LM2575-12WU-TR

Product Overview

Category

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

Use

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

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-TR comes in a TO-263-7 package, also known as D²PAK/TO-263.

Essence

The essence of the LM2575-12WU-TR is its ability to efficiently convert higher input voltages into a regulated 12V output.

Packaging/Quantity

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

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 12V
• Output Current: Up to 1A
• Quiescent Current: 10mA (typical)
• Dropout Voltage: 2V (typical)
• Line Regulation: ±0.5% (typical)
• Load Regulation: ±0.5% (typical)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2575-12WU-TR 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

1. Wide input voltage range allows for versatile applications.
2. High efficiency ensures minimal power loss during voltage conversion.
3. Built-in over-temperature and over-current protection enhances reliability.
4. Adjustable output voltage provides flexibility in various circuit designs.
5. Low quiescent current minimizes power consumption during standby.

Advantages

• Efficient voltage regulation with high conversion efficiency.
• Wide input voltage range enables compatibility with different power sources.
• Compact package size facilitates easy integration into electronic circuits.
• Built-in protection features enhance system reliability.
• Adjustable output voltage offers versatility in design applications.

Disadvantages

• Limited output current capacity of up to 1A may not be suitable for high-power applications.
• Switching frequency of 52 kHz may introduce audible noise in sensitive audio applications.
• Non-isolated design may require additional circuitry for isolation purposes in certain applications.

Working Principles

The LM2575-12WU-TR utilizes a switching regulator topology to efficiently convert the input voltage to a regulated 12V output. It employs a pulse-width modulation (PWM) control scheme to regulate the output voltage. The feedback pin (FB) is used to set the desired output voltage, which can be adjusted using external resistors. The switching pin (SW) controls the internal power switch, enabling efficient voltage conversion. The device also incorporates protection features such as thermal shutdown and current limiting to ensure safe operation.

Detailed Application Field Plans

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

1. Power supply modules for industrial equipment.
2. Automotive electronics, such as car audio systems and lighting controls.
3. Battery charging circuits for portable devices.
4. Distributed power systems in telecommunications.
5. LED lighting applications.

Detailed and Complete Alternative Models

1. LM2576-12WU-TR: Similar to LM2575-12WU-TR, but with a fixed 12V output voltage.
2. LM2596-12WU-TR: Step-down switching regulator with adjustable output voltage.
3. LM317T: Linear voltage regulator with adjustable output voltage.
4. LT1084CP-12: Low dropout linear regulator with fixed 12V output voltage.

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

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