ISL6568_06 Datasheet, PDF (3/29 Pages) Intersil Corporation – Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications

Block Diagram
ICOMP OCSET
ISL6568
PGOOD
ENLL
ISUM
IREF
ISEN AMP
100µA
OC
RGND
VSEN
VDIFF
VID4
VID3
VID2
VID1
VID0
VID12.5
REF
FB
COMP
OFS
x1
x1
+1V
SOFT START
AND
FAULT LOGIC
UVP
OVP
OVP
V_OVP
+150mV
x 0.82
DYNAMIC
VID
D/A
0.2V
CLOCK AND
SAWTOOTH
GENERATOR
∑
PWM1
∑
PWM2
E/A
OFFSET
CHANNEL
CURRENT
BALANCE
CHANNEL
CURRENT
SENSE
1
N
∑
0.66V
POWER-ON
RESET
GATE
CONTROL
LOGIC
SHOOT-
THROUGH
PROTECTION
GATE
CONTROL
LOGIC
SHOOT-
THROUGH
PROTECTION
PHASE 2
DETECT
ISEN1 ISEN2
GND
3
VCC
PVCC
BOOT1
UGATE1
PHASE1
LGATE1
FS
BOOT2
UGATE2
PHASE2
LGATE2
FN9187.4
March 9, 2006