ISL6312A Datasheet, PDF (33/35 Pages) Intersil Corporation – Four-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR10, VR11, and AMD Applications

ISL6312A
C₂
C₁
R₁
FB
COMP
+5V
(CF1)
VSEN
RGND
VCC
R_OFS
OFS
FS
R_T
REF
C_REF
SS
R_SS
OVPSEL
+12V
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VRSEL
PGOOD
R_EN1
EN
R_EN2
DRSEL
R_DR
IOUT
R_IOUT
GND
R_FB
LOCATE CLOSE TO IC
(MINIMIZE CONNECTION PATH)
VDIFF
BOOT1
UGATE1
C_BOOT1
PHASE1
+12V
LGATE1
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
ISEN1-
ISEN1+
PVCC1_2
BOOT2
UGATE2
PHASE2
LGATE2
ISL6312A
ISEN2-
ISEN2+
PVCC3
BOOT3
UGATE3
PHASE3
LGATE3
+12V
(CF2)
C_BOOT2
+12V
(CF2)
C_BOOT3
C_BIN2
C_BIN3
R₁ C₁
(C_HFOUT) C_BOUT
LOAD
LOCATE NEAR LOAD;
(MINIMIZE CONNECTION
PATH)
R₁ C₁
ISEN3-
ISEN3+
+12V
EN_PH4
PWM4
BOOT
VCC UGATE
PVCC
PHASE
ISL6612
LGATE
PWM _GND
+12V
C_BIN4
R₁ C₁
ISEN4-
ISEN4+
FIGURE 25. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS
33
FN9290.4
April 29, 2010