ISL6553 Datasheet, PDF (2/15 Pages) Intersil Corporation – Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller

Block Diagram
ISL6553
PGOOD
VCC
VSEN
X 0.9
X1.15
+
UV
-
+
OVP
-
OV
LATCH
S
POWER-ON
RESET (POR)
CLOCK AND
SAWTOOTH
GENERATOR
THREE
STATE
FS/EN
COMP
SOFT-
START
AND FAULT
LOGIC
+∑
-
VID3
VID2
VID1
VID0
VID25mV
FB
+_∑
-
D/A
+
E/A
-
I_TOT
CURRENT
CORRECTION
+
OC
-
+
∑
+
I_TRIP
GND
Simplified Power System Diagram
VSEN
ISL6553
PWM 1
PWM 2
VID
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
+
PWM
-
+
PWM
-
PWM1
PWM2
ISEN1
ISEN2
MICROPROCESSOR
2