12G comes in a TO-220 package, which provides excellent thermal performance and ease of mounting.

Essence

The essence of LM2574N-12G lies in its ability to efficiently regulate voltage while maintaining a compact form factor.

Packaging/Quantity

The LM2574N-12G is typically available in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 0.5A
• Quiescent Current: 8mA
• Switching Frequency: 52 kHz
• Duty Cycle: Up to 90%
• Ripple Rejection: 70dB
• Shutdown Current: 80μA
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2574N-12G has the following pin configuration:

1. VIN (Pin 1): Input voltage pin.
2. GND (Pin 2): Ground reference pin.
3. FB (Pin 3): Feedback pin for setting the output voltage.
4. SW (Pin 4): Switching pin for controlling the output voltage.

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Thermal shutdown protection prevents overheating.
• Short circuit protection safeguards against damage.
• Compact form factor enables easy integration into various circuits.

Advantages and Disadvantages

Advantages

• Wide input voltage range provides flexibility in design.
• High efficiency reduces power consumption.
• Thermal shutdown and short circuit protection enhance reliability.
• Compact package facilitates easy mounting.

Disadvantages

• Limited output current capacity (up to 0.5A).
• Higher quiescent current compared to some alternatives.

Working Principles

The LM2574N-12G is a step-down switching regulator that utilizes pulse-width modulation (PWM) to regulate the output voltage. It operates by rapidly switching the internal power transistor on and off, controlling the duty cycle to maintain the desired output voltage. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

The LM2574N-12G finds applications in various fields, including:

1. Power supply modules for industrial equipment.
2. Battery-powered systems requiring regulated voltage.
3. Automotive electronics, such as car audio systems.
4. LED lighting applications.
5. Portable electronic devices, like smartphones and tablets.

Detailed and Complete Alternative Models

1. LM2596S-12: Similar to LM2574N-12G, but with higher output current capacity (up to 3A).
2. LM317T: Linear voltage regulator with adjustable output voltage.
3. LT1084CP-12: Low dropout linear regulator with fixed 12V output.

These alternative models offer different features and specifications, allowing designers to choose the most suitable option based on their specific requirements.

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