LM2576-12BU TR

Product Overview

Category

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

Use

It is commonly used to regulate and control voltage levels 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 TR comes in a TO-263 package, also known as D2PAK or DDPAK.

Essence

This voltage regulator is designed to provide a stable and regulated 12V output voltage from a wide range of input voltages.

Packaging/Quantity

The LM2576-12BU 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
• Dropout Voltage: 1.2V (typical)
• Line Regulation: ±0.5% (typical)
• Load Regulation: ±0.5% (typical)
• Ripple Rejection: 75 dB (typical)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2576-12BU TR has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. FB (Feedback)
4. VOUT (Output Voltage)

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Built-in over-temperature and over-current protection.
• Adjustable output voltage with external resistors.
• Soft-start function prevents excessive inrush current.

Advantages

• Compact and easy-to-use package.
• Wide input voltage range allows for flexibility in various applications.
• High efficiency reduces power dissipation.
• Built-in protection features enhance reliability.
• Adjustable output voltage provides customization options.

Disadvantages

• Switching regulators may introduce some noise in sensitive applications.
• Requires additional external components for proper operation.
• Higher cost compared to linear regulators.

Working Principles

The LM2576-12BU TR is a step-down switching regulator that utilizes pulse-width modulation (PWM) to regulate the output voltage. It operates by rapidly switching an internal power transistor on and off, controlling the energy transfer from the input to the output. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

The LM2576-12BU TR can be used in various applications, including but not limited to:

1. Power supplies for industrial equipment
2. Automotive electronics
3. Battery charging circuits
4. LED lighting systems
5. Telecom and networking devices
6. Audio amplifiers

Detailed and Complete Alternative Models

1. LM2596-12V: Similar to LM2576-12BU TR, but with adjustable output voltage.
2. LM317: Linear voltage regulator with adjustable output voltage.
3. LT1084: High-current linear voltage regulator with fixed output voltage.

These alternative models offer different features and specifications, providing options based on specific application requirements.

In conclusion, the LM2576-12BU TR is a versatile voltage regulator that offers stable and efficient voltage regulation. Its wide input voltage range, compact package, and built-in protection features make it suitable for various electronic applications. However, it is important to consider the potential noise and additional external components required when using switching regulators.