ISL6420 Datasheet, PDF (4/19 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6420
Typical 12V Input DC/DC Application Schematic
12V
C1
C2
C3
C4
C5
VIN PVCC
VCC5
D1
OCSET ^R1
ENSS
RT
MONITOR AND
PROTECTION
BOOT
Q1
PGOOD
R2
OSC
C7
CDEL
UGATE
C9
PHASE
C8
REF
SGND
--
FB
++
--
+
+
LGATE
Q2
PGND
R3
R4
COMP
C11
R5 C12
GPIO1/REFIN
GPIO2
R6 _REFOUT
C13
VMSET/MODE
C6
L1
C10
3.3V
Typical 5V Input DC/DC Application Schematic
5V
C1
C2
C3
C4
C5
VIN PVCC
VCC5
D1
OCSET ^R1
SS/EN
RT
MONITOR AND
PROTECTION
BOOT
Q1
CDEL
OSC
UGATE
C8
C7
R2
PGOOD
PHASE
REF
SGND
--
FB
++
--
+
+
LGATE
Q2
PGND
C6
L1
C9
R3
R4
COMP
C10
C11 R5
VMSET/MODE
VCC5
GPIO1/REFIN <-- VREF=VDDQ/2
GPIO2
REFOUT
C12
1.25V VREF
TO REFIN OF VTT SUPPLY
2.5V/1.25V
CONFIGURATION FOR DDR TERMINATION/EXTERNALLY REFERENCED TRACKING APPLICATIONS
4
FN9151.4
July 18, 2005