AIC1574
5-bit DAC, Synchronous PWM Power
Regulator with Triple Linear Controllers
n FEATURES
l l
n DESCRIPTION
The AIC1574 combines a synchronous voltage mode controller with three linear controller as well as the monitoring and protection functions in this chip.
The PWM controller regulates the microprocessor core voltage with a synchronous rectified buck converter.
The three linear controllers regulate power for the 1.
5V or 3.
3V AGP bus power, the 1.
5V GTL bus and the 1.
8V power for the chip set core voltage and/or cache memory circuits.
An integrated 5 bit D/A converter that adjusts the core PWM output voltage from 2.
1V to 3.
5V in 0.
1V increments and from 1.
3V to 2.
05V in 0.
05V incremen...