LM2574DW-ADJ

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Adjustable output voltage - High efficiency - Wide input voltage range - Low standby current - Thermal shutdown protection

Package: SOIC-8

Essence: The LM2574DW-ADJ is a voltage regulator IC that provides an adjustable output voltage with high efficiency and a wide input voltage range. It is commonly used in various electronic devices to regulate and stabilize the voltage supply.

Packaging/Quantity: The LM2574DW-ADJ is available in a small outline integrated circuit (SOIC) package, which contains 8 pins. It is typically sold in reels or tubes, with a quantity of 250 or 3000 units per package.

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

Pin Configuration

The LM2574DW-ADJ has the following pin configuration:

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| | --| Vin GND |-- Pin 1: Ground --| Vout NC |-- Pin 2: No Connection --| FB NC |-- Pin 3: No Connection --| ON/OFF NC |-- Pin 4: No Connection --| NC NC |-- Pin 5: No Connection --| NC NC |-- Pin 6: No Connection --| NC NC |-- Pin 7: No Connection --| NC Vcc |-- Pin 8: Supply Voltage |___________| ```

Functional Features

• Adjustable Output Voltage: The LM2574DW-ADJ allows the user to adjust the output voltage according to their specific requirements.
• High Efficiency: This voltage regulator IC offers high efficiency, minimizing power losses and maximizing energy conversion.
• Wide Input Voltage Range: It can handle a wide range of input voltages, making it suitable for various applications.
• Low Standby Current: The LM2574DW-ADJ consumes very low standby current when not in use, reducing power consumption.
• Thermal Shutdown Protection: It incorporates thermal shutdown protection to prevent damage from excessive heat.

Advantages and Disadvantages

Advantages: - Flexibility in adjusting output voltage - Efficient power conversion - Versatile application range - Low power consumption in standby mode - Protection against overheating

Disadvantages: - Limited output current capacity (up to 0.5A) - Requires external components for proper operation - Sensitive to voltage spikes or transients

Working Principles

The LM2574DW-ADJ operates as a step-down switching voltage regulator. It uses a pulse-width modulation (PWM) control scheme to regulate the output voltage. The input voltage is first converted into a high-frequency square wave using an internal oscillator. This square wave is then fed into a power switch that controls the duty cycle. By adjusting the duty cycle, the output voltage can be regulated. The feedback pin (FB) is used to sense the output voltage and provide feedback to the control circuitry for regulation.

Detailed Application Field Plans

The LM2574DW-ADJ is widely used in various electronic devices and applications, including: 1. Power supplies for microcontrollers and other digital circuits 2. Battery chargers 3. LED lighting systems 4. Automotive electronics 5. Industrial control systems 6. Portable electronic devices

Detailed and Complete Alternative Models

1. LM2574-ADJ: Similar to LM2574DW-ADJ, but available in a TO-220 package.
2. LM2596S-ADJ: A similar voltage regulator IC with adjustable output voltage and higher output current capacity.
3. LM317T: Adjustable linear voltage regulator with a different operating principle.

These alternative models offer similar functionality and can be used as substitutes for the LM2574DW-ADJ in various applications.

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