DATASHEET ISL68147 FN8880 Rev.2.00 Digital Dual Output, 7-Phase Configurable, PWM Controller with PMBus for Jul 14, 2017 Cavium The ISL68147 is a digital dual output, flexible multiphase Features (X+Y 7) PWM controller developed to support the latest Advanced linear digital modulation scheme Cavium CN99xx server class processors. The ISL68147 supports the PMbus1.3 specification and meets the latest Intel - Zero latency synthetic current control for excellent HF server-class transient performance specifications. Either current balance output can be configured to support any desired phase - Dual-edge modulation for fastest transient response assignments up to a maximum of seven phases across the two Auto phase add/drop for excellent load vs efficiency profile outputs (X+Y). For example, 6+1, 5+2, 4+2, 3+3, 3+2, or even a single output operation as a 7+0 configuration. With full PMBus 1.3 support digital control, this new generation of controllers ushers in - Telemetry - V , V , I , power IN/OUT, temperature, IN OUT OUT design flexibility by supporting any microprocessor, FPGA, or and various fault status registers Digital ASIC rail requirements that includes adjustable load - Up to 2MHz bus interface setting. The ISL68147 uses the Intersil proprietary linear synthetic digital current modulation scheme to achieve the Flexible phase configuration industrys best combination of transient response and ease of - 7+0, 6+1, 5+2, 4+3 phase operation tuning while addressing the challenges of modern multiphase - Operation using fewer than seven phases between two designs. outputs is also supported Device configuration and telemetry monitoring is Diode braking for overshoot reduction accomplished using the Intersil PowerNavigator GUI. The Differential remote voltage sensing supports 0.5% closed ISL68147 device supports on-chip, nonvolatile memory to loop system accuracy over load, line, and temperature store various configuration settings that are user-selectable through pin strap, giving system designers increased power Highly accurate current sensing for excellent load line density to configure and deploy multiple configurations. The regulation and accurate OCP device supports an automatic phase add/drop feature to allow - Supports the ISL99227 60A smart power stages maximum efficiency across all load ranges. Thresholds for - Supports DCR sense with integrated temperature automatic phase add/drop are user-programmable using compensation PowerNavigator. Supports Phase Doubler (ISL6617A) for up to 14-phase The ISL68147 supports a comprehensive fault management operation system to enable the design of highly reliable systems. From a Comprehensive fault management enables high reliability multitiered overcurrent protection scheme to the configurable systems power-good and output overvoltage/undervoltage fault thresholds and temperature monitoring, almost any need is - Pulse-by-pulse phase current limiting accommodated. - Total output current protection - Output and input OV/UV With minimal external components, easy configuration, robust fault management, and highly accurate regulation capability, - Open voltage sense detect implementing a high-performance, multiphase regulator has - Black box recording capability for faults never been easier. Intuitive configuration using PowerNavigator - NVM to store up to 8 configurations Applications Networking equipment Pb-free (RoHS compliant) Telecom/datacom equipment Related Literature Server/storage equipment For a full list of related documents, visit our website Point-of-load power supply (Memory, DSP, ASIC, FPGA) - ISL68147 product page FN8880 Rev.2.00 Page 1 of 47 Jul 14, 2017ISL68147 Table of Contents Ordering Information 3 Pin Configuration 3 Functional Pin Descriptions . 4 Driver, DrMOS, and Smart Power Stage Recommendation . 4 Internal Block Diagram . 5 Typical Application: 6+1 Configuration with ISL99227 SPS 6 Typical Application: 4+3 Configuration with ISL99227 SPS 7 Typical Application: 5+2 Configuration with DCR Sensing . 8 Typical Application: Phase Doubler 14-Phase VR with ISL6617A+SPS . 9 Absolute Maximum Ratings 10 Thermal Information 10 Recommended Operating Conditions . 10 Electrical Specifications 10 Typical Performance Curves . 12 Functional Description 12 Overview . 12 PWM Modulation Scheme 12 PMBus Address Selection . 12 Phase Configuration . 12 Automatic Phase Add and Drop . 13 Output Voltage Configuration 13 Switching Frequency . 13 Current Sensing . 13 Temperature Sensing 14 Temperature Compensation 15 Lossless Input Current and Power Sensing 15 Voltage Regulation 16 Current Feedback . 16 Power-On Reset (POR) . 16 Soft-Start Delay and Ramp Times 16 Stored Configuration Selection 16 Fault Monitoring and Protection 16 Power-Good Signals 17 Output Voltage Protection 17 Output Current Protection . 17 Smart Power Stage OC Fault Detect 18 Thermal Monitoring and Protection . 18 Layout and Design Considerations 19 PMBus Operation . 20 PMBus Protocol 21 PMBus Command Summary 22 PMBus Use Guidelines . 23 PMBus Data Formats 23 PMBus Command Detail . 24 Revision History 46 About Intersil 46 Package Outline Drawing 47 FN8880 Rev.2.00 Page 2 of 47 Jul 14, 2017