The DC-DC Switched Mode Power Supply is designed especially for the
LC828 radio-module to power the modified Motorola Portable radio,
but can easily be used for other applications that require 3.5 Amp.
The converter is a high efficient 500 kHz monolithic buck-mode
switching regulator. The design features a low EM radiation, to
comply with the international EMC requirements.
Detailed description of the Switch Mode Power supply can be found