isl9444 Intersil Corporation, isl9444 Datasheet - Page 5

• Manufacturer Part Number: isl9444
• Manufacturer: Intersil Corporation

Block Diagram
OCSET1
EN/SS1
ISEN1
PGND
BOOT1
UGATE1
PHASE1
LGATE1
PFI
PFO
FB1
VCC_5V
PF REF
+ 0.7V
CURRENT
+
SAMPLE
REF
1.3V
180kΩ
PGND
+
_
+
1000kΩ
1.55µA
1.75V REFERENCE
+
_
ADAPTIVE DEAD-TIME
V/I SAMPLE TIMING
_
+
CHANNEL 1
ERROR AMP 1
15pF
EN/SS1
CURRENT
VCC_5V
SAMPLE
16kΩ
PGOOD1
-
+
_
+
PGOOD2
OVERCURRENT FAULT
PWM1
REQUIRED TO LATCH
OC1
2
SAME STATE FOR
CLOCK CYCLES
PGOOD3
2µA
PWM CHANNEL PHASE CONTROL
DUTY CYCLE RAMP GENERATOR
OC1
PG3_DLY
VIN
BIAS SUPPLIES
FAULT LATCH
OCP
OC2
REFERENCE
(see Note 6)
VCC_5V
ENABLE
POR
OC3
VIN
VCC_5V
FB1
FB2
OV
EN/SS1
EN2
EN3
FB3
SGND
+
_
SW THRES.
EXTBIAS
PWM3
PWM2
OC3
OC2
ADAPTIVE DEAD-TIME
ADAPTIVE DEAD-TIME
V/I SAMPLE TIMING
V/I SAMPLE TIMING
VCC_5V
VCC_5V
ERROR AMP 3
CHANNEL 3
CHANNEL 2
SOFT-START
+
_
MINIMUM
PGND
PGND
0.7V REF
UGATE2
PHASE2
UGATE3
PHASE3
VCC_5V
LGATE2
LGATE3
VCC_5V
TK/SS3
OCSET3
OCSET2
BOOT2
BOOT3
TK/SS2
ISEN3
ISEN2
EN3
EN3
FB3
FB2