LM2576-12WU-TR

Product Overview

Category

The LM2576-12WU-TR belongs to the category of voltage regulators.

Use

It is primarily used for converting higher voltage inputs into regulated lower voltage outputs.

Characteristics

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 3A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2576-12WU-TR comes in a TO-263-7 package, also known as D²PAK/TO-263.

Essence

The essence of LM2576-12WU-TR lies in its ability to efficiently regulate voltage while handling high input voltages and delivering stable output currents.

Packaging/Quantity

The LM2576-12WU-TR is typically packaged in reels containing 250 units.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 3A
• Switching Frequency: 52 kHz
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-263-7 (D²PAK/TO-263)

Detailed Pin Configuration

The LM2576-12WU-TR 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 regulating the output voltage
4. VOUT (Pin 4): Regulated output voltage pin
5. SW (Pin 5): Switching pin for controlling the internal power switch
6. NC (Pin 6): No connection pin
7. EN (Pin 7): Enable pin for turning the regulator on/off

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss during voltage conversion.
• Overcurrent and thermal protection safeguards the device and connected components.
• Adjustable output voltage through external resistors.
• Built-in soft-start function prevents excessive inrush current.

Advantages and Disadvantages

Advantages

• Efficient voltage regulation with high output current capability.
• Wide input voltage range enables compatibility with various power sources.
• Compact TO-263-7 package facilitates easy integration into designs.
• Built-in protection features enhance reliability and safety.

Disadvantages

• Requires external components for proper operation.
• Higher switching frequency may introduce additional noise in sensitive applications.

Working Principles

The LM2576-12WU-TR is a step-down switching voltage regulator that utilizes a buck converter topology. It operates by rapidly switching an internal power switch to control the energy transfer from the input to the output. This switching action, along with the use of an inductor and capacitors, allows for efficient voltage conversion while maintaining a stable output.

Detailed Application Field Plans

The LM2576-12WU-TR finds applications in various fields, including:

1. Power supply modules for industrial equipment.
2. Automotive electronics, such as car audio systems and LED lighting.
3. Battery charging circuits for portable devices.
4. Distributed power systems in telecommunications.
5. Solar-powered systems requiring regulated voltage outputs.

Detailed and Complete Alternative Models

Some alternative models to the LM2576-12WU-TR include:

1. LM2596-12WU-TR: Similar specifications but with adjustable output voltage.
2. LM2575-12WU-TR: Lower output current capability but with a wider input voltage range.
3. LM2678-12WU-TR: Higher efficiency and lower dropout voltage, suitable for battery-powered applications.

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