ISL6568_06 Datasheet, PDF (28/29 Pages) Intersil Corporation – Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications

ISL6568
LOCATE CLOSE TO IC
C₂
(MINIMIZE CONNECTION PATH)
R_FB
VDIFF
C₁
FB
R₁
COMP
KEY
HEAVY TRACE ON CIRCUIT PLANE LAYER
ISLAND ON POWER PLANE LAYER
ISLAND ON CIRCUIT PLANE LAYER
VIA CONNECTION TO GROUND PLANE
+5V
(CF1)
VSEN
RGND
VCC
R_OFS
OFS
FS
R_T
REF
C_REF
+12V
VID4
VID3
VID2
VID1
VID0
VID12.5
PGOOD
GND
PVCC
BOOT1
UGATE1
C_BOOT1
+12V
LOCATE NEAR SWITCHING TRANSISTORS;
(MINIMIZE CONNECTION PATH)
(CF2)
C_BIN1
PHASE1
ISEN1
LGATE1
R_ISEN1
ISL6568
BOOT2
UGATE2
C_BOOT2
PHASE2
ISEN2
LGATE2
R_ISEN2
+12V
C_BIN2
C_BOUT (C_HFOUT)
LOAD
LOCATE NEAR LOAD;
(MINIMIZE CONNECTION PATH)
ENLL
IREF
OCSET
ICOMP
ISUM
R_COMP
R_OCSET
R_S
C_COMP
R_S
FIGURE 24. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS
28
FN9187.4
March 9, 2006