DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl6388 ISL6388 FN8571 Rev 0.00 Advanced Linear EAPP Digital 6-Phase Green PWM Controller for Digital Power Apr 15, 2014 Management With NVM and AUTO Phase Shedding The ISL6388 is a smart and smallest 6-Phase Green PWM Features controller, designed to be compliant to Intel VR12.5/VR12 Intel VR12.5/VR12 compliant for core and memory specifications and control the microprocessor core or memory voltage regulator. It includes programmable functions and - Programmable IMAX, TMAX, BOOT, DVID rate, address 2 telemetries for easy use, system flexibility and over-clocking SMBus/PMBus/I C compatible 2 applications using SMBus, PMBus, or I C interface, which is - Up to 1.5MHz bus interface with SVID conflict free designed to be conflict free with CPUs SVID bus and to - NVM to store up to 8 configurations with programmable program NVM banks up to 8 different compensations and frequency, droop, auto, faults (OCP, UVP, CFP), etc. system parameters. This minimizes external components and significantly reduces design complexity and PCB area, and - No firmware required and hassle free with checksum simplifies the manufacturing process. Advanced Linear EAPP Digital control scheme (patented) - Digitally programmable compensation The ISL6388 utilizes Intersils proprietary Advanced Linear EAPP (Enhanced Active Pulse Positioning) Digital control scheme to - Auto phase shedding option for greener environment achieve the extremely fast linear transient response with fewer - Variable frequency control during load transients to reduce output capacitors and overcomes many hurdles of traditional beat frequency oscillation digital approach, which uses non-linear, discrete control method - Linear control with evenly distributed PWM pulses for better for both voltage loop and current balance loop and runs into beat phase current balance during load transients frequency oscillation and non-linear response. The ISL6388 - Voltage feed-forward and ramp adjustable options accurately monitors the load current via the IMON pin and - High frequency and PSI compensation reports this information via the I register to the OUT - Active phase adding and dropping with diode emulation microprocessor, which sends a PSI signal to the controller at scheme for enhanced light load efficiency low power mode via SVID bus. The controller enters 1- or Phase doubler and coupled-inductor compatibility 2-phase operation in low power mode (PSI1) in the ultra low Differential remote voltage sensing with 0.5% accuracy power mode (PSI2, PSI3), it operates in single phase with diode Programmable 1- or 2-phase operation in PSI1 mode emulation option. In low power modes, the magnetic core and switching losses are significantly reduced, yielding high Programmable slew rate of fast dynamic VID with dynamic VID efficiency at light load. After the PSI signal is de-asserted, the compensation (DVC) dropped phase(s) are added back to sustain heavy load Support 5V PWM or 3.3V PWM DrMOS and driver transient response and efficiency. In addition, the ISL6388 Zero current shutdown with ISL6627 features auto-phase shedding to optimize the efficiency from light to full load for Greener Environment without sacrificing the Precision resistor or DCR differential current sensing transient performance. - Accurate load-line (Droop) programming and control The ISL6388 senses the output current continuously by a - Accurate current monitoring and channel-current balancing dedicated current sense resistor or the DCR of the output with calibration capability inductor. The sensed current flows through a digitally True input current sensing for catastrophic failure protection programmable 1% droop resistor for precision load-line control. Average overcurrent protection and channel-current limiting Current sensing circuits also provide the needed signals for High common mode current sense input (VCC-1.5V) channel-current balancing, average overcurrent protection and individual phase current limiting. The TM pin senses an NTC Open sensing and single point of loop failure protection thermistors temperature, which is internally digitized for thermal Thermal monitoring and integrated compensation monitoring and for integrated thermal compensation of the 1- to 6-Phase option and up to 2MHz per phase current sense elements of the regulator. Start-up into pre-charged load The ISL6388 features remote voltage sensing and completely Pb-Free (RoHS Compliant) 40 Ld 5x5 Plastic Package eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The Applications threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6388 with other voltage rails. Core and memory for Intel VR12/VR12.5 based processor High performance server core or memory rail High performance graphic rail High-end desktop with over-clocking option FN8571 Rev 0.00 Page 1 of 2 Apr 15, 2014ISL6388 Copyright Intersil Americas LLC 2014. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil s sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com FN8571 Rev 0.00 Page 2 of 2 Apr 15, 2014