DATASHEET ISL6443A FN6600 Rev 3.00 300kHz Dual, 180 Out-of-Phase, Step-Down PWM and Single Linear Controller Sep 4, 2015 The ISL6443A is a high-performance, triple-output controller Features optimized for converting wall adapter, battery or network Wide Input Supply Voltage Range intermediate bus DC input supplies into the system supply - Variable 5.6V to 24V voltages required for a wide variety of applications. Each - Fixed 4.5V to 5.6V output is adjustable down to 0.8V. The two PWMs are synchronized at 180 out-of-phase, thus reducing the RMS Three Independently Programmable Output Voltages input current and ripple voltage. Switching Frequency . 300kHz The ISL6443A incorporates several protection features. An Out-of-Phase PWM Controller Operation adjustable overcurrent protection circuit monitors the output - Reduces Required Input Capacitance and Power current by sensing the voltage drop across the lower Supply Induced Loads MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output No External Current Sense Resistor overload/short circuit conditions. Each PWM has an - Uses Lower MOSFETs r DS(ON) independent logic-level shutdown input (SD1 and SD2). Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443As A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of Programmable Soft-Start the set point and the linear regulator output is greater than Extensive Circuit Protection Functions 75% of its setpoint. Thermal shutdown circuitry turns off the - PGOOD device if the junction temperature exceeds +150C. -UVLO Ordering Information - Overcurrent - Over-temperature PART TEMP. NUMBER PART RANGE PACKAGE PKG. - Independent Shutdown for Both PWMs (Note) MARKING (C) (Pb-Free) DWG. Excellent Dynamic Response ISL6443AIRZ* 6443A IRZ -40 to +85 28 Ld 5x5 QFN L28.5x5 - Voltage Feed-Forward with Current Mode Control ISL6443AIVZ* 6443A IVZ -40 to +85 28 Ld TSSOP M28.173 (No longer QFN Packages: available, - QFN - Compliant to JEDEC PUB95 MO-220 recommended QFN - Quad Flat No Leads - Package Outline replacement: - Near Chip Scale Package Footprint, which Improves ISL6443AIRZ) PCB Efficiency and has a Thinner Profile Add -TK suffix for tape and reel. Please refer to TB347 for details on reel specifications. Pb-Free (RoHS Compliant) NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach Applications materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Power Supplies with Multiple Outputs Pb-free soldering operations). Intersil Pb-free products are MSL xDSL Modems/Routers classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. DSP, ASIC, and FPGA Power Supplies Set-Top Boxes Dual Output Supplies for DSP, Memory, Logic, P Core and I/O Telecom Systems FN6600 Rev 3.00 Page 1 of 20 Sep 4, 2015ISL6443A Pinouts ISL6443A ISL6443A (28 LD QFN) (28 LD TSSOP) TOP VIEW TOP VIEW LGATE2 1 28 LGATE1 BOOT2 2 27 BOOT1 28 27 26 25 24 23 22 UGATE2 3 26 UGATE1 PHASE2 1 21 ISEN1 PHASE2 4 25 PHASE1 ISEN2 PGND ISEN2 5 24 ISEN1 2 20 PGOOD 6 23 PGND PGOOD 3 19 SD1 VCC 5V 7 22 SD1 VCC 5V 4 18 SS1 21 SS1 SD2 8 SS2 9 20 SGND 5 17 SGND SD2 OCSET2 10 19 OCSET1 SS2 6 16 OCSET1 FB2 11 18 FB1 7 15 OCSET2 FB1 SGND 12 17 SGND VIN 13 16 GATE3 8 9 10 11 12 13 14 SYNC 14 15 FB3 FN6600 Rev 3.00 Page 2 of 20 Sep 4, 2015 FB2 UGATE2 SGND BOOT2 VIN LGATE2 SYNC LGATE1 FB3 BOOT1 GATE3 UGATE1 SGND PHASE1