ISL9500 To request the full datasheet, please visit www.intersil.com/products/isl9500 Data Sheet December 2, 2005 Precision Multi-Phase Buck PWM Controller FN9248.0 Features The ISL9500 multi-phase Buck PWM control IC, with integrated half bridge gate drivers, provides a precision voltage regulation system for microprocessors in notebook computers. Two-phase operation eases the thermal management issues and load demand of high performance processors. This control IC also features both input voltage feed-forward and average current mode control for excellent dynamic response, “Loss-less” current sensing using MOSFET rDS(ON) and user selectable switching frequencies from 250kHz to 1MHz per phase. The ISL9500 includes a 6-bit digital-to-analog converter (DAC) that dynamically adjusts the CORE PWM output voltage. The ISL9500 also has logic inputs to select Active, Deep Sleep and Deeper Sleep modes of operation. A precision reference, remote sensing and proprietary architecture, with integrated, processor-mode, compensated “Droop”, provide excellent static and dynamic CORE voltage regulation. To improve efficiency at light loading, the ISL9500 can be configured to run in single phase PWM in Active, Deep or Deeper Sleep modes of operation. Also, in Deep and Deeper sleep modes the ISL9500 will operate in diode emulation. • Diode Emulation Functionality in Deep and Deeper Sleep Modes for Improved Light Load Efficiency • Single and/or Two-phase Power Conversion • “Loss-less” Current sensing for Improved Efficiency and Reduced Board Area - Optional Discrete Precision Current Sense Resistor • Internal Gate-Drive and Boot-Strap Diodes • Precision CORE Voltage Regulation - 0.8% System Accuracy Over Temperature • 6-Bit Microprocessor Voltage Identification Input • Programmable “Droop” and CORE Voltage Slew Rate • Direct Interface with System Logic for Deep and Deeper Sleep modes of operation • Easily Programmable Voltage Setpoints for Initial “Boot”, Deep Sleep and Deeper Sleep Modes • Excellent Dynamic Response - Combined Voltage Feed-Forward and Average Current Mode Control • Overvoltage, Undervoltage and Overcurrent Protection • Power-Good Output with Internal Blanking during VID and Mode Changes Another feature of this IC controller is the PGOOD monitor circuit that is held low until CORE voltage increases, during its soft-start sequence, to within 12% of the “Boot” voltage. This PGOOD signal is masked during VID changes. Output overcurrent, overvoltage and undervoltage are monitored and result in the converter latching off and PGOOD signal being held low. The overvoltage and undervoltage thresholds are 112% and 84% of the VID, Deep or Deeper Sleep setpoint, respectively. Overcurrent protection features a 32 cycle overcurrent shutdown. PGOOD, overvoltage, undervoltage and overcurrent provide monitoring and protection for the microprocessor and power system. The ISL9500 IC is available in a 38 lead TSSOP. • User programmable Switching Frequency of 250kHz 1MHz • Pb-Free Plus Anneal Available (RoHS Compliant) Ordering Information PART NUMBER PART MARKING TEMP RANGE (°C) PACKAGE PKG. DWG. # 38 Ld TSSOP (Pb-free) M38.173 38 Ld TSSOP ISL9500CVZ-T ISL9500CVZ -10 to 85 Tape and Reel (See Note) (Pb-free) M38.173 ISL9500CVZ (See Note) ISL9500CVZ -10 to 85 NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark of Intersil Americas LLC. Copyright Intersil Americas LLC. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL9500 All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 quality systems. Intersil Corporation’s quality certifications can be viewed 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 FN9248.0 December 2, 2005