isl6260c Intersil Corporation, isl6260c Datasheet - Page 14

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

Simplified Application Circuit for DCR Current Sensing
Figure 39 shows a simplified application circuit for the
ISL6260C converter with inductor DCR current sensing. The
ISL6208 MOSFET gate driver has a force-continuous-
conduction-mode (FCCM) input, that when disabled, allows
REMOTE SENSE
AT CPU CORE
PWR MONITOR
DPRSLPVR
DPRSTP#
CLK_ENABLE#
VID<0:6>
VR_TT#
IMVP6_PWRGD
VR_ON
PSI#
7
C
C
C
14
1
2
3
R
i
R
R
R
FIGURE 39. TYPICAL APPLICATION CIRCUIT FOR DCR SENSING
3
1
FSET
RBIAS
NTC
VR_TT#
SOFT
VIDs
DPRSTP#
DPRSLPVR
PSI#
PMON
CLK_EN#
VR_ON
PGOOD
VSEN
RTN
VDIFF
FB
COMP
VW
GND
VDD
V
ISL6260C
DFB
+5
V
VIN
DROOP
IN
V
3V3
+3.3
OCSET
PWM1
PWM2
PWM3
ISEN1
ISEN2
FCCM
ISEN3
VSUM
ISL6260C
VO
R
N
VSUM
the regulator to operate in Diode Emulation for improved
light load efficiency. As shown in the circuit diagram, the
FCCM pin is connected to ISL6260C, which programs the
CCM or DCM mode.
VO'
C
CS
PWM
FCCM
PWM
FCCM
PWM
FCCM
ISL6208
ISL6208
ISL6208
VCC
GND
VCC
GND
VCC
GND
UGATE
PHASE
UGATE
PHASE
UGATE
PHASE
LGATE
LGATE
LGATE
V
V
V
BOOT
BOOT
BOOT
+5
+5
+5
V
V
V
IN
IN
IN
VSUM
VSUM
VSUM
R
R
R
L
L
L
ISEN1
ISEN2
ISEN3
L
L
L
C
C
C
O
O
O
L
L
L
VO'
VO'
VO'
March 6, 2009
V
FN9259.2
O
C
O