LM2574N-5G

Product Overview

Category

The LM2574N-5G belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.75V to 40V
• Output Voltage Range: 1.23V to 37V
• 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-5G comes in a TO-220 package, which provides excellent thermal performance and ease of mounting.

Essence

The essence of LM2574N-5G lies in its ability to efficiently regulate voltage with a wide input voltage range and high output current capability.

Packaging/Quantity

The LM2574N-5G is typically available in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage Range: 1.23V to 37V
• Output Current: Up to 0.5A
• Switching Frequency: 52 kHz
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-220

Detailed Pin Configuration

The LM2574N-5G 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 connected to the inductor.

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Overcurrent protection safeguards the circuit from damage.
• Thermal shutdown prevents overheating.
• Soft-start feature reduces inrush current during startup.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with various power sources.
• High efficiency results in reduced power consumption.
• Compact TO-220 package facilitates easy mounting and heat dissipation.
• Overcurrent protection and thermal shutdown enhance circuit reliability.

Disadvantages

• Limited output current capability (up to 0.5A) may not be suitable for high-power applications.
• Switching frequency of 52 kHz may introduce audible noise in sensitive audio circuits.

Working Principles

The LM2574N-5G is a step-down switching voltage regulator that utilizes a pulse-width modulation (PWM) control scheme. It operates by rapidly switching an internal power transistor on and off to regulate the output voltage. The feedback pin (FB) is used to set the desired output voltage, which is compared to a reference voltage internally. The regulator adjusts the duty cycle of the switching signal to maintain the output voltage within the specified range.

Detailed Application Field Plans

The LM2574N-5G finds applications in various fields, including:

1. Power supply modules for industrial equipment.
2. Battery-powered devices requiring regulated voltage.
3. Automotive electronics, such as car audio systems and lighting controls.
4. Telecommunications equipment, including routers and switches.
5. LED lighting applications.

Detailed and Complete Alternative Models

Some alternative models to the LM2574N-5G include:

1. LM2596: Similar functionality with higher output current capability.
2. LM317: Linear voltage regulator with adjustable output voltage.
3. LT1370: High-efficiency step-down switching regulator with wider input voltage range.

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

Word count: 536 words