DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl95825 ISL95825 FN8329 Rev 0.00 Three Phases PWM Controller for VR12.5/VR12.6 CPUs December 17, 2013 The ISL95825 Pulse Width Modulation (PWM) controller IC Features provides a complete solution for VR12.5/VR12.6 Serial data bus compliant microprocessor core power supplies. It provides the control and protection for a Voltage Regulator (VR). The VR can Configurable 3-, 2- or 1-phase for the output operate in 3-, 2- or 1-phase configurations. The VR uses a serial R3 Modulator control bus to communicate with the CPU and achieve lower cost - Excellent transient response and smaller board area. - High light load efficiency The VR utilizes Intersils Robust Ripple Regulator R3 0.5% system accuracy over-temperature Technology. The R3 modulator has numerous advantages compared to traditional modulators, including faster transient Supports multiple current sensing methods response, variable switching frequency during load transients, - Lossless inductor DCR current sensing and improved light load efficiency due to its ability to - Precision resistor current sensing automatically change switching frequency. Differential remote voltage sensing The ISL95825 has several other key features. It supports either DCR current sensing with a single NTC thermistor for Resistor programmable I , V at start-up, voltage CCMAX BOOT DCR temperature compensation, or more precise resistor transition slew rate and switching frequency current sensing if desired. The output comes with remote Adaptive body diode conduction time reduction voltage sense, programmable V voltage, I voltage BOOT CCMAX, Low supply current at PS4 state transition slew rate and switching frequency, adjustable overcurrent protection and Power-Good signal. Applications VR12.5/VR12.6 notebook and desktop computers VDD +5V 1.82 VIN V IN LOADLINE = 1.5m, V = 1.8V, PS0 OUT VIN L3 1.80 PWM3 PHASE PWM V POWER STAGE MAX GND V = 6V IN 1.78 ISL95825 VIN V = 19V L2 IN V CORE PWM2 PWM PHASE 1.76 POWER STAGE GND V MIN V = 12V IN 1.74 VIN L1 PWM1 PWM PHASE 1.72 0 10 20 30 40 POWER STAGE GND I (A) OUT FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT FIGURE 2. LOAD LINE REGULATION FN8329 Rev 0.00 Page 1 of 2 December 17, 2013 V (V) OUTISL95825 Copyright Intersil Americas LLC 2013. 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 FN8329 Rev 0.00 Page 2 of 2 December 17, 2013