LM2576T-3.3G

Product Overview

Category

The LM2576T-3.3G belongs to the category of voltage regulators.

Use

It is commonly used to regulate and control the output voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 3.3V
• Maximum Output Current: 3A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2576T-3.3G comes in a TO-220 package, which provides thermal efficiency and easy mounting on a heat sink.

Essence

This voltage regulator is designed to provide a stable and regulated output voltage for various electronic applications.

Packaging/Quantity

The LM2576T-3.3G is typically available in reels or tubes, with quantities varying based on the manufacturer's packaging specifications.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 3.3V
• Maximum Output Current: 3A
• Line Regulation: ±0.5%
• Load Regulation: ±0.5%
• Dropout Voltage: 1.2V (typical)
• Quiescent Current: 10mA (typical)
• Ripple Rejection Ratio: 75dB (typical)
• Shutdown Current: 80μA (typical)

Detailed Pin Configuration

The LM2576T-3.3G 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): Output voltage pin.

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Built-in thermal shutdown and current limit protection.
• Adjustable output voltage using external resistors.
• Soft-start function prevents excessive inrush current during startup.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with various power sources.
• High efficiency reduces energy wastage and heat generation.
• Compact TO-220 package facilitates easy integration into electronic circuits.
• Built-in protection features enhance reliability and safety.

Disadvantages

• Fixed output voltage limits flexibility in certain applications.
• Requires external components for proper operation.
• Switching frequency may introduce electromagnetic interference in sensitive systems.

Working Principles

The LM2576T-3.3G utilizes a switching regulator topology to regulate the output voltage. It operates by rapidly switching an internal power transistor on and off, controlling the energy flow from the input to the output. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

The LM2576T-3.3G finds extensive use in various electronic applications, including but not limited to:

1. Power supplies for microcontrollers and digital circuits.
2. Battery charging circuits.
3. Automotive electronics.
4. Industrial control systems.
5. LED lighting applications.
6. Portable devices and battery-powered equipment.

Detailed and Complete Alternative Models

1. LM2596S-3.3/NOPB: Similar specifications and functionality, but available in a different package (TO-263).
2. LM317T: Adjustable voltage regulator with similar input voltage range and maximum output current.
3. LT1084CP-3.3: Low dropout voltage regulator with adjustable output voltage and higher maximum output current.

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

In conclusion, the LM2576T-3.3G is a voltage regulator that provides stable and regulated output voltage for various electronic applications. Its wide input voltage range, high efficiency, and built-in protection features make it a versatile choice for power supply designs.