Figure 1-1 is a block diagram of the dsPICDEM™ SMPS Buck Development Board, A dsPIC30F2020 DSC controls two independent DC/DC synchronous buck converters, providing closed-loop Proportional, Integral, Derivative (PID) control in software to maintain desired output voltage levels. The dsPIC ® DSC device provides the neces- sary memory and peripherals for A/D conversion, PWM generation and general purpose I/O, precluding the need to perform these functions in external circuitry. dsPICDEM SMPS Buck Development Board User’s Guide 2006 Microchip Technology Inc. DS70181A Note the following details of the code protection feature on Microchip devices: Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner out……