DATASHEET To request the full datasheet, please visit www.intersil.com/products/is95838 Dual 3+2 PWM Controller for IMVP-7/VR12™ CPUs ISL95838 Features The ISL95838 Pulse Width Modulation (PWM) controller IC provides a complete solution for IMVP-7/VR12™ compliant microprocessor and graphic processor core power supplies. It provides the control and protection for two Voltage Regulators (VRs). The first VR, typical for Vcore, incorporates 2 integrated drivers and can operate in 3-, 2- or 1-phase configurations. The second VR, typical for Graphics, can operate in 2- or 1-phase configurations. The two VRs share a serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two-chip approach. • Serial Data Bus • Dual Outputs: - Configurable 3-, 2- or 1-phase for the 1st Output using two integrated Gate Drivers - Configurable 2- or 1-phase for the 2nd Output • R3 Modulator - Excellent Transient Response - High Light Load Efficiency • 0.5% System Accuracy Over-Temperature Both VRs utilize Intersil’s Robust Ripple Regulator R3 Technology™. The R3 modulator has numerous advantages compared to traditional modulators, including faster transient response, variable switching frequency during load transients, and improved light load efficiency due to its ability to automatically change switching frequency. • Supports Multiple Current Sensing Methods - Lossless Inductor DCR Current Sensing - Precision Resistor Current Sensing • Differential Remote Voltage Sensing • Programmable VBOOT Voltage at Start-up • Resistor Programmable IMAX, Switching Frequency for Both Outputs The ISL95838 has several other key features. Both outputs support either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precise resistor current sensing if desired. Both outputs come with remote voltage sense, programmable VBOOT voltage, IMAX, and switching frequency, adjustable overcurrent protection and separate Power-Good signals. • Adaptive Body Diode Conduction Time Reduction Applications • IMVP-7/VR12 Compliant Computers Vin VR2 ISL6208 DRIVER Vin 0.91 ISL6208 DRIVER VIN = 19V 0.90 0.89 Vin VR1 ISL95838 ISL6208 DRIVER VOUT (V) 0.88 0.87 0.86 0.85 0.84 0.83 VIN = 12V 0.82 Vin VIN = 8V 0.81 0.80 0 6 12 18 24 30 36 42 48 54 60 66 IOUT (A) Vin FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT October 15, 2015 FN7878.2 1 FIGURE 2. LOAD LINE REGULATION 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 2012, 2015. 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. ISL95838 For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/design/quality 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 2 FN7878.2 October 15, 2015