DESCRIPTION The IRU3004 controller IC is designed to meet the Intel Pentium Microprocessor Specification Part IIIA applications as well as the next generation P6 series processors. This IC provides a single-chip controller IC for the core voltage, GTL+ clock and supplies required for a Pentium III application. Featuring a patented IRU3004 topology that combines a small number of external components as shown in the Typical Application Circuit, it will provide an output current of 20A of excess onboard DC-DC conversion while automatically providing the output voltage through a 5-bit internal DAC to meet the latest specification of the VRM. The IRU3004 also features lossless current sensing by using a high RDS(ON) side, a sense resistor and a good window comparator for a power MOSFET, switching the open collector output low when the output is ±10% outside the window. Other features of the device are: supply voltage lock at 5V and 12V, external programmable soft-start function and programmable oscillator frequency through the use of external capacitors.

Features Meet the latest VRM8.4 specification PentiumIII provides core voltage, single-chip solution GTL+ and clock supply on-board DAC output voltage scheme 1.3V to 3.5V. The IRU3004 remains on the VID code dual linear regulator controller board for 1.5V GTL+ and 2.5V clock supplies lossless short circuit protection Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as dynamic 100% duty cycle Load Minimal Component Count No External Compensation Soft Start Function High Current Totem Pole Drive Direct Drive External Power MOSFET
good power supply