DATA SHORT To request the full datasheet, please visit www.intersil.com/products/ISL95857 ISL95857 FN8750 Rev 2.00 February 11, 2016 1+2+1 Voltage Regulator for Intel IMVP8TM CPUs Features Compliant with Intel IMVP8TM, the ISL95857 provides a complete power solution for Intel microprocessors supporting core, graphics and system agent rails. The controller provides control and protection for three Voltage Regulator (VR) outputs. VR A and VR C outputs support 1-phase operation only, while VR B is configurable for 2- or 1-phase operation. The address options programmable for these three outputs allow for maximum flexibility in support of the IMVP8TM CPU. All three VRs share a common serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with a two-chip approach. * Supports Intel serial data bus interface * System input power monitor (PSYS) supported * Three output controller - VR A supports 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 Based on Intersil's Robust Ripple Regulator (R3TM) technology, the R3TM modulator has many advantages compared to traditional modulators. These include faster 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. * Supports multiple current sensing methods - Lossless inductor DCR current sensing - Precision resistor current sensing * Differential remote voltage sensing * Programmable SVID address The ISL95857 has several other key features. The controller provides PWM outputs, which support Intel DrMOS power stages (or similar) and discrete power stages using the Intersil ISL95808 high voltage synchronous rectified buck MOSFET driver. The controller complies with IMVP8TM PS4 power requirements and supports power stages and drivers which are compatible. The ISL95857 supports the system input power monitor (PSYS) option. The controller supports either DCR current sensing with a single NTC thermistor for DCR temperature compensation or more precision through resistor current sensing if desired. All three outputs feature remote voltage sense, programmable IMAX, adjustable switching frequency, OC protection and a single VR_READY power-good indicator. 0.91 Applications * IMVP8 compliant notebooks, desktops, ultrabooks and tablets 0.91 0.91 0.90 0.90 0.90 0.89 0.89 0.88 VIN = 12V 0.88 VIN = 6V VIN = 21V 0.89 VIN = 12V VIN = 6V VIN = 21V 0.86 0.87 0.85 0.86 0.85 0.83 0 5 10 15 20 25 FIGURE 1A. VCORE/VR A LOAD LINE = 2.4m 0.82 VIN = 6V VIN = 21V 0.86 0.84 0.85 VIN = 12V 0.88 0.87 0.87 0.84 * Resistor programmable address selection, IMAX and switching frequency 0 5 10 15 20 25 30 35 FIGURE 1B. VGT/VR B LOAD LINE = 2m 40 0.84 0 1 2 3 4 5 FIGURE 1C. VSA/VR C LOAD LINE = 10.3m FIGURE 1. LOAD LINE REGULATION FN8750 Rev 2.00 February 11, 2016 6 Page 1 of 2 ISL95857 (c) Copyright Intersil Americas LLC 2016. 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 FN8750 Rev 2.00 February 11, 2016 Page 2 of 2