DATASHEET ISL6336D FN8320 Rev 0.00 VR11.1, 6-Phase PWM Controller with Phase Dropping, Droop Disabled and Load Oct 6, 2014 Current Monitoring Features The ISL6336D controls voltage regulators by driving up to 6 Features interleaved synchronous-rectified buck channels in parallel. Intel VR11.1 compliant with droop disabled This multiphase architecture results in multiplying channel ripple frequency and reducing input and output ripple currents. Proprietary active pulse positioning (APP) and adaptive Lower ripple results in fewer components, lower cost, reduced phase alignment (APA) modulation scheme power dissipation, and smaller implementation area. Proprietary active phase adding and dropping for high light The ISL6336D utilizes Intersils proprietary Active Pulse load efficiency Positioning (APP), Adaptive Phase Alignment (APA) Precision multiphase core voltage regulation modulation scheme, active phase adding and dropping to - Differential remote voltage sensing achieve and maintain the extremely fast transient response - 0.5% closed-loop system accuracy over load, line and with fewer output capacitors and high efficiency from light to temperature full load. - Bidirectional, adjustable reference-voltage offset The ISL6336D is designed to be completely compliant with Precision resistor or DCR differential current sensing Intel VR11.1 specifications with exception of droop disabled. It accurately reports the load current via the IMON pin to the - Accurate channel-current balancing microprocessor, which sends an active low PSI signal to the - Accurate load current monitoring via IMON pin controller at low power mode. The controller then enters 1- or Microprocessor voltage identification input 2-phase operation option to reduce magnetic core and switching losses, yielding high efficiency at light load. After the - Dynamic VID technology for VR11.1 requirement PSI signal is deasserted, the dropped phase(s) are added - 8-bit VID, VR11 compatible back to sustain heavy load transient response and efficiency. Average overcurrent protection and channel current limit The ISL6336D senses the output current continuously by Precision overcurrent protection on IMON pin utilizing patented techniques to measure the voltage across Thermal monitoring and overvoltage protection the dedicated current sense resistor or the DCR of the output inductor. Current sensing circuits also provide the needed Integrated programmable temperature compensation signals for channel-current balancing, average overcurrent Integrated open sense line protection protection and individual phase current limiting. An NTC thermistors temperature is sensed via the TM pin and 1- to 6-phase operation, coupled inductor compatibility internally digitized for thermal monitoring and for integrated Adjustable switching frequency up to 1MHz per phase thermal compensation of the current sense elements. Package option A unity gain, differential amplifier is provided for remote - QFN compliant to JEDEC PUB95 MO-220 QFN - quad flat voltage sensing and completely eliminates any potential no leads - product outline difference between remote and local grounds. This improves Pb-free (RoHS compliant) regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6336D 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. FN8320 Rev 0.00 Page 1 of 30 Oct 6, 2014ISL6336D Table of Contents Ordering Information 3 Pin Configuration 4 Pin Descriptions . 4 Absolute Maximum Ratings 10 Thermal Information 10 Operating Conditions . 10 Electrical Specifications 10 Multiphase Power Conversion . 13 Interleaving . 13 PWM Modulation Scheme 14 PWM and PSI Operation . 14 Switching Frequency . 14 Current Sensing . 14 Channel-Current Balance . 16 Voltage Regulation 16 Output-Voltage Offset Programming 19 Dynamic VID 20 Operation Initialization 20 Enable and Disable 20 Soft-Start . 20 Current Sense Output . 21 Fault Monitoring and Protection 21 VR RDY Signal 21 Undervoltage Detection 21 Overvoltage Protection . 21 Overcurrent Protection . 22 Thermal Monitoring (VR HOT/VR FAN) 22 Temperature Compensation 23 Integrated Temperature Compensation . 23 Design Procedure . 24 External Temperature Compensation . 24 Power Stages . 25 Current Sensing Resistor . 25 Compensation 26 Switching Frequency Selection 27 Input Capacitor Selection . 27 Layout Considerations 28 Component Placement . 28 Voltage-Regulator (VR) Design Materials 29 Revision History 29 About Intersil 29 Package Outline Drawing 30 FN8320 Rev 0.00 Page 2 of 30 Oct 6, 2014