DESCRIPTION
The US3021B controller IC is specifically designed to meet Intel specification for next generation microprocessor applications requiring multiple on board regulators . The US3021B provides a single chip controller IC for the Vcore , 3LDO 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+ and the other for the 1.8V chip set regulator as required for the next generation PC applications.

FEATURES
■ Provides Single Chip Solution for Vcore, GTL+ ,AGP Bus, and 1.8V
■ Automatic Voltage Selection for AGP slot Vddq supply
■ Linear regulator controller on board for 1.8V
■ Designed to meet Intel Latest VRM specification for next generation micrprocessors
■ On board DAC programs the output voltage from 1.3V to 3.5V
■ Linear regulator controller on board for 1.5V GTL+ supply
■ 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
■ Minimum part count
■ 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

APPLICATIONS
■ Total Power Soloution for Next Generation Intel Processor application