DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl6373 ISL6373 FN8350 Rev 0.00 EAPP Hybrid Digital 4-Phase Green PWM Controller for Digital Power May 13, 2013 Management of Core and Memory with AUTO Phase Shedding The ISL6373 is an EAPP Hybrid Digital 4-Phase PWM Features controller and is designed to be compliant to Intel Intel VR12.5/VR12 compliant VR12.5/VR12 specifications and control the microprocessor core or memory voltage regulator. It includes programmable - SerialVID with programmable IMAX, TMAX, BOOT, functions and telemetries for easy use, high system flexibility ADDRESS OFFSET registers 2 and overclocking applications using SMBus, PMBus, or I C - VR12.5 core and VR12/VR12.5 memory interface, which is designed to be conflict free with CPUs SVID Intersils proprietary EAPP Hybrid Digital Enhanced Active bus. This hybrid digital approach eliminates the need of NVM Pulse Positioning (EAPP) Modulation Scheme (Patented) and Firmware often seen in a full digital solution and 2 - SMBus/PMBus/I C interface with SVID conflict free significantly reduces design complexity, inventory and - NVM and firmware free for low cost and easy use manufacturing costs. - Auto phase shedding option for greener environment The ISL6373 utilizes Intersils proprietary Enhanced Active - Variable frequency control during load transients to Pulse Positioning (EAPP) modulation scheme to achieve the reduce beat frequency oscillation extremely fast transient response with fewer output - Linear control with evenly distributed PWM pulses for capacitors. The ISL6373 accurately monitors the load current better phase current balance during load transients via the IMON pin and reports this information via the IOUT register to the microprocessor, which sends a PSI signal to - Voltage feed-forward and ramp adjustable options the controller at low power mode via SVID bus. The controller - High frequency and PSI compensation options enters 1- or 2-phase operation in low power mode (PSI1) in - Proprietary active phase adding and dropping with diode the ultra low power mode (PSI2, PSI3), it operates in single emulation scheme for enhanced light load efficiency phase with diode emulation option. In low power modes, the 1 to 4-phase with phase doubler compatibility magnetic core and switching losses are significantly reduced, yielding high efficiency at light load. After the PSI signal is Differential remote voltage sensing de-asserted, the dropped phase(s) are added back to sustain 0.5% closed-loop system accuracy over load, line and heavy load transient response and efficiency. In addition, the temperature ISL6373 features auto-phase shedding to optimize the Programmable 1 or 2-phase operation in PSI1 mode efficiency from light to full load for Green Environment without sacrificing the transient performance. Programmable slew rate of fast dynamic VID with Dynamic VID Compensation (DVC) Todays microprocessors require a tightly regulated output Droop and diode emulation options voltage position versus load current (droop). The ISL6373 senses the output current continuously by measuring the Precision resistor or DCR differential current sensing voltage across a dedicated current sense resistor or the DCR of - Integrated programmable current sense resistors the output inductor. The sensed current flows out of the FB pin - Accurate load-line (droop) programming to develop the precision voltage drop across the feedback - Accurate current monitoring and channel-current resistor for droop control. Current sensing circuits also provide balancing the needed signals for channel-current balancing, average overcurrent protection and individual phase current limiting. True Catastrophic Failure Protection (CFP) The TM pin senses an NTC thermistors temperature, which is Average overcurrent protection and channel current limit with internally digitized for thermal monitoring and for integrated internal current comparators thermal compensation of the current sense elements of the Precision overcurrent protection on IMON pin regulator. Output voltage open sensing protection The ISL6373 features remote voltage sensing and completely eliminates any potential difference between remote and local Protection disable option grounds. This improves regulation and protection accuracy. Accurate load-line (droop) programming The threshold-sensitive enable input is available to accurately Up to 2MHz per phase coordinate the start-up of the ISL6373 with other voltage rails. Thermal monitoring and integrated compensation Start-up into pre-charged load Pb-free (RoHS compliant) FN8350 Rev 0.00 Page 1 of 2 May 13, 2013ISL6373 Copyright Intersil Americas LLC 2013. 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 FN8350 Rev 0.00 Page 2 of 2 May 13, 2013