DESCRIPTION

The LX1669 is a Monolithic Switching Regulator Controller IC designed to provide a low cost, high performance adjustable power supply for advanced microprocessors and other applications requiring a very fast transient response and a high degree of accuracy. It provides a programmable switching regulator output suitable for powering Pentium® II and other processors.

KEY FEATURES

■ 5-Bit Programmable Output For CPU Core Supply

■ Power Solution For Pentium II Processors

■ No Sense Resistor Required For Short-Circuit Current Limiting

■ Soft-Start And Hiccup-Mode Current Limiting Functions

■ Modulated Constant Off-Time Control Mechanism For Fast Transient Response And Simple System Design

■ Power Good Flag

■ Over-Voltage Pin Can Drive SCR Crowbar Or Turn Off Signal Silver-Box Power Supply

■ Digital-Compatible Inputs (Including VID Pins)

APPLICATIONS

■ Socket 7 Processor Supplies

■ Pentium II Processor Supplies

■ Deschutes CPU & L2-Cache Memory Supplies

■ Voltage Regulator Modules

■ General Purpose And Microprocessor DC:DC Supplies