LM2575T-12G

Product Overview

Category

The LM2575T-12G 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 LM2575T-12G comes in a TO-220 package, which provides good thermal conductivity and easy mounting on a heat sink.

Essence

The essence of LM2575T-12G lies in its ability to efficiently regulate voltage while providing a stable output.

Packaging/Quantity

The LM2575T-12G is typically available in reels or tubes, with a quantity of 2,500 units per reel or 50 units per tube.

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)
• Quiescent Current: 10mA (typical)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2575T-12G 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 setting the output voltage.
4. SW (Pin 4): Switching pin for controlling the internal power switch.

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss.
• Internal thermal shutdown and current limit protection enhance reliability.
• Adjustable output voltage through external resistors.
• Easy to use and integrate into various circuit designs.

Advantages and Disadvantages

Advantages

• Efficient voltage regulation.
• Wide input voltage range.
• Thermal shutdown and current limit protection.
• Adjustable output voltage.

Disadvantages

• Relatively high quiescent current.
• Requires external components for proper operation.

Working Principles

The LM2575T-12G is a step-down switching regulator that uses a pulse-width modulation (PWM) control scheme. It operates by rapidly switching an internal power switch to regulate the output voltage. The feedback pin (FB) is used to set the desired output voltage, which is compared to an internal reference voltage. The duty cycle of the internal power switch is adjusted accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The LM2575T-12G finds applications in various fields, including:

1. Power supply circuits for microcontrollers and other digital devices.
2. Battery charging circuits.
3. Automotive electronics.
4. Industrial automation systems.
5. LED lighting applications.
6. Portable electronic devices.

Detailed and Complete Alternative Models

Some alternative models to the LM2575T-12G include:

1. LM2596T-12G: Similar specifications with adjustable output voltage.
2. LM2576T-12G: Higher output current capability.
3. LM317T: Linear voltage regulator with adjustable output voltage.
4. LT1370HV: High voltage step-down switching regulator.

These alternative models provide different features and capabilities, allowing users to choose the most suitable option for their specific requirements.

In conclusion, the LM2575T-12G is a versatile voltage regulator with a wide input voltage range, efficient operation, and various applications. Its compact package and reliable performance make it a popular choice in electronic circuits requiring stable voltage regulation.