DATASHEET Precision Digital Power Monitor with Margining ISL28023 Features The ISL28023 is a bidirectional high-side and low-side digital Bus voltage sense range 0V to 60V current sense and voltage monitor with a serial interface. The Voltage gain error . 0.05% device monitors power supply current, voltage and provides Current gain error . 0.05% the digital results along with calculated power. The ISL28023 Internal temperature sensor accuracy +1.0C provides tight accuracy of 0.05% for both voltage and current High or low (RTN) side sensing monitoring. The auxiliary input provides an additional power Bidirectional current sensing monitor function. Auxiliary low voltage channel The V power can either be externally supplied or internally CC ADC, 16-bit native resolution regulated, which allows the ISL28023 to handle a Programmable averaging modes common-mode input voltage range from 0V to 60V. The wide range permits the device to handle telecom, automotive and Internal 3.3V regulator industrial applications with minimal external circuitry. Internal temperature sense Overvoltage/undervoltage and current fault monitoring with An 8-bit voltage DAC enables a DC/DC converter output voltage 500ns detection delay margining. Fault indication includes a Bus Voltage window and overcurrent fast fault logic indication. 8-bit voltage output DAC 2 I C/SMBus/PMBus interface that handles 1.2V supply The ISL28023 serial interface is PMBus compatible and operates down to 1.2V voltage. It draws an average current of Applications just 800A and is available in the space saving 24 Ld QFN 4mmx4mm package. The part operates across the full Data processing servers industrial temperature range from -40C to +125C. DC power distribution Telecom equipment Related Literature Portable communication equipment AN1955, Design Ideas for Intersil Digital Power Monitors DC/DC, AC/DC converters 2 AN1932, ISL28023 Precision Digital Power Monitor Many I C DAC and ADC with alert applications Evaluation Kit V = 4.5V 36V IN V IN RSH VCC SMBALERT1 ISL28023 VINP GND 3.3V Vreg A0 A1 Ext Temp VINM Place Diode A2 ADC Near RSH 16-Bit Phase VBUS VIN SCL AUXP Lo SDA ISL85415 mp 0.1F AUXM PMBus BOOT REG SMBALERT2 AUXV MAP R 2 I2CVCC DAC OUT Temp FB 8-Bit En PG Sense DAC R 1 R 3 To SMBAlert1 GPIO/Int VIN VOUT = 0.6 + SCL (0.6 DAC OUT) MCU * R2/R1 SDA GPIO FIGURE 1. APPLICATION DIAGRAM March 18, 2016 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas LLC 2014-2016. All Rights Reserved FN8389.5 Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Sync,Comp VCC,FS,SS 1F GND LOAD Vmcu SW MUX GND Vreg in 2 Vreg Out I C SMBUS R pullUp R pullUpISL28023 Table of Contents Block Diagram 3 Ordering Information 3 Pin Configuration 4 Pin Descriptions . 4 Absolute Maximum Ratings . 6 Thermal Information . 6 Recommended Operating Conditions 6 Electrical Specifications . 6 Typical Performance Curves . 12 Overview 27 Pin Descriptions 27 Communication Protocol 30 Packet Error Correction (PEC) . 30 IC Device Details 31 Global IC Controls . 32 Primary and Auxiliary Channel Controls . 32 Measurement Registers 35 Threshold Detectors . 36 SMB Alert 38 External Clock Control 42 Voltage Margin 42 2 SMBus/I C Serial Interface 43 Protocol Conventions 44 SMBus, PMBus Support 44 Device Addressing 45 Write Operation . 46 Read Operation . 46 Group Command 46 Clock Speed 47 Signal Integrity . 47 Fast Transients 47 External Clock . 48 Overranging 49 Shunt Resistor Selection 49 Lossless Current Sensing (DCR) 50 Layout . 51 A Trace as a Sense Resistor . 53 Revision History 54 About Intersil 54 Package Outline Drawing 55 Submit Document Feedback FN8389.5 2 March 18, 2016