The LM2574N-12 from Texas Instruments is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator capable of driving a 0.5A load with excellent line and load regulation. This fixed-output voltage regulator is designed to minimize the number of external components to simplify the power supply design.

Key Features

• Output Voltage: 12V fixed output with a ±4% max tolerance over the full temperature range.
• Output Current: Capable of supplying 0.5A output current.
• High Efficiency: Uses a simple high-efficiency buck-switching design, which typically has an efficiency of 77% to 87%.
• Wide Input Voltage Range: Can operate over a wide input voltage range from 4.75V to 40V.
• Requires Few External Components: Designed for a minimal external part count to simplify design and reduce overall cost.
• 52 kHz Fixed Frequency Internal Oscillator: The frequency simplifies noise filtering in noise-sensitive applications.
• Thermal Shutdown and Current Limit Protection: Ensures the longevity and reliability of the regulator and the system it is part of.

Applications

The LM2574N-12 is suitable for a variety of applications, including:

• Simple high-efficiency step-down (buck) regulators.
• Efficient pre-regulators for linear regulators.
• On-card switching regulators.
• Positive to negative converter (Buck-Boost).

Package and Quality

The device is available in a standard 5-lead TO-220 package, making it easy to integrate into a wide range of electronic circuits. With Texas Instruments' commitment to quality, the LM2574N-12 is designed to meet the rigorous standards of the electronics industry, ensuring reliability and performance.