isl6260c Intersil Corporation, isl6260c Datasheet - Page 15

• Manufacturer Part Number: isl6260c
• Description: Multiphase Pwm Regulator For Imvp-6 Mobile Cpus
• Manufacturer: Intersil Corporation

Simplified Application Circuit for Resistive Current Sensing
Figure 40 shows a simplified application circuit for the
ISL6260C converter with external resistor current sensing. A
capacitor is added in parallel with RL in order to improve the
REMOTE SENSE
AT CPU CORE
PWR MONITOR
CLK_ENABLE#
VID<0:6>
IMVP6_PWRGD
VR_TT#
VR_ON
FIGURE 40. TYPICAL APPLICATION CIRCUIT FOR DISCRETE RESISTOR CURRENT SENSING
7
C
C
C
1
2
3
R
i
R
R
15
R
3
1
FSET
GND
RBIAS
NTC
VR_TT#
SOFT
VIDs
DPRSTP#
DPRSLPVR
PSI#
PMON
CLK_EN#
VR_ON
PGOOD
VSEN
RTN
VDIFF
FB
COMP
VW
VDD
V
ISL6260C
DFB
+5
V
3V3
+3.3
DROOP
OCSET
V
VIN
PWM1
PWM2
PWM3
ISEN1
ISEN2
FCCM
ISEN3
VSUM
IN
VO
ISL6260C
VSUM
stability margin of the channel current balance loop. No NTC
thermistor is needed and the droop circuit is simplified.
VO'
PWM
FCCM
PWM
FCCM
PWM
FCCM
ISL6208
ISL6208
ISL6208
VCC
GND
VCC
GND
VCC
GND
UGATE
UGATE
UGATE
PHASE
LGATE
PHASE
LGATE
PHASE
LGATE
V
V
V
BOOT
BOOT
BOOT
+5
+5
+5
V
V
V
IN
IN
IN
L
L
L
O
O
O
VSUM
ISEN1
VSUM
ISEN2
VSUM
ISEN3
VO'
VO'
VO'
R
R
R
C
C
C
R
R
R
L
L
L
L
L
L
SEN
SEN
SEN
March 6, 2009
V
O
FN9259.2
C
O