I am trying to choose between the 2 simple switcher parts. What is the difference? The application is to be adjustable and run a small dc brushed motor at 14-16 volts, 200mA, 4A stall current. I am using an LM350 now but is is too hot. The 14 v will feed a 5v linear reg to run a ATMEGA microprocessor. Is either part acceptable? Thanks, Dave