LM2575D2T-ADJG

Product Overview

Category: Voltage Regulator
Use: Step-Down (Buck) Switching Regulator
Characteristics: Adjustable Output, Synchronous Rectification
Package: TO-263-6 (D2PAK)
Essence: High-Efficiency DC-DC Converter
Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage Range: 1.23V to 37V
• Output Current: Up to 1A
• Efficiency: Up to 92%
• Switching Frequency: 52kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2575D2T-ADJG has six pins arranged as follows:

```

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| | --| VIN GND|-- --| VOUT SW |-- --| FB NC |-- |___________| ```

1. VIN: Input voltage pin
2. VOUT: Output voltage pin
3. SW: Switching pin
4. FB: Feedback pin
5. NC: No connection
6. GND: Ground pin

Functional Features

• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility
• Synchronous rectification improves efficiency
• Internal thermal shutdown and current limit protection
• Low standby current consumption

Advantages

• High efficiency results in reduced power dissipation
• Compact package size enables space-saving designs
• Wide operating temperature range ensures reliability
• Easy to use with minimal external components required
• Suitable for both automotive and industrial applications

Disadvantages

• Limited output current capability compared to higher-rated regulators
• Requires careful consideration of input and output voltage ranges

Working Principles

The LM2575D2T-ADJG is a step-down switching regulator that converts a higher input voltage to a lower output voltage. It utilizes pulse-width modulation (PWM) to regulate the output voltage. The internal oscillator generates a fixed frequency signal, which controls the duty cycle of the switch. This duty cycle determines the average output voltage.

When the switch is closed, energy is stored in the inductor. When the switch opens, the energy is transferred to the output capacitor and load. The feedback pin monitors the output voltage and adjusts the duty cycle accordingly to maintain a stable output.

Detailed Application Field Plans

The LM2575D2T-ADJG is commonly used in various applications, including:

1. Automotive electronics: Powering infotainment systems, lighting modules, and sensors.
2. Industrial automation: Providing regulated power for control systems, motor drives, and sensors.
3. Telecommunications: Powering base stations, routers, and network equipment.
4. Consumer electronics: Supplying power to audio/video devices, gaming consoles, and portable chargers.
5. Renewable energy systems: Regulating voltage in solar panels, wind turbines, and battery charging circuits.

Detailed and Complete Alternative Models

1. LM2596S-ADJ: Similar adjustable step-down switching regulator with a different package (TO-263-5).
2. LM317: Adjustable linear voltage regulator suitable for low-power applications.
3. LT1370: High-efficiency step-down switching regulator with a wider input voltage range.

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

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