fn7977 rev 0.00 page 1 of 2 january 17, 2013 fn7977 rev 0.00 january 17, 2013 ISL95831C 3+1 voltage regulator for imvp-7/vr12? cpus data short to request the full datasheet, please visit www.intersil.com/products/ISL95831C compliant with imvp-7/vr12?, the ISL95831C provides a complete solution for microprocessor and graphic processor core power supply. it provides two voltage regulators (vrs) with three integrated gate drivers. the first vr can be configured as 3-, 2- or 1-phase vr while the second output is 1-phase vr, providing maximum flexibility. the two vrs share the serial control bus to communicate with the cpu and achieve lower cost and smaller board area compared with the two-chip approach. based on intersil?s robust ripple regulator (r3) technology?, the pwm modulator compared to traditional modulators, has faster transient settling time, variable switching frequency during load transients and has improved light load efficiency with it?s ability to automatically change switching frequency. the ISL95831C has several other key features. both outputs support dcr current sensing with single ntc thermistor for dcr temperature compensation or accurate resistor current sensing. both outputs come with remote voltage sense, programmable v boot voltage, programmable i max , t max , adjustable switching frequency, oc protection and separate power-good. features ?serial data bus ?dual outputs: - configurable 3-, 2- or 1-phase for the 1st output using 2 integrated gate drivers - 1-phase for the 2nd output using an 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 ?programmable v boot voltage at start-up ? resistor programmable i max , t max for both outputs ? adaptive body diode conduction time reduction applications ? imvp-7/vr12 compliant computers 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 figure 1. load line regulation
fn7977 rev 0.00 page 2 of 2 january 17, 2013 ISL95831C 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 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. accordingly, the reader is cautioned to verify that datasheets are current before placing orders. information fu rnished by intersil is believed to be accu rate and reliable. however, no responsib ility is assumed by intersil or its subsidiaries for its use; nor for any infrin gements 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 for additional products, see www.intersil.com/en/products.html ? copyright intersil americas llc 2013. all rights reserved. all trademarks and registered trademarks are the property of their respective owners.
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