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LM2574N-ADJG
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LM2574N-ADJG

Product Overview

Category

The LM2574N-ADJG belongs to the category of voltage regulators.

Use

It is commonly used to regulate voltage in electronic circuits.

Characteristics

  • Adjustable output voltage
  • High efficiency
  • Wide input voltage range
  • Low standby current
  • Thermal shutdown protection

Package

The LM2574N-ADJG comes in a TO-263 package.

Essence

This voltage regulator is an essential component for maintaining stable and regulated voltage levels in various electronic devices.

Packaging/Quantity

The LM2574N-ADJG is typically packaged in reels, with 250 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage Range: 1.23V to 37V
  • Output Current: Up to 0.5A
  • Switching Frequency: 52 kHz
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2574N-ADJG has the following pin configuration:

  1. VIN (Input Voltage)
  2. GND (Ground)
  3. FB (Feedback)
  4. VOUT (Output Voltage)

Functional Features

  • Adjustable output voltage through external resistors
  • Internal oscillator for switching control
  • Overcurrent protection
  • Short-circuit protection
  • Soft-start function to reduce inrush current

Advantages and Disadvantages

Advantages

  • High efficiency leads to reduced power dissipation
  • Wide input voltage range allows for versatile applications
  • Thermal shutdown protection prevents damage due to overheating
  • Compact size and easy integration into circuit designs

Disadvantages

  • Limited output current capacity (up to 0.5A)
  • Requires external components for proper operation

Working Principles

The LM2574N-ADJG operates as a step-down switching voltage regulator. It uses pulse-width modulation (PWM) to control the output voltage. The internal oscillator generates a square wave that drives the power switch, controlling the duty cycle and regulating the output voltage. By adjusting the feedback pin voltage, the desired output voltage can be set.

Detailed Application Field Plans

The LM2574N-ADJG 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

Detailed and Complete Alternative Models

Some alternative models to the LM2574N-ADJG include:

  1. LM2596S-ADJ: Similar features with higher output current capacity
  2. LM317T: Adjustable linear voltage regulator
  3. LT1084CP-ADJ: High-current adjustable linear regulator
  4. TPS5430-ADJ: Synchronous buck converter with adjustable output voltage

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

In conclusion, the LM2574N-ADJG is a versatile voltage regulator with adjustable output voltage, high efficiency, and thermal protection. Its compact size and wide input voltage range make it suitable for various applications in different fields. However, its limited output current capacity and requirement for external components should be considered when selecting this regulator for a particular project.

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

Sure! Here are 10 common questions and answers related to the application of LM2574N-ADJG:

  1. Q: What is LM2574N-ADJG? A: LM2574N-ADJG is a voltage regulator IC that can step down an input voltage to a lower, adjustable output voltage.

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

  3. Q: What is the output voltage range for LM2574N-ADJG? A: The output voltage range for LM2574N-ADJG can be adjusted from 1.23V to the input voltage minus 1.5V.

  4. Q: How much current can LM2574N-ADJG handle? A: LM2574N-ADJG can handle a maximum output current of 0.5A.

  5. Q: Can LM2574N-ADJG be used in battery-powered applications? A: Yes, LM2574N-ADJG can be used in battery-powered applications as it has low quiescent current and high efficiency.

  6. Q: Does LM2574N-ADJG require any external components? A: Yes, LM2574N-ADJG requires a few external components such as input/output capacitors and an inductor.

  7. Q: Is LM2574N-ADJG suitable for automotive applications? A: Yes, LM2574N-ADJG is suitable for automotive applications as it can handle wide input voltage variations and has built-in protection features.

  8. Q: Can LM2574N-ADJG be used for both step-up and step-down voltage conversion? A: No, LM2574N-ADJG is specifically designed for step-down (buck) voltage conversion.

  9. Q: What is the efficiency of LM2574N-ADJG? A: The efficiency of LM2574N-ADJG can reach up to 90% depending on the input/output voltage difference.

  10. Q: Are there any application notes or reference designs available for LM2574N-ADJG? A: Yes, Texas Instruments provides application notes and reference designs that can help in implementing LM2574N-ADJG in various technical solutions.

Please note that these answers are general and may vary depending on specific design considerations and requirements. It's always recommended to refer to the datasheet and application notes provided by the manufacturer for accurate information.