US3004

US3004/US3005 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH DUAL LDO CONTROLLER FEATURES Meets Latest VRM 8.4 Specification for PIII Provides Single Chip Solution for Vcore, GTL+ and Clock Supply On board DAC programs the output voltage from 1.3V to 3.5V. The US3004/5 remains on for VID code of (11111). Dual linear regulator controller on board for 1.5V GTL+ and 2.5V clock supplies Loss less Short Circuit Protection Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Min part count, No external Compensation Soft Start High current totem pole driver for direct driving of the external Power MOSFET Power Good function DESCRIPTION The US3004/5 series of controller ICs are specifically designed to meet Intel specification for Pentium III™ 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 MOS...