The XL4015 is a Buck Converter DC DC Step Down Converter 5V-32V To 0.8V-30V 5A 75W. This product is a 180 KHz fixed frequency PWM DC/DC module, capable of driving a 5A load with high efficiency, low ripple and excellent line & load regulation.
MIP0227SY 700V SILICON MOS FET POWER AMPLIFIER 142-163MHz 7W FM PORTABLE RADIO. ... SILICON MOS FET POWER AMPLIFIER 896-941MHz 3W FM PORTABLE RADIO. ... Silicon P Channel MOS FET High Speed Power Switching.
The LTC3780 is a DC-DC-Auto-Up & Down-Voltage-Regulator-5-32V-to-1-24V-DC-Adjustable-Converter. My interest in this DC-DC switcher is to operate 19VDC laptops/notebooks and LCD TVs from 12V batteries/solar.