DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl6376 ISL6376 FN8298 Rev 0.00 EAPP Hybrid Digital 6-Phase Green PWM Controller for Digital Power May 13, 2013 Management of Core and Memory With AUTO Phase Shedding The ISL6376 is an EAPP Hybrid Digital 6-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. It includes programmable functions and - SerialVID with programmable IMAX, TMAX, BOOT, telemetries for easy use, high system flexibility and ADDRESS OFFSET registers 2 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 ISL6376 utilizes Intersils proprietary Enhanced Active Pulse - Variable frequency control during load transients to Positioning (EAPP) modulation scheme to achieve the extremely reduce beat frequency oscillation fast transient response with fewer output capacitors. The - Linear control with evenly distributed PWM pulses for ISL6376 accurately monitors the load current via the IMON pin better phase current balance during load transients and reports this information via the IOUT register to the microprocessor, which sends a PSI signal to the controller at - Voltage feed-forward and ramp adjustable options low power mode via SVID bus. The controller enters 1- or - High frequency and PSI compensation options 2-phase operation in low power mode (PSI1) in the ultra low - Proprietary active phase adding and dropping with diode power mode (PSI2,PSI3), it operates in single phase with diode emulation scheme for enhanced light load efficiency emulation option. In low power modes, the magnetic core and 1 to 6-phase with phase doubler compatibility switching losses are significantly reduced, yielding high efficiency at light load. After the PSI signal is de-asserted, the Differential remote voltage sensing dropped phase(s) are added back to sustain heavy load 0.5% closed-loop system accuracy over load, line and transient response and efficiency. In addition, the ISL6376 temperature features auto-phase shedding to optimize the efficiency from Programmable 1 or 2-phase operation in PSI1 mode 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 voltage Droop and diode emulation options position versus load current (droop). The ISL6376 senses the output current continuously by measuring the voltage across a Precision resistor or DCR differential current sensing dedicated current sense resistor or the DCR of the output - Integrated programmable current sense resistors inductor. The sensed current flows out of the FB pin to develop the - Accurate load-line (droop) programming precision voltage drop across the feedback resistor for droop - Accurate current monitoring and channel-current control. Current sensing circuits also provide the needed signals balancing for channel-current balancing, average overcurrent protection and individual phase current limiting. The TM pin senses an NTC True Catastrophic Failure Protection (CFP) thermistors temperature, which is internally digitized for thermal Average overcurrent protection and channel current limit with monitoring and for integrated thermal compensation of the internal current comparators current sense elements of the regulator. Precision overcurrent protection on IMON pin The ISL6376 features remote voltage sensing and completely Output voltage open sensing protection eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The Protection disable option threshold-sensitive enable input is available to accurately Accurate load-line (droop) programming coordinate the start-up of the ISL6376 with other voltage rails. Up to 2MHz per phase Thermal monitoring and integrated compensation Start-up into pre-charged load Pb-free (RoHS compliant) FN8298 Rev 0.00 Page 1 of 2 May 13, 2013ISL6376 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 FN8298 Rev 0.00 Page 2 of 2 May 13, 2013