US3022

US3022 4 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS FOUR LDO CONTROLLER PRELIMINARY DATASHEET FEATURES Provides Single Chip Solution for Vcore, GTL+ ,AGP Bus, 1.8V , 2.5V Automatic Voltage Selection for AGP slot's Vddq supply 4 Linear regulator controller on board to achieve lowest system cost solution Standby Vref provides reference for the ACPI regulators Designed to meet Intel Latest VRM specification for next generation micrprocessors On board DAC programs the output voltage from 1.3V to 2.05V On board resistor dividers provides lowest component count Loss less Short Circuit Protection for all outputs Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Soft Start High current totem pole driver for direct driving of the external Power MOSFET Power Good function Monitors all Outputs OVP Circuitry Protects the Switcher Output and generates a Fault output DESCRIPTION The US3022 is the first controller IC with five controller in one package specifically designed to meet Intel specification for next generation microprocessor applications requiring multiple on board regulators . The US3022 provides a single chip controller IC for the Vcore , 4 LDO controllers, one with the automatic select pin that connects to the TYPE DETECT pin of the AGP slot for the AGP Vddq supply, one for GTL+ , the other for the 1.8V chip set regulator as well as 2.5V for the clock as required for the next gene...