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