SW MUX LOAD DATASHEET ISL28025 FN8388 Rev.6.01 Precision Digital Power Monitor with Real Time Alerts Feb 22, 2022 The ISL28025 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 and voltage, which provides the digital results along with calculated power. The Voltage gain error . 0.05% ISL28025 provides tight accuracy of less than 0.1% for both Current gain error . 0.05% voltage and current monitoring. High or low (RTN) side sensing The V power can either be externally supplied or internally CC Bidirectional current sensing regulated, which allows the ISL28025 to handle a Auxiliary low voltage input 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 industrial applications with minimal external circuitry. Programmable averaging modes Internal 3.3V regulator An 8-bit voltage DAC enable DC/DC converter output voltage margining (20 Pin QFN) Fault indication includes Bus Voltage Internal temperature sense window and over-current fast fault logic indication. The Over-voltage/undervoltage and current fault monitoring with ISL28025 includes an integrated temperature sensor for 500ns detection delay monitoring. 8-bit voltage output DAC (20 Pin QFN) The ISL28025 serial interface is PMBus compatible and 2 I C/SMBus/PMBus interface that handles 1.2V supply operates down to 1.2V. It draws an average current of just 2 55 I C slave addresses 1.3mA and is available in the space saving 16 ball WLCSP package. It is also available in a 20 lead QFN 4x4 (1.85SQmm Applications EPAD) The parts operate across the full industrial temperature range from -40C to +125C. Data processing servers DC power distribution Telecom equipment Portable communication equipment DC/DC and AC/DC converters Automotive power 2 Many I C ADC with alert applications FROM 1.8V TO 5.5V GND, PGND DAC OUT 3.3V (QFN) PVIN LX1 Vreg VCC ISL9110 10F Lo 3.3V BUCK/ VBUS ISL28025 GND BOOST LX2 VINP SCL VOUT ADC 16-Bit PG FB VINM En SDA AuxV PMBus REG MAP SMBALERT2 (ECLK WLCSP) TEMP SENSE I2CVCC SMBALERT1 A0 A1 A2 GPIO/Int SCL MCU SDA FIGURE 1. TYPICAL APPLICATION CIRCUIT FN8388 Rev.6.01 Page 1 of 51 Feb 22, 2022 2014 Renesas Electronics VIN MODE 1F R SH Vmcu GND DAC(8BIT) 2 Vreg in I C SMBUS R pullUp Vreg Out R pullUpISL28025 Table of Contents Block Diagram 3 Ordering Information 3 Pin Configurations 4 Pin Descriptions . 4 16 Ball WLCSP 4 20 Lead QFN 4x4 (1.85SQmm EPAD) .5 Absolute Maximum Ratings . 7 Thermal Information . 7 Recommended Operating Conditions 7 Electrical Specifications . 7 Typical Performance Curves . 12 Functional Description 22 Overview . 22 Functional Pin Descriptions . 22 Communication Protocol 25 Packet Error Correction (PEC) . 25 IC Device Details 26 Global IC Controls . 27 Primary and Auxiliary Channel Controls . 27 Measurement Registers 30 Threshold Detectors . 31 SMB Alert 32 External Clock Control (16 Pin WLCSP) . 37 Voltage Margin / DAC OUT (20 Pin QFN) 38 2 C Serial Interface 39 SMBus/I Protocol Conventions 39 SMBus and PMBus Support . 40 Device Addressing . 40 Write Operation . 41 Read Operation . 41 Group Command 41 Clock Speed 42 Signal Integrity . 42 Fast Transients 42 External Clock . 43 Overranging 44 Shunt Resistor Selection 44 A Trace as a Sense Resistor . 47 Lossless Current Sensing (DCR) 48 Revision History 49 Package Outline Drawings 50 FN8388 Rev.6.01 Page 2 of 51 Feb 22, 2022