LM2576-12BU

Product Overview

Category

The LM2576-12BU 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 3A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2576-12BU comes in a TO-263 package, also known as D2PAK.

Essence

The essence of the LM2576-12BU is its ability to efficiently regulate voltage with high output current capability.

Packaging/Quantity

The LM2576-12BU is typically packaged in reels or tubes and is available in quantities of 2500 units per reel or tube.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 3A
• Dropout Voltage: 1.2V (typical)
• Line Regulation: ±0.5% (typical)
• Load Regulation: ±0.5% (typical)
• Switching Frequency: 52 kHz
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-263 (D2PAK)

Detailed Pin Configuration

The LM2576-12BU has the following pin configuration:

• Pin 1 (VIN): Input voltage pin
• Pin 2 (GND): Ground pin
• Pin 3 (FB): Feedback pin
• Pin 4 (SW): Switching pin
• Pin 5 (VOUT): Output voltage pin

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Overcurrent protection safeguards the circuit from excessive current.
• Thermal shutdown protection prevents overheating.
• Adjustable output voltage provides flexibility in design.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with various power sources.
• High efficiency reduces power dissipation and improves overall system performance.
• Overcurrent and thermal shutdown protections enhance reliability and safety.
• Adjustable output voltage allows for customization based on specific requirements.

Disadvantages

• The TO-263 package may require additional space compared to smaller packages.
• The switching frequency of 52 kHz may introduce noise in sensitive applications.

Working Principles

The LM2576-12BU is a step-down (buck) voltage regulator that utilizes a switching converter topology. It operates by rapidly switching an internal transistor on and off to regulate the output voltage. This switching action allows for efficient conversion of higher input voltages to a lower, regulated output voltage.

Detailed Application Field Plans

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

1. Power supply circuits for electronic devices.
2. Battery charging circuits.
3. Automotive electronics.
4. Industrial control systems.
5. LED lighting applications.
6. Telecommunications equipment.

Detailed and Complete Alternative Models

Some alternative models to the LM2576-12BU include:

1. LM2596-12V: Similar functionality with adjustable output voltage.
2. LM317T: Linear voltage regulator with adjustable output voltage.
3. XL4016E1: Step-down voltage regulator with higher output current capability.
4. MP1584EN: Step-down voltage regulator with adjustable output voltage.

These alternative models offer similar features and can be considered based on specific application requirements.

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