18mm DATASHEET ISL8273M FN8704 Rev.4.00 80A Single Channel Digital PMBus Step-Down Power Module Nov 9, 2017 The ISL8273M is a complete PMBus enabled DC/DC single Features channel step-down advance power supply capable of delivering Complete digital power supply up to 80A of current and optimized for high power density applications. For higher output current, up to four ISL8273Ms 80A single channel output current can be paralleled to supply up to 320A in a multiphase current - 4.5V to 14V single rail input voltage sharing configuration. -Up to 93% efficiency Operating over an input voltage range of 4.5V to 14V, the - Up to 320A/4 parallel modules capable solution ISL8273M offers adjustable output voltages down to 0.6V and - Multiphase and current sharing operations achieves up to 93% conversion efficiencies. A unique (180/22.5 steps) ChargeMode control architecture provides a single clock cycle Programmable output voltage response to an output load step and can support switching frequencies up to 1MHz. The power module integrates all power - 0.6V to 2.5V output voltage settings and most passive components and requires only a few external - 1% accuracy over line, load, and temperature components to operate. A set of optional external resistors allows ChargeMode control loop architecture the user to easily configure the device for standard operation. For advanced configurations, a standard PMBus interface addresses - 296kHz to 1.06MHz fixed switching frequency operations sequencing and fault management, as well as real-time full - No compensation required telemetry and point-of-load monitoring. Additionally, on-board - Fast single clock cycle transient response nonvolatile memory can store the desired custom configuration PMBus interface and/or pin-strap mode and settings. - Fully programmable through PMBus A fully customizable voltage, current, and temperature - Pin-strap mode for standard settings protection scheme ensures safe operation for the ISL8273M - Real-time telemetry for V , V , I , temperature, duty under abnormal operating conditions. The device is also IN OUT OUT cycle, and f supported by the PowerNavigator software, a full digital SW power train development environment. Advanced soft-start/stop, sequencing, and margining The ISL8273M is available in a low profile compact On-board nonvolatile memory 18mmx23mmx7.5mm fully encapsulated thermally enhanced Complete over/undervoltage, current, and temperature HDA package. protections with fault logging Applications PowerNavigator supported Server, telecommunications, storage, and data Thermally enhanced 18mmx23mmx7.5mm HDA package communications Related Literature Industrial/ATE and networking equipment For a full list of related documents, visit our website General purpose power for ASIC, FPGA, DSP, and memory - ISL8273M product page VIN VIN VOUT CIN VOUT VDD VSENP ENABLE COUT EN VSENN PG VR5 VR 10F 10F VR6 VR55 ISL8273M VDRV VCC SCL 7.5mm VDRV1 PMBUS 100k SDA 2x10F INTERFACE SALRT VMON SGND PGND 6.65k NOTE: Figure 1 represents a typical implementation of the ISL8273M. For PMBus operation, it is recommended to tie the enable pin (EN) to SGND. FIGURE 1. 80A APPLICATION CIRCUIT FIGURE 2. A SMALL PACKAGE FOR HIGH POWER DENSITY FN8704 Rev.4.00 Page 1 of 59 Oct 13, 2017 23mmISL8273M Table of Contents Ordering Information 3 Pin Configuration 3 Pin Descriptions . 4 ISL8273M Internal Block Diagram . 6 Typical Application Circuit - Single Module 7 Typical Application Circuit - Three Module Current Sharing 8 Absolute Maximum Ratings 10 Thermal Information 10 Recommended Operating Conditions . 10 Electrical Specifications 10 Typical Performance Curves . 13 Efficiency Performance . 13 Transient Response Performance 14 Derating Curves 15 Functional Description 16 SMBus Communications 16 Output Voltage Selection . 16 Soft-Start, Stop Delay, and Ramp Times 16 Power-Good 17 Switching Frequency and PLL . 17 Loop Compensation . 18 Input Undervoltage Lockout (UVLO) . 18 SMBus Module Address Selection 18 Output Overvoltage Protection . 19 Output Prebias Protection 19 Output Overcurrent Protection . 19 Thermal Overload Protection 20 Digital-DC Bus 20 Active Current Sharing . 20 Phase Spreading 21 Fault Spreading . 21 Output Sequencing 21 Monitoring with SMBus . 22 Snapshot Parameter Capture . 22 Nonvolatile Memory . 22 Layout Guide . 22 Thermal Considerations . 23 Package Description . 23 PCB Layout Pattern Design . 23 Thermal Vias 23 Stencil Pattern Design . 23 Reflow Parameters 23 PMBus Command Summary 24 PMBus Data Formats 27 PMBus Use Guidelines 28 Summary 28 PMBus Commands Description . 28 Datasheet Revision History 51 Firmware Revision History . 52 About Intersil 52 Package Outline Drawing 53 FN8704 Rev.4.00 Page 2 of 59 Oct 13, 2017