OBSOLETE PRODUCT NO RECOMMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc DATASHEET ISL6336B FN6696 Rev 3.00 6-Phase PWM Controller with Light Load Efficiency Enhancement and Current May 5, 2016 Monitoring The ISL6336B controls microprocessor core voltage Features regulation by driving up to 6 interleaved synchronous-rectified Intel VR11.1 Compliant buck channels in parallel. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple H CPURST N Input to Eliminate Required Extensive frequency and reduce input and output ripple currents. Lower External Circuitry for Proper PSI Operation of Intels Eaglelake Chipset Platforms ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area. Proprietary Active Pulse Positioning and Pin Adaptive Phase Alignment Modulation Scheme Microprocessor loads can generate load transients with extremely fast edge rates and require high efficiency over Proprietary Active Phase Adding and Dropping with Diode the full load range. The ISL6336B utilizes Intersils Emulation for Enhanced Light Load Efficiency proprietary Active Pulse Positioning (APP) and Adaptive Precision Multiphase Core Voltage Regulation Phase Alignment (APA) modulation scheme and a - Differential Remote Voltage Sensing proprietary active phase dropping/adding and diode - 0.5% System Accuracy Over Life, Load, Line and emulation scheme to achieve extremely fast transient Temperature response with fewer output capacitors and high efficiency - Bi-Directional Adjustable Reference-Voltage Offset from light load to full load. Precision Resistor or DCR Current Sensing The ISL6336B is compliant with Intels VR11.1 specification. - Accurate Load-Line Programming Features include a pin (IMON) for current monitoring and a - Accurate Channel-Current Balancing Power State Indicator (PSI ) input pin to initiate a proprietary phase dropping and diode emulation scheme for higher - Accurate Current Monitoring Output Pin (IMON) efficiency at light load by dropping to 1- or 2-phase operation Microprocessor Voltage Identification Input with optional diode emulation to reduce switching and core - Dynamic VID Technology losses in the converter. After the PSI signal is de-asserted, - 8-Bit VID Input With VR11 Code the dropped phase(s) are added back to sustain heavy load transient and efficiency. Thermal Monitor and OV Protection with OVP Output Average Overcurrent Protection and Channel-Current Limit Todays microprocessors require a tightly regulated output voltage position versus load current (droop). The ISL6336B Precision Overcurrent Protection on IMON Pin senses the output current continuously by utilizing patented Integrated Open Sense Line Protection techniques to measure the voltage across a dedicated current sense resistor or the DCR of the output inductor. Integrated Programmable Temperature Compensation Current sensing provides the needed signals for precision 1- to 6-Phase Operation Coupled Inductor Compatible droop, channel-current balancing, and overcurrent protection. A programmable integrated temperature Adjustable Switching Frequency up to 1MHz Per Phase compensation function is implemented to effectively Package Option compensate the temperature variation of the current sense - QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad element. A current limit function provides overcurrent Flat No Leads - Product Outline protection for the individual phase. Pb-Free (RoHS Compliant) A unity gain, differential amplifier is provided for remote voltage sensing and eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start up of the ISL6336B with any other voltage rail. Dynamic VID technology allows seamless on-the-fly VID changes. The offset pin allows accurate voltage offset settings that are independent of VID setting. FN6696 Rev 3.00 Page 1 of 32 May 5, 2016ISL6336B Ordering Information PART NUMBER PART TEMP. RANGE PACKAGE PKG. (Notes 1, 2) MARKING (C) (RoHS Compliant) DWG. ISL6336BCRZ* ISL6336B CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7 ISL6336BIRZ* ISL6336B IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7 NOTES: 1. *Add -T for tape and reel. Please refer to TB347 for details on reel specifications. 2. 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. Pinout ISL6336B (48 LD QFN) TOP VIEW 48 47 46 45 44 43 42 41 40 39 38 37 VID7 1 36 PWM3 VID6 2 35 ISEN3- VID5 3 34 ISEN3+ VID4 4 33 ISEN1+ VID3 5 32 ISEN1- 6 31 VID2 PWM1 GND VID1 7 30 PWM4 VID0 8 29 ISEN4- 9 28 PSI ISEN4+ OFS 10 27 ISEN2+ IMON 11 26 ISEN2- 12 25 DAC PWM2 13 14 15 16 17 18 19 20 21 22 23 24 FN6696 Rev 3.00 Page 2 of 32 May 5, 2016 REF TM APA VR HOT COMP H CPURST N FB VR RDY VDIFF OVP RGND SS VSEN FS TCOMP EN VTT VCC EN PWR ISEN5+ ISEN6+ ISEN5- ISEN6- PWM5 PWM6