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LM2574N-3.3G
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LM2574N-3.3G

Product Overview

Category

The LM2574N-3.3G belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage: 3.3V
  • Maximum Output Current: 0.5A
  • Efficiency: Up to 90%
  • Switching Frequency: 52 kHz
  • Operating Temperature Range: -40°C to +125°C

Package

The LM2574N-3.3G comes in a TO-220 package, which provides excellent thermal performance and ease of mounting.

Essence

The essence of LM2574N-3.3G lies in its ability to efficiently regulate voltage while maintaining a compact form factor.

Packaging/Quantity

The LM2574N-3.3G is typically packaged in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage: 3.3V
  • Maximum Output Current: 0.5A
  • Quiescent Current: 10mA
  • Dropout Voltage: 1.2V
  • Line Regulation: ±0.5%
  • Load Regulation: ±0.5%
  • Ripple Rejection Ratio: 70dB
  • Switching Frequency: 52 kHz
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2574N-3.3G 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.
  4. SW (Pin 4): Switching pin.
  5. VOUT (Pin 5): Output voltage pin.

Functional Features

  • Wide input voltage range allows for versatile applications.
  • High efficiency ensures minimal power loss.
  • Built-in over-temperature and over-current protection.
  • Adjustable output voltage with external resistors.
  • Soft-start function prevents excessive inrush current.

Advantages

  • Compact form factor enables space-saving designs.
  • Wide input voltage range accommodates various power sources.
  • Efficient voltage regulation reduces power dissipation.
  • Over-temperature and over-current protection enhance reliability.
  • Soft-start function prevents damage during startup.

Disadvantages

  • Limited maximum output current of 0.5A may not be suitable for high-power applications.
  • Switching frequency of 52 kHz may introduce audible noise in sensitive audio circuits.

Working Principles

The LM2574N-3.3G utilizes a switching regulator topology 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. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

The LM2574N-3.3G finds applications in various fields, including:

  1. Power supply modules for microcontrollers and digital circuits.
  2. Battery-powered devices requiring regulated voltage.
  3. Automotive electronics for voltage stabilization.
  4. Industrial control systems.
  5. LED lighting applications.
  6. Portable electronic devices.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM2574N-3.3G include:

  1. LM2596-3.3: A step-down voltage regulator with adjustable output voltage.
  2. LM317T: A linear voltage regulator with adjustable output voltage.
  3. LT1370: A high-efficiency step-down switching regulator.
  4. TPS5430: A synchronous buck converter with adjustable output voltage.

These alternative models provide options for different design requirements and can be considered based on specific application needs.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LM2574N-3.3G en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LM2574N-3.3G in technical solutions:

  1. Q: What is LM2574N-3.3G? A: LM2574N-3.3G is a step-down voltage regulator IC that provides a fixed output voltage of 3.3V.

  2. Q: What is the input voltage range for LM2574N-3.3G? A: The input voltage range for LM2574N-3.3G is typically between 8V and 40V.

  3. Q: What is the maximum output current of LM2574N-3.3G? A: The maximum output current of LM2574N-3.3G is 0.5A (500mA).

  4. Q: Can LM2574N-3.3G be used to step up voltage? A: No, LM2574N-3.3G is a step-down voltage regulator and can only reduce the input voltage to a lower output voltage.

  5. Q: How efficient is LM2574N-3.3G? A: LM2574N-3.3G has a typical efficiency of around 85% to 90%, depending on the input and output voltage conditions.

  6. Q: Is LM2574N-3.3G suitable for battery-powered applications? A: Yes, LM2574N-3.3G is suitable for battery-powered applications as it can efficiently regulate the voltage from a wide range of input voltages.

  7. Q: Can LM2574N-3.3G handle short-circuit conditions? A: LM2574N-3.3G has built-in thermal shutdown and current limiting protection, which helps protect the IC from short-circuit conditions.

  8. Q: What are the typical applications of LM2574N-3.3G? A: LM2574N-3.3G is commonly used in various applications such as battery chargers, power supplies, LED drivers, and other low-power electronic devices.

  9. Q: Does LM2574N-3.3G require external components for operation? A: Yes, LM2574N-3.3G requires a few external components such as input/output capacitors, an inductor, and feedback resistors to set the output voltage.

  10. Q: Can LM2574N-3.3G operate in a wide temperature range? A: Yes, LM2574N-3.3G can operate in a temperature range of -40°C to 125°C, making it suitable for various environmental conditions.

Please note that these answers are general and may vary depending on specific design considerations and datasheet specifications.