DATASHEET ISL28023 FN8389 Rev 5.00 Precision Digital Power Monitor with Margining March 18, 2016 The ISL28023 is a bidirectional high-side and low-side digital Features current sense and voltage monitor with a serial interface. The Bus voltage sense range 0V to 60V device monitors power supply current, voltage and provides the digital results along with calculated power. The ISL28023 Voltage gain error . 0.05% provides tight accuracy of 0.05% for both voltage and current Current gain error . 0.05% monitoring. The auxiliary input provides an additional power Internal temperature sensor accuracy +1.0C monitor function. High or low (RTN) side sensing The V power can either be externally supplied or internally CC Bidirectional current sensing regulated, which allows the ISL28023 to handle a Auxiliary low voltage channel common-mode input voltage range from 0V to 60V. The wide ADC, 16-bit native resolution range permits the device to handle telecom, automotive and Programmable averaging modes industrial applications with minimal external circuitry. Internal 3.3V regulator An 8-bit voltage DAC enables a DC/DC converter output voltage Internal temperature sense margining. Fault indication includes a Bus Voltage window and Overvoltage/undervoltage and current fault monitoring with overcurrent fast fault logic indication. 500ns detection delay The ISL28023 serial interface is PMBus compatible and 8-bit voltage output DAC operates down to 1.2V voltage. It draws an average current of 2 I C/SMBus/PMBus interface that handles 1.2V supply just 800A and is available in the space saving 24 Ld QFN 4mmx4mm package. The part operates across the full Applications industrial temperature range from -40C to +125C. Data processing servers Related Literature DC power distribution Telecom equipment AN1955, Design Ideas for Intersil Digital Power Monitors Portable communication equipment AN1932, ISL28023 Precision Digital Power Monitor DC/DC, AC/DC converters Evaluation Kit 2 Many I C DAC and ADC with alert applications 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 8-Bit FB PG En Sense DAC R 1 R 3 To SMBAlert1 GPIO/Int V IN VOUT = 0.6 + SCL (0.6 DAC OUT) MCU * R2/R1 SDA GPIO FIGURE 1. APPLICATION DIAGRAM FN8389 Rev 5.00 Page 1 of 55 March 18, 2016 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 FN8389 Rev 5.00 Page 2 of 55 March 18, 2016