DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl95820 Green Hybrid Digital Four Phase PWM Controller for Intel VR12.5™ CPUs ISL95820 Features The ISL95820 Pulse Width Modulation (PWM) controller IC provides a complete low-cost solution for Intel VR12.5™ compliant microprocessor core power supplies. It provides the control and protection for a Voltage Regulator (VR). The VR incorporates 3 integrated drivers and can operate in 4-, 3-, 2or 1-phase configurations. The VR uses a serial control bus to communicate with the CPU and achieve lower cost and smaller board area. • Serial data bus • SMBus/PMBus/I2C interface with SVID conflict free • Configurable 4-, 3-, 2- or 1-phase for the output using three integrated gate drivers • Green Hybrid Digital R3™ modulator - Excellent transient response - Phase shedding with power state selection - Diode emulation in single-phase for high light-load efficiency • 0.5% system accuracy over-temperature The VR utilizes Intersil’s Robust Ripple Regulator R3 Technology™. The R3™ modulator has many advantages compared to traditional modulators, including faster transient response, 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 The ISL95820 has several other key features. It supports either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precise resistor current sensing if desired; remote voltage sense; programmable VBOOT voltage, IMAX, voltage transition slew rate and switching frequency; adjustable overcurrent protection; and Power-Good signal. • Differential remote voltage sensing • Programmable VBOOT voltage at start-up • Resistor programmable IMAX, load line, diode emulation, slope compensation, and switching frequency • Adaptive body diode conduction time reduction Applications • Intel VR12.5 desktop computers VIN PHASE4 INTERSIL DRIVER VIN VCORE PHASE3 ISL95820 VIN PHASE2 VIN PHASE1 FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT October 15, 2013 FN8318.1 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 2013. All Rights Reserved Intersil (and design) and R3 Technology are trademarks owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL95820 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 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 Submit Document Feedback 2 FN8318.1