DATASHEET ISL68124 FN8796 Rev.2.00 Digital Dual Output, 4-Phase Configurable, PWM Controller with PMBus June 16, 2017 The ISL68124 is a digital dual output, flexible multiphase Features (X+Y 4) PWM controller supporting the latest PMBus 1.3 Advanced linear digital modulation scheme specifications. Either output can be configured to support any desired phase assignments up to a maximum of four phases - Zero latency synthetic current control for excellent HF across the two outputs (X+Y). For example, 3+1, 2+2, 2+1, or current balance even a single output operation as a 4+0 configuration are - Dual edge modulation for fastest transient response supported. The ISL68124 uses Intersils proprietary linear Auto phase add/drop for excellent load vs efficiency profile synthetic digital current modulation scheme to achieve the industrys best combination of transient response and ease PMBus 1.3 support of tuning while addressing the challenges of modern - Telemetry - V , V , I , power IN/OUT, temperature, IN OUT OUT multiphase designs. and various fault status registers - Up to 2MHz bus interface Device configuration and telemetry monitoring is accomplished using Intersil s intuitive PowerNavigator GUI. Flexible phase configuration The ISL68124 device supports on-chip nonvolatile memory to - 4+0, 3+1, 2+2 phase operation store various configuration settings that are user selectable - Operation using less than four phases between two through pin-strap, giving system designers increased power outputs is also supported density to configure and deploy multiple configurations. The device supports an automatic phase add/drop feature to allow Diode braking for overshoot reduction maximum efficiency across all load ranges. Thresholds for Differential remote voltage sensing supports 0.5% closed automatic phase add/drop are user programmable using the loop system accuracy over load, line, and temperature powerful PowerNavigator GUI. Highly accurate current sensing for excellent load line The ISL68124 supports a comprehensive fault management regulation and accurate OCP system to enable the design of highly reliable systems. From a - Supports ISL99227 60A smart power stage multitiered overcurrent protection scheme, to the configurable - Supports DCR sense with integrated temperature power-good and output overvoltage/undervoltage fault compensation thresholds and temperature monitoring, almost any need is accommodated. Comprehensive fault management enables high reliability systems With minimal external components, easy configuration, robust fault management, and highly accurate regulation capability, - Pulse-by-pulse phase current limiting implementing a high-performance, multiphase regulator has - Total output current protection never been easier. - Output and input OV/UV - Open voltage sense detect Applications - Black box recording capability for faults Networking equipment Intuitive configuration using PowerNavigator GUI Telecom/datacom equipment - NVM to store up to 8 configurations Server/storage equipment Pb-free (RoHS compliant) Point-of-load power supply (Memory, DSP, ASIC, FPGA) Related Literature For a full list of related documents, visit our website - ISL68124 product page FN8796 Rev.2.00 Page 1 of 46 June 16, 2017ISL68124 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: 3+1 Configuration with ISL99227 SPS 6 Typical Application: 2+2 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 . 11 Phase Configuration . 11 Automatic Phase Add and Drop . 12 Output Voltage Configuration 12 Switching Frequency . 12 Current Sensing . 12 Temperature Sensing 13 Temperature Compensation 14 Lossless Input Current and Power Sensing 14 Voltage Regulation 15 Current Feedback . 15 Power-On Reset (POR) . 15 Soft-Start Delay and Ramp Times 15 Stored Configuration Selection 15 Fault Monitoring and Protection 16 Power-Good Signals 16 Output Voltage Protection 16 Output Current Protection . 16 Smart Power Stage OC Fault Detect 17 Thermal Monitoring (TWARN) and Protection 17 Layout and Design Considerations 18 PMBus Operation . 19 PMBus Protocol 20 PMBus Command Summary 21 PMBus Use Guidelines . 22 PMBus Data Formats 22 PMBus Command Detail . 23 Revision History 45 About Intersil 45 Package Outline Drawing 46 FN8796 Rev.2.00 Page 2 of 46 June 16, 2017