ISL9501 To request the full datasheet, please visit www.intersil.com/products/isl9501 Data Sheet December 22, 2008 Precision Single-Phase Buck PWM Controller FN9249.2 Features The ISL9501 Single-phase Buck PWM control IC, with integrated half bridge gate drivers, proVSELes a precision voltage regulation system for microprocessors in notebook computers. Single-phase operation proVSELes flexibility in meeting the requirements of the latest microprocessors. 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 500kHz. The ISL9501 includes a 6-bit digital-to-analog converter (DAC) that dynamically adjusts the CORE PWM output voltage. The ISL9501 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”, proVSELe excellent static and dynamic CORE voltage regulation. To improve efficiency at light loading, the ISL9501 will operate in diode emulation in Deep and Deeper Sleep modes. • Diode Emulation Functionality in Deep and Deeper Sleep Modes for Improved Light Load Efficiency • Single-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 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 VSEL changes. Output overcurrent, overvoltage and undervoltage are monitored and result in the converter latching off and PGOOD signal being held low. • Power-Good Output with Internal Blanking during VSEL and Mode Changes • User Programmable Switching Frequency of 250kHz to 500kHz • Pb-Free (RoHS Compliant) The overvoltage and undervoltage thresholds are 112% and 84% of the VSEL, Deep or Deeper Sleep setpoint, respectively. Overcurrent protection features a 32 cycle overcurrent shutdown. PGOOD, overvoltage, undervoltage and overcurrent proVSELe monitoring and protection for the microprocessor and power system. The ISL9501 IC is available in a 38 Ld TSSOP and a 40 Ld QFN. Ordering Information PART NUMBER (Note) PART MARKING TEMP RANGE (°C) PACKAGE (Pb-free) PKG. DWG # ISL9501CVZ* ISL9501 CVZ -10 to +85 38 Ld TSSOP M38.173 ISL9501CRZ* ISL95 01CRZ -10 to +85 40 Ld 6x6 QFN L40.6x6 *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is 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, 2007, 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL9501 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 FN9249.2 December 22, 2008