Circuit Project Electronic

The LM2574 series of regulator are monolithic integrated circuits that provide all the active functions for a step down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation.

Output Current 500 mA
InputMin Voltage 4 Volt
InputMax Voltage 60 Volt
Output Min 3.3, 1.23, 12, 15, 5 Volt
Output Max 57, 3.3, 12, 15, 5 Volt
Frequency Min 52000 Hz
Frequency Max 52000 Hz
Efficiency 88, 77, 72 %

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

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Read More Source:
http://www.national.com/mpf/LM/LM2574HV.html
Thank you.