DATASHEET ISL6333, ISL6333A, ISL6333B, ISL6333C FN6520 Rev 3.00 Three-Phase Buck PWM Controller with Integrated MOSFET Drivers and Light Oct 8, 2010 Load Efficiency Enhancements for Intel VR11.1 Applications The ISL6333 three-phase PWM family of control ICs provide a Features precision voltage regulation system for advanced Intel VR11.1 Compatible microprocessors. The integration of power MOSFET drivers - IMON Pin for Output Current Monitoring into the controller IC marks a departure from the separate PWM - Power State Indicator (PSI ) Pin for Phase Dropping controller and driver configuration of previous multi-phase and Higher Efficiency During Light Load States product families. By reducing the number of external parts, this integration is optimized for a cost and space saving power CPURST N Input to Eliminate Required Extensive management solution. External Circuit for proper PSI Operation of Intels Eaglelake Chipset Platform (ISL6333B, ISL6333C Only) The ISL6333 controllers are designed to be compatible with Integrated Multi-Phase Power Conversion Intel VR11.1 Applications. Features that make these controllers compatible include an IMON pin for output current monitoring, - 3-Phase or 2-Phase Operation with Internal Drivers and a Power State Indicator (PSI ) pin for phase dropping and Precision Core Voltage Regulation higher efficiency during light load states. An 8-bit VID input is - Differential Remote Voltage Sensing used to select the desired output voltage from the VR11 DAC - 0.5% System Accuracy Over-Temperature table. A circuit is provided for remote voltage sensing, - Adjustable Reference-Voltage Offset compensating for any potential difference between remote and local grounds. The output voltage can also be positively or Optimal Transient Response negatively offset through the use of a single external resistor. - Active Pulse Positioning (APP) Modulation - Adaptive Phase Alignment (APA) The ISL6333 controllers also include advanced control loop features for optimal transient response to load application and Fully Differential, Continuous DCR Current Sensing removal. One of these features is highly accurate, fully - Integrated Programmable Current Sense Resistors differential, continuous DCR current sensing for load line - Accurate Load Line Programming programming and channel current balance. Active Pulse - Precision Channel Current Balancing Positioning (APP) Modulation and Adaptive Phase Alignment Gate Voltage Optimization Technology (ISL6333, (APA) are two other unique features, allowing for quicker initial ISL6333B Only) response to high di/dt load transients. With this quicker initial response to load transients, the number of output bulk Power Saving Diode Emulation Mode (ISL6333, ISL6333B capacitors can be reduced, helping to reduce cost. Only) Integrated into the ISL6333 controllers are user-programmable Optimized for use with Coupled Inductors current sense resistors, which require only a single external Variable Gate Drive Bias: +5V to +12V resistor to set their values. No external current sense resistors Microprocessor Voltage Identification Inputs are required. Another unique feature of the ISL6333 controllers - 8-bit VID Input for Selecting VR11 DAC Voltages is the addition of a dynamic VID compensation pin that allows optimizing compensation to be added for well-controlled - Dynamic VID Technology dynamic VID response. Dynamic VID Compensation Protection features of these controller ICs include a set of Overcurrent Protection and Channel Current Limit sophisticated overvoltage, undervoltage, and overcurrent Multi-tiered Overvoltage Protection protection. Furthermore, the ISL6333 controllers include protection against an open circuit on the remote sensing inputs. Digital Soft-Start Combined, these features provide advanced protection for the Selectable Operation Frequency up to 1.0MHz Per Phase microprocessor and power system. Pb-free (RoHS Compliant) FN6520 Rev 3.00 Page 1 of 40 Oct 8, 2010ISL6333, ISL6333A, ISL6333B, ISL6333C Ordering Information PART NUMBER PART TEMP. RANGE PACKAGE PKG. (Note) MARKING (C) (Pb-free) DWG. ISL6333CRZ* ISL6333 CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6333IRZ* ISL6333 IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7 ISL6333ACRZ* ISL6333A CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6333AIRZ* ISL6333A IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7 ISL6333BCRZ* ISL6333B CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6333BIRZ* ISL6333B IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7 ISL6333CCRZ* ISL6333C CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6333CIRZ* ISL6333C IRZ -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. Pinouts ISL6333 (48 LD QFN) TOP VIEW 48 47 46 45 44 43 42 41 40 39 38 37 1 36 RSET VR RDY 2 35 OFS EN FS 3 34 PUVCC 4 33 SS PHASE2 VCC 5 32 UGATE2 6 31 REF BOOT2 GND (PIN 49) 7 30 APA LGATE2 8 29 COMP PVCC2 3 DVC 9 28 LGATE3 FB 10 27 BOOT3 IDROOP 11 26 UGATE3 VDIFF 12 25 PHASE3 13 14 15 16 17 18 19 20 21 22 23 24 FN6520 Rev 3.00 Page 2 of 40 Oct 8, 2010 RGND ISEN1+ VSEN ISEN1- IMON ISEN2+ PSI ISEN2- VID7 ISEN3+ VID6 ISEN3- VID5 PVCC1 VID4 BYP1 VID3 LGATE1 VID2 BOOT1 VID1 UGATE1 VID0 PHASE1