ISL8272MEVAL2Z

USER’S MANUAL lSL8272MEVAL2Z UG004 Rev 0.00 October 20, 2014 Evaluation Board User Guide Description Key Features The ISL8272M is a 50A step-down DC/DC power supply module with an integrated digital PWM controller, dual-phase synchronous power switches, inductors and passives. Only input, output capacitors and minimal passives are needed to finish the design. 50A of continuous output current can be delivered without a need of airflow or heatsink. The ISL8272M uses ChargeMode™ control (ASCR) architecture, which responds to a transient load within a single switching cycle. • VIN range of 4.5V to 14V, VOUT adjustable from 0.6V to 5V The ISL8272MEVAL2Z evaluation board has three ISL8272M modules connected in a current sharing configuration to deliver 150A continuous output current. This evaluation board comes with placeholders for pin-strap resistor to adjust output voltage, soft-start timing, input UVLO threshold, control loop response, current sharing configurations, and device PMBus™ address. More configurations, such as Digital-DC™ (DDC) bus configuration and fault limits can be easily programmed or changed via PMBus compliant serial bus interface. ZLUSBEVAL3Z (USB to PMBus adapter) is provided with this evaluation kit, which connects the evaluation board to a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the PowerNavigator™ evaluation software from a PC running Microsoft Windows. • Programmable VOUT, VOUT droop, margining, input and output UVP/OVP, IOUT limit, OTP/UTP, soft-start, sequencing, and external synchronization • Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency and faults • ChargeMode™ control tunable with PMBus • Output FETs for load transient response evaluation • Mechanical switch for enable and power-good LED indicator Specifications This board has been configured for the following operating conditions by default: • VIN = 5V TO 12V • VOUT = 1.2V • IMAX = 150A • fSW = 421kHz • 3-module current sharing with 0.1mV/A VOUT droop • Output ripple: