ISL6526 Datasheet, PDF (4/15 Pages) Intersil Corporation – Single Synchronous Buck Pulse-Width Modulation PWM Controller

Block Diagram
VCC
ISL6526, ISL6526A
CPVOUT
CT1
CT2
CPGND
OCSET
CHARGE
PUMP
20µA
+
-
OC
COMPARATOR
POWER-ON
RESET (POR)
SOFT-START
+
0.8V
-
ERROR
AMP
+
-
PWM
COMPARATOR
+
-
GATE
CONTROL
PWM ^LOGIC
FB
COMP
OSCILLATOR
FIXED 300kHz OR 600kHz
GND
ENABLE
BOOT
UGATE
PHASE
LGATE
4
FN9055.10
November 24, 2008