DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl95816a ISL95816A FN8599 Rev 1.00 4-Phase PWM Controller for VR12.5 and VR12.6 CPUs January 14, 2014 The ISL95816A Pulse Width Modulation (PWM) controller IC Features provides a complete solution for VR12.5 and 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 4-, 3-, 2- or 1-phase operate in 4-, 3-, 2- or 1-phase configurations. The VR uses a R3 Modulator serial control bus to communicate with the CPU and achieve - Excellent transient response lower cost and smaller board area. - High light load efficiency The VR utilizes Intersils Robust Ripple Regulator 0.5% System accuracy over-temperature R3 Technology. The R3 modulator has numerous Supports multiple current sensing methods advantages compared to traditional modulators, including faster transient response, variable switching frequency during - Lossless inductor DCR current sensing load transients, and improved light load efficiency due to its - Precision resistor current sensing ability to automatically change switching frequency. Differential remote voltage sensing The ISL95816A has several other key features. It supports Programmable V voltage at start-up BOOT either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precise resistor Resistor programmable I , V , voltage transition slew MAX BOOT current sensing if desired remote voltage sense rate and switching frequency programmable V voltage, I voltage transition slew BOOT MAX, Adaptive body diode conduction time reduction rate and switching frequency adjustable overcurrent Low supply current in PS4 state protection and Power-Good signal. Applications VR12.5 and VR12.6 notebook and desktop computers VDD +5V VIN Vin DRCTRL BIAS VIN L4 PWM PHASE PWM4 Power Stage GND 1.82 LOADLINE, V = 1.8V, PS0 O BIAS VIN L3 1.80 PWM3 PWM PHASE V Power Stage MAX GND Vcore 1.78 ISL95816A BIAS VIN V = 6V L2 IN PWM2 PWM PHASE 1.76 Power Stage GND V = 12.6V IN 1.74 V MIN BIAS VIN L1 V = 19V IN PWM1 PWM PHASE Power Stage 1.72 PHASE1 0 10 20 30 40 GND I (A) OUT FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT FIGURE 2.LOAD LINE REGULATION FN8599 Rev 1.00 Page 1 of 2 January 14, 2014 V (V) OUT ISL95816A Copyright Intersil Americas LLC 2013-2014. 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 FN8599 Rev 1.00 Page 2 of 2 January 14, 2014