This project is intended to create circuit control DC Solar Pump. Using a microcontroller dsPIC30f2010 control Buck Converter circuit because the Buck Converter circuit can step down output voltage and step up output current. It is helps in start motor, the pump can operate while the low light and can fine maximum power point tracking of solar cell. By circuit design that can accept input voltage must not exceed 40 volts incoming currents up to 10 amperes and use a pump with a maximum 250 Watts from the experimental results concluded that the circuit can be paid the maximum power point tracking throughout the day. Experimental operation of pumps connected directly with a solar panel does not work. But if you continue through the cycle the pump can work by pumping approximately 10,000 litres of water can be pumped about 8 hours per day and 86 percent cycle efficiency.