ISL6420 Datasheet, PDF (5/19 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6420
Typical 12V Input DC/DC Application Schematic
12V
C7
C1
R2
R3
C6
C2
C3
C4
C5
VIN PVCC
VCC5
D1
SS/EN
RT
MONITOR AND
PROTECTION
OCSET ^R1
BOOT
Q1
CDEL
OSC
UGATE
C8
PGOOD
REF
PHASE
SGND
--
FB
++
--
+
+
LGATE
Q2
PGND
L1
C9
COMP
C10
C11 _R5
R4
VMSET/MODE
VCC5
GPIO1/REFIN <-- VREF=VDDQ/2
GPIO2
REFOUT
C12
1.25V VREF
TO REFIN OF VTT SUPPLY
CONFIGURATION FOR DDR TERMINATION/EXTERNALLY REFERENCED TRACKING APPLICATIONS
2.5V/1.25V
VDDQ/VTT
5
FN9151.4
July 18, 2005