DATASHEET ISL68134 FN8817 Rev.1.00 Digital Dual Output, 4-Phase Configurable, PWM Controller with Adaptive Voltage Jun 19, 2017 Scaling Bus The ISL68134 is a digital dual output, flexible multiphase Features (X+Y 4) PWM controller with Adaptive Voltage Scaling (AVSBus) PMBus 1.3 and AVSBus compliant interface. Either output can be configured to support any desired phase assignments up to a maximum of four phases across the - Telemetry - V , V , I , power IN/OUT, temperature, IN OUT OUT two outputs (X+Y). For example, 3+1, 2+2, 2+1, or even a single and various fault status registers output operation as a 4+0 configuration are supported. The - Individual AVSBus interface enables high speed voltage flexible phase arrangement, combined with PMBus and AVSBus changes interfaces, allows the device to support any demanding power Advanced linear digital modulation scheme supply requirement. The ISL68134 with AVSBus complements - Zero latency synthetic current control for excellent HF PMBus by providing a common interface that accelerates current balance point-to-point communication between the controller and the load to statically and dynamically control processor voltage, thus - Dual edge modulation for fastest transient response delivering a balanced and power efficient solution. AVSBus can be Auto phase add/drop for excellent load vs efficiency profile used exclusively after the device is configured using PMBus. The Flexible phase configuration ISL68134 uses Intersils proprietary linear synthetic digital - 4+0, 3+1, 2+2 phase operation current modulation scheme to achieve the industrys best combination of transient response and ease of tuning while - Operation using less than four phases between two addressing the challenges of modern multiphase designs. outputs is also supported Device configuration and telemetry monitoring is accomplished Diode braking for overshoot reduction using Intersil s intuitive PowerNavigator GUI. The ISL68134 Differential remote voltage sensing supports 0.5% closed device supports on-chip nonvolatile memory to store various loop system accuracy over load, line, and temperature configuration settings that are user selectable through pin-strap, Highly accurate current sensing for excellent load line giving system designers increased power density to configure and regulation and accurate OCP deploy multiple configurations. The device supports an automatic - Supports ISL99227 60A smart power stage phase add/drop feature to allow maximum efficiency across all load ranges. Thresholds for automatic phase add/drop are user - Supports DCR sense with integrated temperature programmable using the powerful PowerNavigator GUI. compensation The ISL68134 supports a comprehensive fault management Comprehensive fault management enables high reliability system to enable the design of highly reliable systems. From a systems multitiered overcurrent protection scheme, to the configurable - Pulse-by-pulse phase current limiting power-good and output overvoltage/undervoltage fault - Total output current protection thresholds and temperature monitoring, almost any need is - Output and input OV/UV accommodated. - Open voltage sense detect With minimal external components, easy configuration, robust - Black box recording capability for faults fault management, and highly accurate regulation capability, implementing a high performance multiphase regulator has Intuitive configuration using PowerNavigator GUI never been easier. - NVM to store up to eight configurations Pb-free (RoHS compliant) Applications Networking equipment Related Literature Telecom/datacom equipment For a full list of related documents, visit our website Server/storage equipment - ISL68134 product page Point-of-load power supply (Memory, DSP, ASIC, FPGA) FN8817 Rev.1.00 Page 1 of 50 Jun 19, 2017ISL68134 Table of Contents Ordering Information 3 Pin Configuration 3 Functional Pin Descriptions . 4 Driver, DrMOS and Smart Power Stage Recommendation . 5 Internal Block Diagram . 5 Typical Application: 2+2 Configuration with ISL99227 SPS 6 Typical Application: 3+1 Configuration with ISL99227 SPS 7 Typical Application: 2+2 Configuration with DCR Sensing . 8 Absolute Maximum Ratings . 9 Thermal Information . 9 Recommended Operating Conditions 9 Electrical Specifications . 9 Typical Performance Curves . 11 Functional Description 11 Overview . 11 PWM Modulation Scheme 11 PMBus Address Selection . 12 Phase Configuration . 12 Automatic Phase Add and Drop . 12 Output Voltage Configuration 12 Switching Frequency . 13 Current Sensing . 13 Temperature Sensing 14 Temperature Compensation 14 Lossless Input Current and Power Sensing 15 Voltage Regulation 15 Current Feedback . 15 Power-On Reset (POR) . 15 Soft-Start Delay and Ramp Times 15 Stored Configuration Selection 16 Fault Monitoring and Protection 16 Power-Good Signals 16 Output Voltage Protection 16 Output Current Protection . 16 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 Adaptive Voltage Scaling (AVSBus) Functionality and Operation 46 AVSBus Master Send Subframe 46 AVSBus Slave Response Subframe . 46 AVSBus Command Detail 46 Revision History 49 About Intersil 49 Package Outline Drawing 50 FN8817 Rev.1.00 Page 2 of 50 Jun 19, 2017