fn8969 rev.0.00 page 1 of 2 oct 16, 2017 fn8969 rev.0.00 oct 16, 2017 ISL95855C 3+2+1 voltage regulator with expanded iccmax register range sup porting imvp8 cfl/cnl cpus data short to request the full datasheet, please visit www.intersil.com/products/ISL95855C the ISL95855C is compliant with imvp8?, and provides a complete power solution for intel microprocessors supporting co re, graphics, and system agent rails. the controlle r provides control and protection for three voltage regulator (vr) outputs. the vr a output can be configur ed for 3-, 2-, or 1-phase operation. vr b is configur able for 2- or 1-phase operation, and vr c supports 1-phase operation. the address options for these three outputs allow for maximum flexibility to s upport the imvp8 cpu. all three vrs share a comm on serial control bus to communicate with the cpu and achieve lower cost and smaller board area compared w ith a two-chip approach. the ISL95855C has expanded iccmax register tables for vr a and vr c to support intel cfl-h. based on intersils robust ripple regulator (r3?) technology, the r3 modulator has many advantages compared to traditional modul ators. these include faster transient settling time, variable switching frequency in response to load transient s, and improved light-load efficiency due to diod e emulation mode with load-dependent low switching frequency. the ISL95855C has several other key features. the controller provides pwm out puts, which support intel drmos power stages (or sim ilar) and discrete power stages using the intersil isl95808 high voltage synchronous rectified bu ck mosfet driver. the controller complies with imvp8 ps4 power requirements and supports c ompatible power stages and drivers. the controller supports dcr current sensing with a single ntc thermis tor for dcr temperature compensation, or more precision through resistor current sensing. features ? supports intel seri al data bus interface ? fully supports ps4 power domain entry and exit ? supports system input power monitor (psys) ? three output controller ? vr a configurable for 3-, 2-, 1-phase vr design ? vr b configurable for 2-, 1-phase vr design ? vr c supports 1-phase vr design ? 0.5% system accuracy over temperature ? low supply current in ps4 state ? supports multiple current sensing methods ? lossless inductor dcr current sensing ? precision resistor current sensing ? differential remote voltage sensing ? programmable svid address ? programmable v boot voltage at start-up ? resistor programmable address selection, i max , slew rate, switching frequency, and droop ? adaptive body diode conduction time reduction applications ? imvp8 compliant notebooks, desktops, ultrabooks, and tablets ? supports higher iccmax range of cfl-h cpus related literature ? for a full list of related documents, visit our website ? ISL95855C product page figure 1. load line regulation 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90 0.91 30 36 42 48 54 60 66 i out (a) v out (v) 06121824 v in = 19v v in = 12v v in = 8v
fn8969 rev.0.00 page 2 of 2 oct 16, 2017 ISL95855C 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 on ly. intersil may modify the circuit design an d/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. accordi ngly, the reader is cautioned to verify that datasheets are current befo re placing orders. information furnished by intersil is beli eved to be accurate and r eliable. however, no responsibility is assumed by intersil or its subsidiaries for it s 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 righ ts of intersil or its subsidiari es. for information regarding intersil corporation and its products, see www.intersil.com for additional products, see www.intersil.com/en/products.html ? copyright intersil americas llc 2017. all rights reserved. all trademarks and registered trademarks are the property of their respective owners.
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