DATASHEET ISL68137 FN8757 Rev.1.00 Digital Dual Output, 7-Phase Configurable PWM Controller with Adaptive Voltage Jun 26, 2017 Scaling Bus (AVSBus) The ISL68137 is a digital dual output, flexible multiphase Features (X+Y 7) PWM controller with Adaptive Voltage Scaling Bus PMBus 1.3 and AVSBus compliant (AVSBus) interface. The ISL68137 can be configured to support any desired phase assignments up to a maximum of - Telemetry - V , V , I , power IN/OUT, temperature, IN OUT OUT seven phases across the two outputs (X+Y). For example, 6+1, and various fault status registers 5+2, 4+2, 3+3, 3+2, or even a single output as a 7+0 - Individual AVSBus interface enables high speed voltage configuration are supported. The flexible phase arrangement, changes combined with PMBus and AVSBus interfaces, allows the Advanced linear digital modulation scheme device to support any demanding power supply requirement. - Zero latency synthetic current control for excellent HF The ISL68137 with AVSBus complements PMBus by providing current balance a common interface that accelerates point-to-point communication between the controller and the load to - Dual-edge modulation for fastest transient response statically and dynamically control the processor voltage, thus Auto phase add/drop for excellent load vs efficiency profile delivering a balanced and power-efficient solution. AVSBus can be used exclusively after the device is configured using PMBus. Flexible phase configuration The ISL68137 uses Intersils proprietary linear synthetic digital - 7+0, 6+1, 5+2, 4+3 phase operation current modulation scheme to achieve the industrys best - Operation using less than seven phases between two combination of transient response and ease of tuning, while outputs is also supported addressing the challenges of modern multiphase designs. Diode braking for overshoot reduction Device configuration and telemetry monitoring is Differential remote voltage sensing supports 0.5% closed accomplished using Intersil s intuitive PowerNavigator GUI. loop system accuracy over load, line, and temperature The ISL68137 device supports on-chip nonvolatile memory to store various configuration settings that are user selectable Highly accurate current sensing for excellent load-line through pin-strap, giving system designers increased power regulation and accurate OCP density to configure and deploy multiple configurations. The - Supports ISL99227 60A smart power stages device supports an automatic phase add/drop feature to allow - Supports DCR sense with integrated temperature maximum efficiency across all load ranges. Thresholds for compensation automatic phase add/drop are user programmable using the powerful PowerNavigator GUI. Supports phase doubler (ISL6617A) for up to 14-phase operation The ISL68137 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 power-good and output overvoltage/undervoltage fault - Pulse-by-pulse phase current limiting thresholds and temperature monitoring, almost any need is - Total output current protection accommodated. - Output and input OV/UV With minimal external components, easy configuration, robust - Open voltage sense detect fault management, and highly accurate regulation capability, - Black box recording capability for faults implementing a high-performance multiphase regulator has Intuitive configuration using the PowerNavigator GUI never been easier. - NVM to store up to eight configurations Applications Pb-free (RoHS compliant) Networking equipment Related Literature Telecom and datacom equipment For a full list of related documents, visit our website Server and storage equipment - ISL68137 product page Point-of-load power supply (Memory, DSP, ASIC, FPGA) FN8757 Rev.1.00 Page 1 of 54 Jun 26, 2017ISL68137 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: 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 9 Absolute Maximum Ratings 10 Thermal Information 10 Recommended Operating Conditions . 10 Electrical Specifications 10 Typical Performance Curves . 12 Functional Description 13 Overview . 13 PWM Modulation Scheme 13 PMBus Address Selection . 13 Phase Configuration . 13 Automatic Phase Add and Drop . 13 Output Voltage Configuration 14 Switching Frequency . 14 Current Sensing . 14 Temperature Sensing 15 Temperature Compensation 16 Lossless Input Current and Power Sensing 16 Voltage Regulation 17 Current Feedback . 17 Power-On Reset (POR) . 17 Soft-Start Delay and Ramp Times 17 Stored Configuration Selection 17 Fault Monitoring and Protection 17 Power-Good Signals 18 Output Voltage Protection 18 Output Current Protection . 18 Smart Power Stage OC Fault Detect 20 Thermal Monitoring and Protection . 20 Layout and Design Considerations 21 PMBus Operation . 22 PMBus Protocol 23 PMBus Command Summary 24 PMBus Use Guidelines . 25 PMBus Data Formats 25 PMBus Command Detail . 26 OT FAULT LIMIT (4Fh) . 34 Adaptive Voltage Scaling (AVSBus) Functionality and Operation 49 AVSBus Master Send Subframe 49 AVSBus Slave Response Subframe . 49 . 50 AVSBus Command Detail . Revision History 53 About Intersil 53 Package Outline Drawing 54 FN8757 Rev.1.00 Page 2 of 54 Jun 26, 2017