LM2575D2T-015

Product Overview

Category: Voltage Regulator
Use: Step-Down (Buck) Switching Regulator
Characteristics: High Efficiency, Wide Input Voltage Range, Adjustable Output Voltage, Thermal Shutdown Protection
Package: TO-263-6 (D2PAK)
Essence: LM2575D2T-015 is a voltage regulator that converts a higher input voltage to a lower output voltage. It is commonly used in various electronic devices to provide stable power supply.
Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 1.5V
• Output Current: Up to 1A
• Switching Frequency: 52 kHz
• Dropout Voltage: 1.3V (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2575D2T-015 has six pins arranged as follows:

```

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| | --| VIN | --| GND | --| FB | --| SW | --| VOUT | |_______| ```

• VIN: Input Voltage
• GND: Ground
• FB: Feedback Pin
• SW: Switching Pin
• VOUT: Output Voltage

Functional Features

• High Efficiency: The LM2575D2T-015 offers high efficiency conversion, minimizing power loss during voltage regulation.
• Wide Input Voltage Range: It can accept input voltages ranging from 4.75V to 40V, making it suitable for a wide range of applications.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, allowing flexibility in design.
• Thermal Shutdown Protection: The regulator includes thermal shutdown protection to prevent damage due to excessive heat.

Advantages and Disadvantages

Advantages: - High efficiency conversion - Wide input voltage range - Adjustable output voltage - Thermal shutdown protection

Disadvantages: - Limited output current (up to 1A) - Dropout voltage of 1.3V may not be suitable for low-power applications

Working Principles

The LM2575D2T-015 operates as a step-down switching regulator. It uses a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal oscillator generates a fixed frequency signal, which controls the switching of the internal power MOSFET. This switching action converts the higher input voltage to the desired lower output voltage with high efficiency.

Detailed Application Field Plans

The LM2575D2T-015 is commonly used in various electronic devices that require a stable and regulated power supply. Some typical application fields include:

1. Power Supply Modules: It can be used in power supply modules for computers, industrial equipment, and consumer electronics.
2. Automotive Electronics: It finds applications in automotive systems such as infotainment systems, lighting, and motor control.
3. Battery Charging Systems: The regulator can be utilized in battery charging circuits for portable devices like smartphones and tablets.
4. LED Lighting: It is suitable for driving LED lighting systems, providing efficient and constant power to LEDs.

Detailed and Complete Alternative Models

1. LM2576-ADJ: Similar to LM2575D2T-015, but offers adjustable output voltage.
2. LM2596S-ADJ: A popular alternative with adjustable output voltage and higher output current capability.
3. LM317: Linear voltage regulator with adjustable output voltage, suitable for low-power applications.

These alternative models provide similar functionality and can be considered based on specific requirements and design constraints.

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