ODUCT OBSOLETE PR PLACEMENT RE D DE NO RECOMMEN t Center at ordatasheet, To request thepp full please visit www.intersil.com/products/isl6248A nical Su contact our Tech www.intersil.com/tsc or IL RS 1-888-INTE ISL6248A Data Sheet March 9, 2006 A Mobile Multiphase PWM Controller with Precision Current Sensing The ISL6248A provides microprocessor core-voltage regulation by driving up to four interleaved synchronousrectified buck-converter channels in parallel. Multiphase buck converter architecture uses interleaved timing to multiply ripple frequency and reduce input and output ripple currents. The reduction in ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area. The ISL6248A multiphase controller together with ISL6207 gate drivers forms the basis for a portable power supply solution to power Intel’s next generation mobile microprocessors. Intel Mobile Voltage Positioning (IMVP) is a smart voltage regulation technology which effectively reduces power dissipation in Intel® Pentium® Processors. The ISL6248A supports the IMVP-5 mobile processor voltage regulation specifications. To boost battery life, the ISL6248A operates in Active, Deep Sleep, or Deeper Sleep modes, depending upon the logic levels at the DSEN# and DRSEN pins. A 6-bit digital-to-analog converter (DAC) allows dynamic adjustment of the core output voltage from 0.8375V to 1.6V. To improve efficiency, the ISL6248A allows users to select one of two popular lossless current sense techniques. The ISL6248A supports detection via inductor coil resistance (DCR), or the rDS(ON) of the lower MOSFET. Either cost and space-saving method provides feedback for precision droop, channel current balancing, and individual channel overcurrent protection. A unity gain, differential amplifier is provided for remote voltage sensing. The differential amplifier eliminates errors due to potential differences between remote and local grounds. Eliminating ground differences improves regulation and protection accuracy. The channel switching frequency is adjustable in the range of 200kHz to 1.0MHz, providing flexibility in managing the balance between high-speed response, target efficiency, and good thermal management. FN9138.1 Features • Precision Multiphase Core Voltage Regulation - 0.75% System Accuracy Over Temperature • Microprocessor Voltage Identification Input - 6-Bit VID Input - 0.8375V to 1.600V in 12.5mV Steps - Supports VID Changes During Operation • Multiple Current Sensing Approaches Supported - Lossless DCR Current Sensing - Precision Resistive Current Sensing - Low Cost rDS(ON) Current Sensing • Excellent Dynamic Response - Combined Input Voltage Feed-Forward and Pulse-byPulse Average Current Mode • DSEN# and DRSEN Logic Inputs for Low Power States • DSV Voltage Input for DEEP SLEEP Mode • DRSV Voltage Input for DEEPER SLEEP Mode • Active Channel Current Balancing • Differential Remote Voltage Sensing • Individual Channel Overcurrent, Overvoltage, and Undervoltage Protection • 2, 3, or 4-Phase Operation • User selectable Switching Frequency of 200K - 1.0MHz - 400kHz - 4MHz Effective Ripple Frequency • QFN Package Option - QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline - QFN Near Chip Scale Package Footprint; Improves PCB Efficiency, Thinner in Profile • Pb-Free Plus Anneal Available (RoHS Compliant) Applications • Notebook Computer IMVP-5 DC/DC Converter 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark of Intersil Americas LLC Copyright © Intersil Americas LLC 2003, 2006. All Rights Reserved.. All other trademarks mentioned are the property of their respective owners. ISL6248A All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets 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 2 FN9138.1 March 9, 2006