ISL6312_07 Datasheet, PDF (34/35 Pages) Intersil Corporation – Four-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR10, VR11, and AMD Applications

ISL6312
C₂
C₁
R_FB
LOCATE CLOSE TO IC
(MINIMIZE CONNECTION PATH)
+5V
(CF1)
R₁
FB
IDROOP
COMP
VSEN
RGND
VCC
R_OFS
VDIFF
BOOT1
UGATE1
C_BOOT1
PHASE1
LGATE1
+12V
OFS
FS
R_T
REF
C_REF
SS
R_SS
ISEN1-
ISEN1+
PVCC1_2
BOOT2
UGATE2
PHASE2
+12V
(CF2)
C_BOOT2
OVPSEL
+12V
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VRSEL
PGOOD
R_EN1
EN
R_EN2
R_DR
DRSEL
GND
ISL6312
LGATE2
ISEN2-
ISEN2+
PVCC3
BOOT3
UGATE3
PHASE3
LGATE3
ISEN3-
ISEN3+
EN_PH4
PWM4
ISEN4-
ISEN4+
+12V
(CF2)
C_BOOT3
+12V
BOOT
VCC UGATE
PVCC
PHASE
ISL6612
LGATE
PWM _GND
KEY
HEAVY TRACE ON CIRCUIT PLANE LAYER
ISLAND ON POWER PLANE LAYER
ISLAND ON CIRCUIT PLANE LAYER
VIA CONNECTION TO GROUND PLANE
C_BIN1
LOCATE NEAR SWITCHING TRANSISTORS;
(MINIMIZE CONNECTION PATH)
R₁ C₁
C_BIN2
R₁ C₁
(C_HFOUT) C_BOUT
LOAD
C_BIN3
LOCATE NEAR LOAD;
(MINIMIZE CONNECTION
PATH)
R₁ C₁
+12V
C_BIN4
R₁ C₁
FIGURE 26. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS
34
FN9289.3
February 14, 2007