LM2574N-012

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Input Voltage Range: 4.5V to 40V - Output Voltage: 12V - Output Current: Up to 0.5A - Efficiency: Up to 90% - Switching Frequency: 52 kHz - Operating Temperature Range: -40°C to +125°C

Package: DIP-8 (Dual In-line Package, 8 pins)

Essence: The LM2574N-012 is a step-down voltage regulator IC that provides a regulated output voltage of 12V from an input voltage range of 4.5V to 40V.

Packaging/Quantity: The LM2574N-012 is typically available in tubes or reels, with quantities varying depending on the supplier.

Specifications

The LM2574N-012 has the following specifications:

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 12V
• Output Current: Up to 0.5A
• Switching Frequency: 52 kHz
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2574N-012 has a DIP-8 package with the following pin configuration:

```

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| | --| Vin GND |-- Pin 1 --| Vout NC |-- Pin 2 --| FB NC |-- Pin 3 --| NC NC |-- Pin 4 --| NC NC |-- Pin 5 --| NC NC |-- Pin 6 --| NC NC |-- Pin 7 --| NC NC |-- Pin 8 |___________| ```

Functional Features

The LM2574N-012 offers the following functional features:

1. Step-Down Voltage Regulation: It efficiently steps down the input voltage to a regulated 12V output.
2. Wide Input Voltage Range: It can accept input voltages ranging from 4.5V to 40V, making it suitable for various applications.
3. High Efficiency: With an efficiency of up to 90%, it minimizes power losses and maximizes energy conversion.
4. Switching Frequency: The IC operates at a switching frequency of 52 kHz, enabling compact design and reducing external component size.
5. Thermal Protection: It incorporates thermal shutdown circuitry to prevent damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows flexibility in different applications. - High efficiency reduces power dissipation and extends battery life. - Compact size and low external component count simplify circuit design. - Thermal protection ensures safe operation under high temperature conditions.

Disadvantages: - Limited output current capability (up to 0.5A) may not be sufficient for high-power applications. - Requires careful consideration of input and output capacitor selection for optimal performance.

Working Principles

The LM2574N-012 is a step-down voltage regulator that utilizes a pulse-width modulation (PWM) control scheme. It operates by rapidly switching an internal power transistor on and off to regulate the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable 12V output. This switching action allows for efficient voltage conversion with minimal power loss.

Detailed Application Field Plans

The LM2574N-012 is commonly used in various applications, including but not limited to:

1. Power Supplies: It can be used in power supply circuits to provide a regulated 12V output for microcontrollers, sensors, and other electronic components.
2. Automotive Electronics: The IC is suitable for automotive applications, such as powering LED lighting systems, infotainment systems, and onboard communication devices.
3. Industrial Control Systems: It finds application in industrial control systems, where it can regulate voltage for motor drives, PLCs (Programmable Logic Controllers), and other automation equipment.
4. Battery-Powered Devices: Due to its wide input voltage range and high efficiency, it is ideal for battery-powered devices that require a stable 12V supply, such as portable audio players, GPS devices, and handheld instruments.

Detailed and Complete Alternative Models

Some alternative models to the LM2574N-012 include:

1. LM2574-12: Similar to LM2574N-012, but available in a TO-220 package.
2. LM2596S-12: A step-down voltage regulator with adjustable output voltage and higher output current capability.
3. LM317: A linear