ISL6263 INTERSIL [Intersil Corporation], ISL6263 Datasheet - Page 15

• Manufacturer Part Number: ISL6263
• Description: 5-Bit VID Single-Phase Voltage Regulator for IMVP-6+ Santa Rosa GPU Core
• Manufacturer: INTERSIL [Intersil Corporation]

The gain of the droop amplifier circuit is Equation 14:
After determining R
Equation 15 to calculate the droop resistances R
R
k
R
droopamp
DRP2
DRP2
.
=
⎛
⎜
⎝
⎛
⎜
⎝
=
------------------------------------------ -
DCR G
1
FIGURE 9. EQUIVALENT MODEL FOR DROOP CIRCUIT USING DISCRETE RESISTOR CURRENT SENSING
+
R
R
-------------------
R
FIGURE 8. EQUIVALENT MODEL FOR DROOP CIRCUIT USING INDUCTOR DCR CURRENT SENSING
⋅
droop
DRP2
DRP1
S
1 25°C
(
and R
)
⎞
⎟
⎠
NTCEQ
–
15
1
⎞
⎟
⎠
⋅
R
OCP
OCP
DRP1
networks, use
−
+
+
−
−
+
+
−
10µA
10µA
DROOP
DROOP
↓
↓
DRP1
−
+
+
−
(EQ. 14)
(EQ. 15)
DROOP
DROOP
OCSET
OCSET
VSUM
VSUM
and
VDD
DFB
VDD
DFB
VO
VO
ISL6263
R
R
OCSET
OCSET
R
typically 1kΩ.
The effectiveness of the R
coupling coefficient between the NTC thermistor and the
inductor. The NTC thermistor should be placed in the closet
proximity of the inductor.
droop
is 8mΩ per Intel IMVP-6+ specification and R
R
R
S
S
NTCEQ
V
RSNS
V
DCR
network is sensitive to the
June 10, 2010
DRP1
FN9213.2
is