ISL6439IR Intersil, ISL6439IR Datasheet - Page 4

• Manufacturer Part Number: ISL6439IR
• Description: IC CTRLR PWM SYNC BUCK 16-QFN
• Manufacturer: Intersil

Specifications of ISL6439IR

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 340kHz
• Duty Cycle: 100%
• Voltage - Supply: 3.3 V ~ 5 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Frequency-max: 340kHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Application - 5V Input
Block Diagram
CPGND
OCSET
COMP
DISABLE
CT1
CT2
FB
+5V
V
IN
0.8V
20μA
+
-
N/C
4
CHARGE
PUMP
VCC
CT1
CT2
CPGND
GND
ENABLE
ERROR
COMP
AMP
+
-
ISL6439
R
F
COMPARATOR
FIXED 300kHz or 600kHz
VCC
C
I
ISL6439, ISL6439A
+
-
C
OC
OSCILLATOR
COMPARATOR
F
FB
CPVOUT
OCSET
UGATE
PHASE
PWM
LGATE
BOOT
R
+
-
OFFSET
D
C
BOOT
BOOT
RESET (POR)
SOFTSTART
POWER-ON
CPVOUT
R
PWM
FB
R
OCSET
GND
CONTROL
LOGIC
GATE
C
IN
Q
Q
1
2
C
C
HF
BULK
L
OUT
C
OUT
BOOT
ENABLE
UGATE
PHASE
LGATE
November 5, 2008
V
OUT
FN9057.5