LM2575-3.3BWM

Product Overview

Category

The LM2575-3.3BWM belongs to the category of voltage regulators.

Use

This product is commonly used in electronic circuits to regulate and stabilize voltage levels.

Characteristics

• Input Voltage Range: 4V to 40V
• Output Voltage: 3.3V
• Maximum Output Current: 1A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2575-3.3BWM comes in a TO-263-7 package, also known as D²PAK or DDPAK.

Essence

The essence of the LM2575-3.3BWM is its ability to efficiently convert higher input voltages into a stable 3.3V output voltage.

Packaging/Quantity

This product is typically available in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4V to 40V
• Output Voltage: 3.3V
• Output Current: Up to 1A
• Dropout Voltage: 1.2V (typical)
• Line Regulation: ±0.5% (typical)
• Load Regulation: ±0.5% (typical)
• Quiescent Current: 10mA (typical)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2575-3.3BWM 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 during voltage conversion.
• Internal thermal shutdown and current limit protection enhance reliability.
• Adjustable output voltage through external resistors.
• Low quiescent current enables energy-efficient operation.

Advantages

• Compact size and easy integration into various electronic circuits.
• Wide input voltage range accommodates different power supply sources.
• Efficient voltage regulation minimizes heat dissipation and power wastage.
• Robust protection features ensure safe and reliable operation.
• Adjustable output voltage provides flexibility for different applications.

Disadvantages

• The switching frequency may introduce electromagnetic interference in sensitive applications.
• Requires additional external components for proper operation.
• Limited maximum output current may not be suitable for high-power applications.

Working Principles

The LM2575-3.3BWM utilizes a switching regulator topology to convert the input voltage to the desired output voltage. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal oscillator generates a fixed frequency signal, which controls the duty cycle of the switch. By adjusting the duty cycle, the output voltage is regulated. The feedback pin monitors the output voltage and adjusts the duty cycle accordingly to maintain a stable 3.3V output.

Detailed Application Field Plans

The LM2575-3.3BWM finds applications in various fields, including:

1. Power supply modules for microcontrollers and digital circuits.
2. Battery-powered devices requiring a stable 3.3V voltage source.
3. Automotive electronics, such as dashboard displays and infotainment systems.
4. Industrial automation systems and control circuits.
5. LED lighting applications.
6. Portable electronic devices, such as smartphones and tablets.

Detailed and Complete Alternative Models

1. LM2574-3.3: Similar to LM2575-3.3BWM but with a different package (TO-220).
2. LM2596-3.3: Buck converter with adjustable output voltage and higher maximum output current.
3. LM317T: Linear voltage regulator with adjustable output voltage but lower efficiency.

These alternative models offer similar functionality and can be considered as substitutes for the LM2575-3.3BWM in specific applications.

In conclusion, the LM2575-3.3BWM is a voltage regulator that efficiently converts higher input voltages to a stable 3.3V output. Its wide input voltage range, high efficiency, and robust protection features make it suitable for various electronic applications. However, its limited maximum output current and potential electromagnetic interference should be considered when selecting this product for specific projects.