DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl95833 Dual 2+1 PWM Controller for IMVP-7/VR12 CPUs ISL95833 Features The ISL95833 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, typically for VCORE, incorporates 1 integrated driver and can operate in 2- or 1-phase configurations. The second VR, typically for Graphics, is a single phase regulator incorporating an integrated driver. 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 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. • 0.5% System Accuracy Over-Temperature The ISL95833 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. • Programmable VBOOT Voltage at Start-up • Dual Outputs: - Configurable 2- or 1-phase for the 1st Output using one Integrated Gate Driver - 1-phase for the 2nd Output using an Integrated Gate Driver • R3 Modulator - Excellent Transient Response - High Light Load Efficiency • Supports Multiple Current Sensing Methods - Lossless Inductor DCR Current Sensing - Precision Resistor Current Sensing • Differential Remote Voltage Sensing • Resistor Programmable IMAX, Switching Frequency for Both Outputs • Adaptive Body Diode Conduction Time Reduction Applications • IMVP-7/VR12 Compliant Computers VIN VR2 0.91 VIN 0.89 0.88 VOUT (V) VR1 ISL95833 VIN = 19V 0.90 ISL6208 DRIVER 0.87 0.86 0.85 0.84 0.83 VIN VIN = 12V 0.82 VIN = 8V 0.81 0.80 0 6 12 18 24 30 36 42 48 54 60 66 IOUT (A) FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT August 22, 2012 FN7837.2 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. 2011, 2012. 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. ISL95833 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 FN7837.2 August 22, 2012