LM2575-3.3WU-TR

Product Overview

Category

The LM2575-3.3WU-TR 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: 4.75V to 40V
• Output Voltage: 3.3V
• Output Current: Up to 1A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2575-3.3WU-TR comes in a TO-263-7 package, which provides excellent thermal performance and ease of mounting.

Essence

The essence of the LM2575-3.3WU-TR lies in its ability to efficiently convert higher input voltages into a stable 3.3V output, making it suitable for various applications.

Packaging/Quantity

This product is typically available in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 3.3V ±4%
• 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 LM2575-3.3WU-TR has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. FB (Feedback)
4. VOUT (Output Voltage)
5. ON/OFF (Enable/Disable)
6. NC (No Connection)
7. NC (No Connection)

Functional Features

• Wide input voltage range allows for flexibility in various applications.
• High efficiency ensures minimal power loss during voltage conversion.
• Overcurrent and thermal protection safeguards the circuit and the LM2575-3.3WU-TR itself.
• Enable/disable pin provides control over the output voltage.

Advantages

• Compact TO-263-7 package offers excellent thermal performance.
• High efficiency results in reduced power dissipation.
• Wide operating temperature range enables usage in extreme environments.
• Overcurrent and thermal protection enhance reliability.

Disadvantages

• Limited output current of up to 1A may not be sufficient for certain high-power applications.
• The switching frequency of 52 kHz may introduce noise in sensitive circuits.

Working Principles

The LM2575-3.3WU-TR utilizes a step-down switching regulator topology to convert higher input voltages into a stable 3.3V output. It employs pulse-width modulation (PWM) to regulate the output voltage by adjusting the duty cycle of the internal switch. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

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

1. Power supply modules for microcontrollers and digital circuits.
2. Battery-powered devices requiring a regulated 3.3V supply.
3. Automotive electronics, such as infotainment systems and lighting controls.
4. Industrial automation and control systems.
5. Telecommunications equipment.
6. LED lighting applications.

Detailed and Complete Alternative Models

1. LM2575-3.3WU: Similar to LM2575-3.3WU-TR but without tape and reel packaging.
2. LM2575-3.3WU/NOPB: Same specifications as LM2575-3.3WU-TR but with a different package (TO-220-7).
3. LM2575-3.3WU-ADJ: Adjustable output voltage version of the LM2575 series.

(Note: This list is not exhaustive, and there may be other alternative models available in the market.)

In conclusion, the LM2575-3.3WU-TR is a versatile voltage regulator that offers efficient and reliable voltage conversion for various applications. Its compact size, wide input voltage range, and high efficiency make it a popular choice among electronic circuit designers.