lx1677 Microsemi Corporation, lx1677 Datasheet - Page 14

• Manufacturer Part Number: lx1677
• Description: Amd64 Processor Vrm Controller
• Manufacturer: Microsemi Corporation

Copyright © 2000
Rev 1.1, 2003-03-03
S
DACOUT pin and will be charged, or discharged, at a
linear rate by the internal 50uA bi-directional current source
after the UVLO circuit has been satisfied. Whenever the
VID code is changed during normal operation the soft-start
capacitor will determine the rate of change at the output.
OFT
An external soft-start capacitor is connected to the
-S
TM
TART
C
APACITOR
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
A P P L I C A T I O N N O T E ( C O N T I N U E D )
Integrated Products Division
®
Microsemi
P
The DAC inputs are the Voltage Identification (VID) 0-4
lines, the VID table lists the available output voltages for
the corresponding VID codes.
voltage and only the steps listed are available.
ROGRAMMING
Output voltage is determined by the internal 5 bit DAC.
There are no external resistor dividers to program output
AMD64 Processor VRM Controller
P
RODUCTION
T
HE
O
UTPUT
D
ATA
V
OLTAGE
S
HEET
LX1677
Page 14