LX1668
DESCRIPTION
The LX1668 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, together with one internal linear low dropout regulator and one adjustable linear regulator driver. The LX1668 offers a triple-output single-chip power supply for Pentium® II and other processors. Programmable Synchronous Rectifier Driver for CPU Core. The main output is adjustable from 1.3 to 3.5V using a TTLpatible 5-bit digital code to meet Intel specifications. The IC can read the signal from a DIP-switch, hardwired to Pentium II processor’s pins or from software. The 5-bit code adjusts the output voltage between 1.30 and 2.05V in 50m V increments, and between 2.0 and 3.5V in 100m V increments. The device can drive dual MOSFET’s resulting in typical efficiencies...
