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