LM2575-12WU

Product Overview

Category

The LM2575-12WU belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 12V
• Output Current: Up to 1A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2575-12WU comes in a TO-263 package, also known as D2PAK or DDPAK.

Essence

The essence of the LM2575-12WU is its ability to efficiently regulate voltage with a wide input voltage range and high output current capability.

Packaging/Quantity

The LM2575-12WU is typically packaged in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 12V
• Output Current: Up to 1A
• Dropout Voltage: 1.3V (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)

Pin Configuration

The LM2575-12WU has the following pin configuration:

```

---

| | --| Vin GND|-- --| Vout FB |-- --| SW NC |-- |___________| ```

• Vin: Input voltage pin
• GND: Ground pin
• Vout: Output voltage pin
• FB: Feedback pin
• SW: Switching pin
• NC: No connection pin

Functional Features

The LM2575-12WU offers the following functional features:

1. Wide input voltage range allows for versatile applications.
2. High output current capability of up to 1A.
3. Efficient voltage regulation with up to 92% efficiency.
4. Low dropout voltage ensures minimal power loss.
5. Excellent line and load regulation for stable output voltage.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables flexibility in various applications.
• High output current capability suits power-hungry devices.
• Efficient voltage regulation minimizes power dissipation.
• Compact TO-263 package facilitates easy integration into circuits.

Disadvantages

• Switching frequency may introduce electromagnetic interference (EMI) in sensitive applications.
• Requires external components for proper operation, increasing complexity.

Working Principles

The LM2575-12WU operates as a step-down switching regulator. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal oscillator generates a fixed frequency square wave, which controls the duty cycle of the switch. By adjusting the duty cycle, the output voltage is regulated.

Detailed Application Field Plans

The LM2575-12WU finds applications in various fields, including:

1. Power supply modules for industrial equipment.
2. Automotive electronics, such as car audio systems.
3. Battery charging circuits.
4. LED lighting systems.
5. Portable electronic devices.

Detailed and Complete Alternative Models

Some alternative models to the LM2575-12WU include:

1. LM2576-12WU: Similar specifications but with adjustable output voltage.
2. LM2596-12WU: Higher output current capability of up to 3A.
3. LM2574-12WU: Lower input voltage range suitable for battery-powered applications.

These alternative models offer similar functionality but may have different specifications or package types.

In conclusion, the LM2575-12WU is a versatile voltage regulator with a wide input voltage range and high output current capability. Its efficient operation and compact package make it suitable for various applications in different fields. However, it is important to consider its disadvantages, such as potential EMI issues and the need for external components. Alternative models provide options with varying specifications to suit specific requirements.