ISL6312A Datasheet, PDF (3/35 Pages) Intersil Corporation – Four-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR10, VR11, and AMD Applications

Block Diagram
VSEN
RGND
VDIFF
OPEN SENSE
LINE PREVENTION
x1
UNDERVOLTAGE
DETECTION
LOGIC
ISL6312A
PGOOD SS
SOFT-START
AND
FAULT LOGIC
OVERVOLTAGE
DETECTION
LOGIC
0.2V
EN
0.85V
POWER-ON
RESET
MOSFET
DRIVER
VCC
PVCC1_2
BOOT1
UGATE1
PHASE1
LGATE1
OVPSEL
LOAD APPLY
TRANSIENT
ENHANCEMENT
VRSEL
MODE / DAC
SELECT
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
REF
FB
COMP
OFS
DYNAMIC
VID
D/A
OFFSET
IOUT
x1
OC
I_TRIP
E/A
I_AVG
OCP
CLOCK AND
MODULATOR
WAVEFORM
GENERATOR
∑
∑
∑
∑
PWM1
PWM2
PWM3
PWM4
CHANNEL
CURRENT
BALANCE
I_AVG ₁
N
∑
V_OCP
CH1
CURRENT
SENSE
CH2
CURRENT
SENSE
CH3
CURRENT
SENSE
CH4
CURRENT
SENSE
ISEN1- ISEN1+ ISEN2- ISEN2+ ISEN3- ISEN3+ ISEN4- ISEN4+
3
MOSFET
DRIVER
CHANNEL
DETECT
PH4 POR/
DETECT
MOSFET
DRIVER
PWM4
SIGNAL
LOGIC
GND
DRSEL
FS
BOOT2
UGATE2
PHASE2
LGATE2
EN_PH4
PVCC3
BOOT3
UGATE3
PHASE3
LGATE3
PWM4
FN9290.4
April 29, 2010