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ISL6443IRZ Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6443IRZ Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 18 page 1 ® FN9044.2 ISL6443 300kHz Dual, 180° Out-of-Phase, Step- Down PWM and Single Linear Controller The ISL6443 is a high-performance, triple-output 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 180° out of phase reducing the RMS input current and ripple voltage. The ISL6443 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 and the linear regulator output is greater than 75% of its setpoint. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C. Features • Wide Input Supply Voltage Range - Variable 5.6V to 24V - Fixed 4.5V to 5.6V • Three 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 rDS(ON) • Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443s • Programmable Soft-Start • Extensive circuit protection functions - PGOOD -UVLO - Overcurrent - Over-temperature - Independent Shutdown for Both PWMs • Excellent Dynamic Response - Voltage Feed-Forward with Current Mode Control • QFN Packages: - QFN - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline - Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile • Pb-Free Plus Anneal Available (RoHS Compliant) Applications • Power Supplies with Multiple 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 Ordering Information PART NUMBER PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. # ISL6443IR ISL6443IR -40 to 85 28 Ld 5x5 QFN L28.5x5 ISL6443IRZ (See Note) ISL6443IRZ -40 to 85 28 Ld 5x5 QFN (Pb-free) L28.5x5 Add “-T” or “-TK” suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Data Sheet August 9, 2006 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2005-2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
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