DESCRIPTION

The IRU3007 controller IC is specifically designed to meet Intel specification for Pentium IIä microprocessor applications as well as the next generation of P6 family processors. The IRU3007 provides a single chip controller IC for the Vcore, LDO controller for GTL+ and an internal 200mA regulator for clock supply which are required for the Pentium II applications. It also contains a switching controller to convert 5V to 3.3V regulator for on-board applications that uses either AT type power supply or is desired not to rely on the ATX power supply’s 3.3V output.

FEATURES

■ Provides Single Chip Solution for Vcore, GTL+, Clock Supply & 3.3V Switcher On-Board

■ Second switcher provides simple control for the on-board 3.3V supply

■ 200mA On-Board LDO Regulator

■ Designed to meet Intel VRM 8.2 and 8.3 specification for Pentium IIä

■ 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

■ 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 drivers for directly driving the external Power MOSFETs

■ Power Good function monitors all outputs

■ Over-Voltage Protection circuitry protects the switcher outputs and generates a fault output

■ Thermal Shutdown

APPLICATIONS

■ Total Power Solution for Pentium II processor application