17mm DATASHEET ISL8271M FN8636 Rev.4.00 Digital DC/DC PMBus 33A Module Aug 17, 2017 The ISL8271M is a 33A step-down DC/DC power supply module Features with an integrated digital PWM controller, synchronous power Complete digital switch mode power supply switches, an inductor, and passives. Only bulk input and output capacitors are needed to finish the design. The 33A of -Wide V range: 4.5V to 14V IN continuous output current can be delivered without the need -Programmable V range: 0.6V to 5V OUT for airflow or a heatsink. The thermally enhanced HDA module 2 PMBus compliant I C communication interface is capable of dissipating heat directly into the PCB. -Programmable V , margining, UV/OV, I limit, OUT OUT The ISL8271M uses ChargeMode control architecture, which soft-start/stop, sequencing, and external synchronization responds to a transient load within a single switching cycle. - Monitor: V , V , I , temperature, duty cycle, IN OUT OUT The ISL8271M comes with a preprogrammed configuration for switching frequency, and faults operating in a pin-strap mode: the output voltage, switching frequency, and the device SMBus address can be programmed ChargeMode control architecture with external resistors. Other configuration options, such as 1.0% V accuracy over line, load, and temperature OUT soft-start and fault limits can be programmed or changed Power-good indicator using the PMBus compliant serial bus interface. PMBus can be used to monitor voltages, current, temperatures, and fault Over-temperature protection status. The ISL8271M is supported by PowerNavigator Internal nonvolatile memory and fault logging software, a Graphical User Interface (GUI) that can be used to Patented thermally enhanced HDA package configure modules to a desired solution. Intuitive configuration using PowerNavigator The ISL8271M is available in a 40 Ld compact 17mmx19mm HDA module with very low profile height of 3.55mm, suitable Applications for automated assembly by standard surface mount equipment. The ISL8271M is RoHS compliant by exemption. Server, telecom, storage, and datacom Industrial/ATE and networking equipment Related Literature General purpose power for ASIC, FPGA, DSP, and memory For a full list of related documents, visit our website - ISL8271M product page V IN V V V OUT IN OUT C V IN SEN+ V DD C OUT V SEN- 2.2 ISL8271M V DRVIN SCL V 3.55mm DRVOUT SDA 1 10 SALRT SGND PGND NOTE: 1. Only bulk input and output capacitors are required to finish the design. FIGURE 1. A COMPLETE DIGITAL SWITCH MODE POWER SUPPLY FIGURE 2. A SMALL PACKAGE FOR HIGH POWER DENSITY FN8636 Rev.4.00 Page 1 of 57 Aug 17, 2017 19mm PMBUS INTERFACEISL8271M Table of Contents Ordering Information 3 Pin Configuration 4 Pin Descriptions . 4 ISL8271M Internal Block Diagram 6 Absolute Maximum Ratings . 7 Thermal Information . 7 Recommended Operating Conditions 7 Electrical Specifications . 7 Typical Performance Curves . 10 Efficiency Performance . 10 Transient Response Performance 11 Derating Curves . 12 Derating Curves . 13 Typical Application Circuit . 14 Functional Description 16 SMBus Communications 16 Output Voltage Selection . 16 Soft-start Delay and Ramp Times 16 Power-Good 16 Switching Frequency and PLL . 17 Loop Compensation . 17 Input Undervoltage Lockout (UVLO) . 17 SMBus Module Address Selection 17 Output Overvoltage Protection . 18 Output Prebias Protection 18 Output Overcurrent Protection . 18 Thermal Overload Protection 18 Digital-DC Bus 19 Phase Spreading 19 Output Sequencing 19 Fault Spreading . 19 Temperature Monitoring Using XTEMP Pin . 19 Monitoring Using SMBus 20 Snapshot Parameter Capture . 20 Nonvolatile Memory . 20 PCB Layout Guidelines 21 Thermal Considerations . 22 Package Description . 22 PCB Layout Pattern Design . 22 Thermal Vias 22 Stencil Pattern Design . 22 Reflow Parameters 22 PMBus Command Summary 23 PMBus Data Formats 26 PMBus Use Guidelines 27 Summary 27 PMBus Command Description 27 Revision History 49 Firmware Revision History . 50 About Intersil 50 Package Outline Drawing 51 FN8636 Rev.4.00 Page 2 of 57 Aug 17, 2017