The US3004/5 series of controller ICs are specifically designed to meet Intel specification for Pentium IIITM microprocessor applications as well as the next generation P6 family processors. The IC provides a single chip controller IC for the Vcore , GTL+ and clock supplies required for the Pentium III applications. These devices feature a patented topology that in combination with a few external components as shown in the typical application circuit ,will provide in excess of 20A of output current for an on- board DC/DC converter while automatically providing the right output voltage via the 5 bit internal DAC meeting the latest VRM specification .These products also feature, loss less current sensing by using the Rds-on of the high side Power MOSFET as the sensing resistor, a Power Good window comparator that switches its open collector output low when the output is outside of a 10% window. Other features of the device are ; Undervoltage lockout for both 5V and 12V supplies, an external programmable soft start function as well as programming the oscillator frequency by using an external capacitor.