ISL6327CRZ Renesas

ISL6327 Data Sheet May 5, 2008 FN9276.4 Enhanced 6-Phase PWM Controller with Features 8-Bit VID Code and Differential Inductor Proprietary Active Pulse Positioning and Adaptive Phase DCR or Resistor Current Sensing Alignment Modulation Scheme The ISL6327 controls microprocessor core voltage regulation Precision Multiphase Core Voltage Regulation by driving up to 6 synchronous-rectified buck channels in - Differential Remote Voltage Sensing parallel. Multiphase buck converter architecture uses - 0.5% System Accuracy Over Life, Load, Line and interleaved timing to multiply channel ripple frequency and Temperature reduce input and output ripple currents. Lower ripple results in - Adjustable Precision Reference-Voltage Offset fewer components, lower component cost, reduced power Precision Resistor or DCR Current Sensing dissipation, and smaller implementation area. - Accurate Load-Line Programming Microprocessor loads can generate load transients with - Accurate Channel-Current Balancing extremely fast edge rates. The ISL6327 utilizes Intersils - Differential Current Sense proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation scheme to achieve the Microprocessor Voltage Identification Input extremely fast transient response with fewer output - Dynamic VID Technology capacitors. - 8-Bit VID Input with Selectable VR11 code and Extended VR10 Code at 6.25mV Per Bit Todays microprocessors require a tightly regulated output - 0.5V to 1.600V Operation Range voltage position versus load current (droop). The ISL6327 senses the output current continuously by utilizing patented Thermal Monitoring techniques to measure the voltage across the dedicated Integrated Programmable Temperature Compensation current sense resistor or the DCR of the output inductor. Current sensing provides the needed signals for precision Overcurrent Protection and Channel Current Limit droop, channel-current balancing, and overcurrent Overvoltage Protection with OVP Output Indication protection. A programmable integrated temperature 2, 3, 4, 5 or 6 Phase Operation compensation function is implemented to effectively compensate the temperature variation of the current sense Adjustable Switching Frequency up to 1MHz Per Phase element. The current limit function provides the overcurrent Package Option protection for the individual phase. - QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad A unity gain, differential amplifier is provided for remote Flat No Leads - Product Outline voltage sensing. Any potential difference between remote - QFN Near Chip Scale Package Footprint Improves and local grounds can be completely eliminated using the PCB Efficiency, Thinner in Profile remote-sense amplifier. Eliminating ground differences Pb-Free (RoHS Compliant) improves regulation and protection accuracy. The threshold- sensitive enable input is available to accurately coordinate Ordering Information the start-up of the ISL6327 with any other voltage rail. Dynamic-VID technology allows seamless on-the-fly VID PART changes. The offset pin allows accurate voltage offset NUMBER PART TEMP. PACKAGE PKG. (Note) MARKING (C) (Pb-Free) DWG. settings that are independent of VID setting. ISL6327CRZ* ISL6327CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6327IRZ* ISL6327IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7 *Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is 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. CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006-2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners.ISL6327 Pinout ISL6327 (48 LD QFN) TOP VIEW 48 47 46 45 44 43 42 41 40 39 38 37 1 36 VID7 PWM3 VID6 2 35 ISEN3+ VID5 3 34 ISEN3- 4 33 VID4 ISEN1- 5 32 VID3 ISEN1+ 6 31 VID2 PWM1 GND 7 30 VID1 PWM4 8 29 VID0 ISEN4+ 9 28 VRSEL ISEN4- 10 27 OFS ISEN2- 11 26 IOUT ISEN2+ 12 25 DAC PWM2 13 14 15 16 17 18 19 20 21 22 23 24 FN9276.4 2 May 5, 2008 REF TM COMP VR HOT FB VR FAN IDROOP VR RDY VDIFF OVP RGND SS VSEN FS TCOMP EN VTT VCC EN PWR ISEN5- ISEN6- ISEN5+ ISEN6+ PWM5 PWM6