The LM2575D2T-5 from ON Semiconductor is a versatile and robust integrated circuit designed to cater to a wide array of power supply applications. This monolithic integrated circuit provides all the active functions necessary for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation.

Key Features

• Output Voltage: Fixed 5V output with a tolerance of ±4% over line and load conditions.
• Output Current: Capable of delivering 1A of continuous output current.
• High Efficiency: Utilizes a simple external inductor and diode to achieve conversion efficiency up to 90%.
• Wide Input Voltage Range: Operates from a 4.75V to 40V input range, making it suitable for a variety of input sources.
• 52 kHz Fixed Frequency Internal Oscillator: Reduces the size of external components while providing predictable performance.
• Thermal Shutdown and Current Limit Protection: Enhances the safety and reliability of the device under extreme conditions.
• Low Power Standby Mode: Draws only 80µA of standby current, which is beneficial for power-sensitive applications.
• TO-263 Package: Surface-mount package that aids in efficient heat dissipation and space-saving on the PCB.

Applications

The LM2575D2T-5 is a versatile component that is ideal for a diverse range of applications, including:

• Simple high-efficiency step-down (buck) regulators.
• Efficient pre-regulators for linear regulators.
• On-card switching regulators for elimination of noise and distribution problems associated with single-point regulation.
• Positive to negative converter (Buck-Boost).

Conclusion

ON Semiconductor's LM2575D2T-5 is a reliable and efficient solution for designers looking to implement a compact, high-performance power supply in their systems. Its fixed 5V output, high efficiency, and robust protection features make it an excellent choice for both simple and complex power supply designs.