LM2575-12BWM

Product Overview

Category: Voltage Regulator
Use: Step-Down (Buck) Switching Regulator
Characteristics: Efficient, Low Dropout, Adjustable Output Voltage
Package: PowerSO-8
Essence: Provides a regulated output voltage from an unregulated input voltage source
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: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2575-12BWM has the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. FB: Feedback Pin
4. VOUT: Output Voltage
5. ON/OFF: Enable Pin
6. NC: No Connection
7. NC: No Connection
8. SW: Switching Node

Functional Features

• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility in system design
• High efficiency minimizes power dissipation and maximizes battery life
• Internal thermal shutdown and current limit protection ensure device safety
• Soft-start function prevents excessive inrush current during startup

Advantages

• Compact PowerSO-8 package enables space-saving designs
• Low dropout voltage ensures stable output even with varying input voltages
• Wide operating temperature range allows for use in harsh environments
• Simple external components required for operation, reducing system complexity

Disadvantages

• Limited output current may not be suitable for high-power applications
• Fixed switching frequency may cause interference in sensitive electronic systems
• Requires careful consideration of input and output voltage ratings for proper operation

Working Principles

The LM2575-12BWM is a step-down switching regulator that utilizes pulse-width modulation (PWM) to regulate the output voltage. It operates by rapidly switching an internal power transistor on and off, controlling the energy transfer from the input to the output. The feedback pin senses the output voltage and adjusts the duty cycle of the switching signal to maintain a stable output voltage.

Detailed Application Field Plans

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

1. Automotive: Powering infotainment systems, lighting modules, and sensors
2. Industrial: Providing regulated power for control systems, motor drives, and instrumentation
3. Telecommunications: Supplying stable voltage to communication equipment and base stations
4. Consumer Electronics: Powering portable devices, audio/video equipment, and home appliances

Detailed and Complete Alternative Models

1. LM2596-12: Similar step-down switching regulator with adjustable output voltage
2. LM317: Linear voltage regulator with adjustable output voltage and higher output current capability
3. LT1763: Low dropout linear regulator with fixed output voltage and high accuracy

These alternative models offer different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

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