isl62881 Intersil Corporation, isl62881 Datasheet - Page 14

• Manufacturer Part Number: isl62881
• Description: Single-phase Pwm Regulator For Imvp-6.5? Mobile Cpus And Gpus
• Manufacturer: Intersil Corporation

VID6 VID5 VID4 VID3 VID2 VID1 VID0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
TABLE 1. VID TABLE (Continued)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
14
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
ISL62881, ISL62881B
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0.6625
0.6500
0.6375
0.6250
0.6125
0.6000
0.5875
0.5750
0.5625
0.5500
0.5375
0.5250
0.5125
0.5000
0.4875
0.4750
0.4625
0.4500
0.4375
0.4250
0.4125
0.4000
0.3875
0.3750
0.3625
0.3500
0.3375
0.3250
0.3125
0.3000
0.2875
0.2750
0.2625
0.2500
0.2375
0.2250
0.2125
0.2000
0.1875
0.1750
(V)
V
O
FIGURE 12. DIFFERENTIAL SENSING AND LOAD LINE
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 ISL62881 can sense the inductor current through the
intrinsic DC Resistance (DCR) resistance of the inductors
as shown in Figure 1 or through resistors in series with
the inductors as shown in Figure 2. In both methods,
capacitor C
currents. A droop amplifier converts C
internal current source with the gain set by resistor R
VID6 VID5 VID4 VID3 VID2 VID1 VID0
COMP
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
INTERNAL TO IC
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
E/A
TABLE 1. VID TABLE (Continued)
n
IMPLEMENTATION
voltage represents the inductor total
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FB
Σ
I
VDAC
DROOP
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
R
V
DROOP
DROOP
DAC
X 1
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
VIDS
RTN
VSS
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
n
RESISTOR
RESISTOR
“CATCH”
“CATCH”
voltage into an
VR LOCAL VO
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
VCC
October 26, 2009
VID<0:6>
VSS
SENSE
SENSE
0.1625
0.1500
0.1375
0.1250
0.1125
0.1000
0.0875
0.0750
0.0625
0.0500
0.0375
0.0250
0.0125
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
FN6924.0
(V)
V
O
i
.