ISL6440IAZ

Number of Outputs :
Topology :
Output Voltage :
Output Current :
Switching Frequency :
Duty Cycle (Max) :
Operating Supply Voltage :
Supply Current :
Maximum Operating Temperature :
Minimum Operating Temperature :
Package / Case :
Packaging : Tube


Features:

•Wide Input Supply Voltage Range  -5.6V to 24V  -4.5V to 5.6V
•Two Independently Programmable Output Voltages
•Switching Frequency . . . . . . . . . . . . . . . . . . . . . . .300kHz
•Out of Phase PWM Controller Operation  -Reduces Required Input Capacitance and Power  Supply Induced Loads
•No External Current Sense Resistor -Uses Lower MOSFET's r DS(ON)
•Programmable Soft-Start
•Extensive Circuit Protection Functions   -PGOOD   -UVLO  -Overcurrent  -Overtemperature  -Independent Shutdown for Both PWMs
•Excellent Dynamic Response  -Voltage Feed-Forward with Current Mode Control
•Pb-Free Plus Anneal Available (RoHS Compliant)


Application

•Power Supplies with Two Outputs
•xDSL Modems/Routers
•DSP, ASIC, and FPGA Power Supplies
•Set-Top Boxes
•Dual Output Supplies for DSP, Memory, Logic, µP Core and I/O
•Telecom Systems


Pinout




Specifications

Supply Voltage (VCC_5V Pin). . . . . . . . . . . . . . . . . . .    .-0.3V to +7V
Input Voltage (VIN Pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+27V
BOOT1, 2 and UGATE1, 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .    +35V
PHASE1, 2 and ISEN1, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .    +27V
BOOT1, 2 with Respect to PHASE1, 2 . . . . . . . . . . . . . . . . .   . +6.5V
UGATE1, 2. . . . . . . . . . . .     (PHASE1, 2 - 0.3V) to (BOOT1, 2 +0.3V)


Description

T  he ISL6440IAZ is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC in put supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized 180 o out of phase reducing the RMS input current and ripple voltage.

  The ISL6440IAZ incorporates seve ral protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurr ent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1 and SD2).

  A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point.  Thermal shutdown circuitry turns off the ISL6440IAZ if the junction temperature exceeds +150°C. 


Parameters:

Technical/Catalog Information	ISL6440IAZ
Vendor	Intersil
Category	Integrated Circuits (ICs)
PWM Type	Current Mode
Number of Outputs	2
Package / Case	24-QSOP
Packaging	Tube
Duty Cycle	93%
Voltage - Supply	4.5 V ~ 27 V
Frequency-Max	340kHz
Buck	Yes
Boost	No
Flyback	No
Inverting	No
Doubler	No
Divider	No
Cuk	No
Isolated	No
Drawing Number	*
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	ISL6440IAZ ISL6440IAZ