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ISL62883 Datasheet, PDF (14/39 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs
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ISL62883, ISL62883B
TABLE 1. VID TABLE (Continued)
VID6 VID5 VID4 VID3 VID2 VID1 VID0 VO (V)
1
0
0
0
0
1
0 0.6750
1
0
0
0
0
1
1 0.6625
1
0
0
0
1
0
0 0.6500
1
0
0
0
1
0
1 0.6375
1
0
0
0
1
1
0 0.6250
1
0
0
0
1
1
1 0.6125
1
0
0
1
0
0
0 0.6000
1
0
0
1
0
0
1 0.5875
1
0
0
1
0
1
0 0.5750
1
0
0
1
0
1
1 0.5625
1
0
0
1
1
0
0 0.5500
1
0
0
1
1
0
1 0.5375
1
0
0
1
1
1
0 0.5250
1
0
0
1
1
1
1 0.5125
1
0
1
0
0
0
0 0.5000
1
0
1
0
0
0
1 0.4875
1
0
1
0
0
1
0 0.4750
1
0
1
0
0
1
1 0.4625
1
0
1
0
1
0
0 0.4500
1
0
1
0
1
0
1 0.4375
1
0
1
0
1
1
0 0.4250
1
0
1
0
1
1
1 0.4125
1
0
1
1
0
0
0 0.4000
1
0
1
1
0
0
1 0.3875
1
0
1
1
0
1
0 0.3750
1
0
1
1
0
1
1 0.3625
1
0
1
1
1
0
0 0.3500
1
0
1
1
1
0
1 0.3375
1
0
1
1
1
1
0 0.3250
1
0
1
1
1
1
1 0.3125
1
1
0
0
0
0
0 0.3000
1
1
0
0
0
0
1 0.2875
1
1
0
0
0
1
0 0.2750
1
1
0
0
0
1
1 0.2625
1
1
0
0
1
0
0 0.2500
1
1
0
0
1
0
1 0.2375
1
1
0
0
1
1
0 0.2250
1
1
0
0
1
1
1 0.2125
1
1
0
1
0
0
0 0.2000
1
1
0
1
0
0
1 0.1875
1
1
0
1
0
1
0 0.1750
1
1
0
1
0
1
1 0.1625
1
1
0
1
1
0
0 0.1500
TABLE 1. VID TABLE (Continued)
VID6 VID5 VID4 VID3 VID2 VID1 VID0 VO (V)
1
1
0
1
1
0
1 0.1375
1
1
0
1
1
1
0 0.1250
1
1
0
1
1
1
1 0.1125
1
1
1
0
0
0
0 0.1000
1
1
1
0
0
0
1 0.0875
1
1
1
0
0
1
0 0.0750
1
1
1
0
0
1
1 0.0625
1
1
1
0
1
0
0 0.0500
1
1
1
0
1
0
1 0.0375
1
1
1
0
1
1
0 0.0250
1
1
1
0
1
1
1 0.0125
1
1
1
1
0
0
0 0.0000
1
1
1
1
0
0
1 0.0000
1
1
1
1
0
1
0 0.0000
1
1
1
1
0
1
1 0.0000
1
1
1
1
1
0
0 0.0000
1
1
1
1
1
0
1 0.0000
1
1
1
1
1
1
0 0.0000
1
1
1
1
1
1
1 0.0000
COMP
RDROOP
VDROOP
FB
IDROOP
E/A
Σ
DAC
VDAC
INTERNAL TO IC
X1
VCCSENSE
VR LOCAL
VO
“CATCH”
RESISTOR
VIDS
VID<0:6>
RTN
VSS
VSSSENSE
“CATCH”
RESISTOR
FIGURE 9. DIFFERENTIAL SENSING AND LOAD LINE
IMPLEMENTATION
As the load current increases from zero, the output
voltage will droop from the VID table value by an
amount proportional to the load current to achieve the
load line. The ISL62883 can sense the inductor current
through the intrinsic DC Resistance (DCR) resistance of
the inductors Figure 1 shows on page 10 or through
resistors in series with the inductors as Figure 2 shows
also on page 10. In both methods, capacitor Cn voltage
represents the inductor total currents. A droop amplifier
converts Cn voltage into an internal current source with
the gain set by resistor Ri. The current source is used
for load line implementation, current monitor and
overcurrent protection.
14
FN6891.2
February 25, 2010
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