1 datasheet to request the full datasheet, please visit www.intersil.com/products/ISL95858 3+2 multiphase pwm regulator for intel imvp8? desktop cpus ISL95858 compliant with intel imvp8?, the ISL95858 provides a complete power solution for desktop microprocessors supporting both the core (ia) and graphics (gt) rails. the controller provides control and protection for one voltage regulator (vr), which can be configured for 3-, 2- or 1-phase operation. the second vr is co nfigurable for 2- or 1-phase operation. the vrs feature a pr ogrammable svid address to allow maximum flexibility in supporting desktop processor skus. both controller outputs share a common serial control bus to communicate with the cpu and ac hieve lower cost and smaller board area compared with a two-chip approach. based on intersil?s robust ripple regulator r3? technology, the r3? modulator has many advantages compared to traditional modulators. these include fast er transient settling time, variable switching frequency in response to load transients and improved light-load efficiency due to diode emulation mode with load-dependent low switching frequency. the ISL95858 has several other key features. the controller features three integrated +12v gate drivers with two drivers on the vr b output. the controlle r supports either dcr current sensing with a single ntc th ermistor for dcr temperature compensation or more precision through resistor current sensing if desired. both output s feature remote voltage sense, programmable i max , adjustable switching frequency, oc protection and single vr_ready power-good indicator. features ? supports intel serial data bus interface ? smbus/pmbus/i 2 c interface with svid conflict free ? green hybrid digital r3? modulator - excellent transient response - phase shedding with power state selection - diode emulation in single-phase for high light-load efficiency ? dual output controller - voltage regulator a: 3-, 2-, or 1-phase designs with two +12v integrated gate drivers - voltage regulator b: 2-, or 1-phase designs with one +12v integrated gate driver ? 0.5% system accuracy over-temperature ? supports multiple current sensing methods - lossless inductor dcr current sensing - precision resistor current sensing ? differential remote voltage sensing ? resistor programmable address selection, i max and switching frequency for both outputs ? adaptive body diode conduction time reduction applications ? imvp8? compliant desktops figure 1. vr a efficiency vs load figure 2. vr b efficiency vs load efficiency (%) load current (a) 40 50 60 70 80 90 100 0 102030405060 ps0 ps1 ps2 efficiency (%) load current (a) 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 ps2/3 ps1 ps0 july 2, 2015 fn8739.1 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas llc 2015. all rights reserved intersil (and design) and r3 technology are trademarks ow ned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners.
ISL95858 2 intersil products are manufactured, assembled and tested utilizing iso9001 quality systems as noted in the quality certifications found at www.intersil.com/en/suppor t/qualandreliability.html intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware 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 responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents 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 i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn8739.1 july 2, 2015 for additional products, see www.intersil.com/en/products.html submit document feedback
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