ISL6440 Intersil Corporation, ISL6440 Datasheet - Page 3

• Manufacturer Part Number: ISL6440
• Description: Step-Down PWM Controller
• Manufacturer: Intersil Corporation

Block Diagram
SS1
BOOT1
UGATE1
PHASE1
VCC_5V
LGATE1
PGND
FB1
ISEN1
OCSET1
FB3
+ 0.8V
REF
CURRENT
SAMPLE
180kΩ
+
1400kΩ
+
-
ADAPTIVE DEAD-TIME
0.8V REFERENCE
V/I SAMPLE TIMING
DIODE EMULATION
-
+
18.5pF
ERROR AMP 1
CURRENT
SAMPLE
16kΩ
-
+
-
+
OVERCURRENT FAULT
REQUIRED TO LATCH
PGOOD
SAME STATE FOR
2 CLOCK CYCLES
PGOOD
UV
PWM1
OC1
SD1
PWM CHANNEL PHASE CONTROL
DUTY CYCLE RAMP GENERATOR
VIN
OC1
BIAS SUPPLIES
FAULT LATCH
REFERENCE
SOFT-START
VIN
ENABLE
POR
SGND
OC2
VCC
OVERCURRENT FAULT
REQUIRED TO LATCH
SD2
SAME STATE FOR
2 CLOCK CYCLES
OC2
PWM2
PGOOD
VCC
UV
-
+
-
+
16kΩ
CURRENT
SAMPLE
ERROR AMP 2
ADAPTIVE DEAD-TIME
DIODE EMULATION
V/I SAMPLE TIMING
0.8V REFERENCE
18.5pF
+
-
1400kΩ
-
+
+
PGND
180kΩ
CURRENT
SAMPLE
+
0.8V
REF
UGATE2
PHASE2
OCSET2
LGATE2
BOOT2
VSEN2
SOFT2
ISEN2
VCC