DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl6374 ISL6374 FN8326 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 ISL6374 is an EAPP Hybrid Digital 4-Phase PWM controller Features and is designed to be compliant to Intel VR12.5/VR12 Intel VR12.5/VR12 compliant specifications and control the microprocessor core or memory voltage regulator. - SerialVID with programmable IMAX, TMAX, BOOT, ADDRESS OFFSET registers The ISL6374 utilizes Intersils proprietary Enhanced Active Pulse - VR12.5 core and VR12/VR12.5 memory Positioning (EAPP) modulation scheme to achieve the extremely - Intersils proprietary EAPP Hybrid Digital Enhanced Active fast transient response with fewer output capacitors. The Pulse Positioning (EAPP) Modulation Scheme (Patented) ISL6374 accurately monitors the load current via the IMON pin and reports this information via the IOUT register to the - NVM and firmware free for low cost and easy use microprocessor, which sends a PSI signal to the controller at - Auto phase shedding option for greener environment low power mode via SVID bus. The controller enters 1- or - Variable frequency control during load transients to 2-phase operation in low power mode (PSI1) in the ultra low reduce beat frequency oscillation power mode (PSI2, PSI3), it operates in single phase with diode - Linear control with evenly distributed PWM pulses for emulation option. In low power modes, the magnetic core and better phase current balance during load transients switching losses are significantly reduced, yielding high - Voltage feed-forward and ramp adjustable options efficiency at light load. After the PSI signal is de-asserted, the dropped phase(s) are added back to sustain heavy load - High frequency and PSI compensation options transient response and efficiency. In addition, the ISL6374 - Proprietary active phase adding and dropping with diode features auto-phase shedding to optimize the efficiency from emulation scheme for enhanced light load efficiency light to full load for Green Environment without sacrificing the 1 to 4-Phase with phase doubler compatibility transient performance. Differential remote voltage sensing Todays microprocessors require a tightly regulated output voltage 0.5% closed-loop system accuracy over load, line and position versus load current (droop). The ISL6374 senses the temperature output current continuously by measuring the voltage across a dedicated current sense resistor or the DCR of the output Programmable 1 or 2-phase operation in PSI1 mode inductor. The sensed current flows out of the FB pin to develop the Programmable slew rate of fast dynamic VID with Dynamic precision voltage drop across the feedback resistor for droop VID Compensation (DVC) control. Current sensing circuits also provide the needed signals Droop and diode emulation options for channel-current balancing, average overcurrent protection and individual phase current limiting. The TM pin senses an NTC Precision resistor or DCR differential current sensing thermistors temperature, which is internally digitized for thermal - Integrated programmable current sense resistors monitoring and for integrated thermal compensation of the - Accurate load-line (droop) programming current sense elements of the regulator. - Accurate current monitoring and channel-current The ISL6374 features remote voltage sensing and completely balancing eliminates any potential difference between remote and local True Catastrophic Failure Protection (CFP) grounds. This improves regulation and protection accuracy. The Average overcurrent protection and channel current limit with threshold-sensitive enable input is available to accurately internal current comparators coordinate the start-up of the ISL6374 with other voltage rails. Precision overcurrent protection on IMON pin Output voltage open sensing protection Protection disable option Accurate load-line (droop) programming Up to 2MHz per phase Thermal monitoring and integrated compensation Start-up into pre-charged load Pb-free (RoHS compliant) FN8326 Rev 0.00 Page 1 of 2 May 13, 2013ISL6374 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 FN8326 Rev 0.00 Page 2 of 2 May 13, 2013