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ISL6595 Datasheet, PDF (17/22 Pages) Intersil Corporation – Digital Multiphase Controller
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ISL6595
TABLE 2. Intel™ VR10 VID TABLE (8-BIT, Note 8) (Continued)
VIDHI VIDLO VOLTAGE VIDHI VIDLO VOLTAGE
(HEX) (HEX)
(V)
(HEX) (HEX)
(V)
7
E
0.82500
A
E
0.52500
7
F
0.81875
A
F
0.51875
8
0
0.81250
B
0
0.51250
8
1
0.80625
B
1
0.50625
8
2
0.80000
B
2
0.50000
8
3
0.79375
B
3
0.49375
8
4
0.78750
B
4
0.48750
8
5
0.78125
B
5
0.48125
8
6
0.77500
B
6
0.47500
8
7
0.76875
B
7
0.46875
8
8
0.76250
B
8
0.46250
8
9
0.75625
B
9
0.45625
8
A
0.75000
B
A
0.45000
8
B
0.74375
B
B
0.44375
8
C
0.73750
B
C
0.43750
8
D
0.73125
B
D
0.43125
8
E
0.72500
B
E
0.42500
8
F
0.71875
B
F
0.41875
C
0
0.41250
E
0
0.21250
C
1
0.40625
E
1
0.20625
C
2
0.40000
E
2
0.20000
C
3
0.39375
E
3
0.19375
C
4
0.38750
E
4
0.18750
C
5
0.38125
E
5
0.18125
C
6
0.37500
E
6
0.17500
C
7
0.36875
E
7
0.16875
C
8
0.36250
E
8
0.16250
C
9
0.35625
E
9
0.15625
C
A
0.35000
E
A
0.15000
C
B
0.34375
E
B
0.14375
C
C
0.33750
E
C
0.13750
C
D
0.33125
E
D
0.13125
C
E
0.32500
E
E
0.12500
C
F
0.31875
E
F
0.11875
D
0
0.31250
F
0
0.11250
D
1
0.30625
F
1
0.10625
D
2
0.30000
F
2
0.10000
D
3
0.29375
F
3
0.09375
D
4
0.28750
F
4
0.08750
TABLE 2. Intel™ VR10 VID TABLE (8-BIT, Note 8) (Continued)
VIDHI VIDLO VOLTAGE VIDHI VIDLO VOLTAGE
(HEX) (HEX)
(V)
(HEX) (HEX)
(V)
D
5
0.28125
F
5
0.08125
D
6
0.27500
F
6
0.07500
D
7
0.26875
F
7
0.06875
D
8
0.26250
F
8
0.06250
D
9
0.25625
F
9
0.05625
D
A
0.25000
F
A
0.05000
D
B
0.24375
F
B
0.04375
D
C
0.23750
F
C
0.03750
D
D
0.23125
F
D
0.03125
D
E
0.22500
F
E
OFF
D
F
0.21875
F
F
OFF
NOTE:
8. VID_SEL=1, VIDHI = (VID7, VID6, VID5, VID4), VIDLO = (VID3,
VID2, VID1, VID0)
Active Voltage Positioning (AVP)
The ISL6595 allows selection of both the AVP loadline slope
and the VID setpoint offset. The loadline slope is selectable
from 0mΩ to 4mΩ, and the setpoint offset is selectable from
0mV to 50mV in 1.56mV steps.
The total current is computed by adding the current
measured from each phase, then filtering with a single pole
programmable filter to set the AVP bandwidth.
Current Balancing/Thermal Balancing
The ISL6595 also uses the channel current measurements
to perform current balancing. To minimize thermal gradient
effects, each channel adaptively adjusts its current to match
the average channel current.
The current balance function can also be used to induce a
thermal gradient if, for example, some channels have
greater cooling capability due to better proximity to airflow.
The ISL6595 allows the user to independently force an offset
current to each channel, creating a current gradient. This
causes the current balance to force the channels with
greater cooling capability to supply a higher percentage of
the total current, creating a net thermal equilibrium amongst
all channels.
Active Transient Response (ATR)
Active Transient Response (ATR) is supported through
load-line tracking comparators with programmable
thresholds. Both internal- and external-loop ATR are
supported. Internal-loop ATR engages multiple phases to
maximize output current slew rate and minimize spike and
droop due to large transient events. Three independent
window comparators allows for variation in the number of
phases that sink or source. If the transient is slight, only one
17
FN9192.2
December 4, 2008
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