DATA SHORT To request the full datasheet, please visit www.intersil.com/products/is95838 ISL95838 FN7878 Rev 2.00 Dual 3+2 PWM Controller for IMVP-7/VR12 CPUs October 15, 2015 The ISL95838 Pulse Width Modulation (PWM) controller IC Features provides a complete solution for IMVP-7/VR12 compliant Serial Data Bus microprocessor and graphic processor core power supplies. It provides the control and protection for two Voltage Regulators Dual Outputs: (VRs). The first VR, typical for Vcore, incorporates 2 integrated - Configurable 3-, 2- or 1-phase for the 1st Output using two drivers and can operate in 3-, 2- or 1-phase configurations. The integrated Gate Drivers second VR, typical for Graphics, can operate in 2- or 1-phase - Configurable 2- or 1-phase for the 2nd Output configurations. The two VRs share a serial control bus to R3 Modulator communicate with the CPU and achieve lower cost and smaller board area compared with the two-chip approach. - Excellent Transient Response - High Light Load Efficiency Both VRs utilize Intersils Robust Ripple Regulator R3 Technology. The R3 modulator has numerous advantages 0.5% System Accuracy Over-Temperature 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 automatically change switching frequency. - Precision Resistor Current Sensing The ISL95838 has several other key features. Both outputs Differential Remote Voltage Sensing support either DCR current sensing with a single NTC Programmable V Voltage at Start-up BOOT thermistor for DCR temperature compensation, or more Resistor Programmable I , Switching Frequency for Both MAX precise resistor current sensing if desired. Both outputs come Outputs with remote voltage sense, programmable V voltage, BOOT I and switching frequency, adjustable overcurrent Adaptive Body Diode Conduction Time Reduction MAX, protection and separate Power-Good signals. Applications IMVP-7/VR12 Compliant Computers Vin VR2 ISL6208 DRIVER Vin 0.91 V = 19V IN ISL6208 0.90 DRIVER 0.89 0.88 0.87 Vin 0.86 VR1 0.85 ISL95838 ISL6208 0.84 DRIVER 0.83 V = 12V IN 0.82 Vin V = 8V IN 0.81 0.80 0612 18 24 30 36 42 48 54 60 66 I (A) OUT Vin FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT FIGURE 2. LOAD LINE REGULATION FN7878 Rev 2.00 Page 1 of 2 October 15, 2015 V (V) OUTISL95838 Copyright Intersil Americas LLC 2012-2015. 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 FN7878 Rev 2.00 Page 2 of 2 October 15, 2015