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| 300kHz Dual, 180° Out-of-Phase, Step-Down PWM Controller |
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Available in RoHS/Pb-Free
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 Buy direct from Intersil
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 Check distributor inventory
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 Request samples
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL6440EVAL1Z |
Active |
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Eval Board |
N/A |
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| ISL6440IAZ |
Active |
Ind |
24 Ld QSOP |
2 |
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| ISL6440IAZ-T |
Active |
Ind |
24 Ld QSOP T+R |
2 |
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| ISL6440IAZ-TK |
Active |
Ind |
24 Ld QSOP T+R |
2 |
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| ISL6440EVAL1 |
InActive |
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Eval Board |
N/A |
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| ISL6440IA |
InActive |
Ind |
24 Ld QSOP |
2 |
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| ISL6440IA-T |
InActive |
Ind |
24 Ld QSOP T+R |
2 |
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| ISL6440IA-TK |
InActive |
Ind |
24 Ld QSOP T+R |
2 |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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The ISL6440 is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC input 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 180o out of phase reducing the RMS input current and ripple voltage.
The ISL6440 incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent 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 device if the junction temperature exceeds +150°C. |
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 Key Features |
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Wide Input Supply Voltage Range
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Two Independently Programmable Output Voltages
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Switching Frequency 300kHz
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Out of Phase PWM Controller Operation
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Reduces Required Input Capacitance and Power Supply Induced Loads
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No External Current Sense Resistor
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Uses Lower MOSFET’s rDS(ON)
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Programmable Soft-Start
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Extensive Circuit Protection Functions
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PGOOD
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UVLO
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Overcurrent
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Overtemperature
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Independent Shutdown for Both PWMs
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Excellent Dynamic Response
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Voltage Feed-Forward with Current Mode Control
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Pb-Free Plus Anneal Available (RoHS Compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Evaluation Board(s): |
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 Technical Homepage: |
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 i-Sim: |
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 Parametric Data |
| | VIN (min) (V) | | 4.5 | | | VIN (max) (V) | | 24 | | | VOUT (min) (V) | | .8 | | | VOUT (max) (V) | | 24 | | | IOUT (max) (A) | | 10 | | | Switching Freq. (kHz) | | 300 | |
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 Application Block Diagrams |
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| Applications |
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- 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
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| | ISL6225 | | Dual Mobile-Friendly PWM Controller with DDR Memory Option | | | | ISL6227 | | Dual Mobile-Friendly PWM Controller with DDR Option | | | | ISL6228 | | High-Performance Dual-Output Buck Controller for Notebook Applications | | | | ISL6406 | | Single Synchronous Buck Pulse-Width Modulation (PWM) Controller | | | | ISL6443 | | 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL6443A | | 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL6445 | | 1.4MHz Dual, 180° Out-of-Phase, Step-Down PWM Controller | | | | ISL6521 | | PWM Buck DC/DC and Triple Linear Power Controller | | | | ISL6530 | | Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and VTTTermination | | | | ISL6531 | | Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and VTT Termination | | | | ISL6539 | | Wide Input Range Dual PWM Controller with DDR Option | | | | ISL8112 | | High Light-Load Efficiency, Dual-Output, Main Power Supply Controllers | |
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