17mm DATASHEET ISL8277M FFNN89289233 ReRevv..1.1.0000 Digital DC/DC PMBus 25A Module Aug 17, 201Aug 17, 20177 The ISL8277M is a 25A 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 25A of -Wide V range: 4.5V to 14V IN continuous output current can be delivered without a need of -Programmable V range: 0.6V to 5V OUT airflow or a heatsink. The thermally enhanced HDA module is 2 PMBus compliant I C communication interface capable of dissipating heat directly into the PCB. -Programmable V , margining, UV/OV, I limit, OUT OUT The ISL8277M 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 ISL8277M comes with a preprogrammed configuration for switching frequency, and faults operating in a pin-strap mode. Output voltage, switching frequency, and device SMBus address can be programmed ChargeMode control architecture with external resistors. More configuration such as soft-start 1.0% V accuracy over line, load, and temperature OUT and fault limits can be easily programmed or changed using Power-good indicator the PMBus compliant serial bus interface. PMBus can be used to monitor voltages, current, temperatures, and fault status. Over-temperature protection The ISL8277M is supported by PowerNavigator software, a Internal nonvolatile memory and fault logging graphical user interface (GUI) that can be used to configure Patented thermally enhanced HDA package modules to a desired solution. Intuitive configuration via PowerNavigator The ISL8277M is available in a 41-pin compact 17mmx19mm HDA module with very low profile height of 3.6mm, suitable for Applications automated assembly by standard surface mount equipment. The ISL8277M is RoHS compliant by exemption. Server, telecom, storage, and datacom Industrial/ATE and networking equipment General purpose power for ASIC, FPGA, DSP, and memory Related Literature For a full list of related documents, visit our website - ISL87277M product page - V VIN VOUT IN V OUT VSEN+ C IN VDD C VSEN- OUT VDRVIN VDRVOUT VR55 ISL8277M 10F 10F 10F VCC SCL 3.6mm SDA ENABLE EN SALRT SGND PGND NOTE: 1. Only bulk input and output capacitors are required to finish the design. FIGURE 1. COMPLETE DIGITAL SWITCH-MODE POWER SUPPLY FIGURE 2. SMALL PACKAGE FOR HIGH POWER DENSITY FN8923 Rev.1.00 Page 1 of 57 Aug 17, 2017 19mm PMBUS INTERFACEISL8277M Table of Contents Ordering Information 3 Pin Configuration 4 Pin Descriptions . 4 ISL8277M 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 Typical Application Circuit . 14 Functional Description 17 SMBus Communications 17 Output Voltage Selection . 17 Soft-Start Delay and Ramp Times 17 Power-Good 18 Switching Frequency and PLL . 18 Loop Compensation . 18 Input Undervoltage Lockout (UVLO) . 19 SMBus Module Address Selection 19 Output Overvoltage Protection . 20 Output Prebias Protection 20 Output Overcurrent Protection . 20 Thermal Overload Protection 20 Digital-DC Bus 21 Phase Spreading 21 Output Sequencing 21 Fault Spreading . 21 Monitoring Via SMBus 21 Snapshot Parameter Capture . 21 Nonvolatile Memory . 21 PCB Layout Guidelines 21 Thermal Considerations . 22 Package Description . 22 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 Command Descriptions . 28 Revision History 50 Firmware Revision History . 50 About Intersil 50 Package Outline Drawing 51 FN8923 Rev.1.00 Page 2 of 57 Aug 17, 2017