DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl9519q Narrow VDC Regulator/Charger with SMBus Interface ISL9519Q Features The ISL9519Q is a highly integrated Narrow VDC system voltage regulator and battery charger controller. Operating parameters are programmable over the System Management Bus (SMBus). The ISL9519Q is designed for applications where the system power source is either the battery pack or the output of the regulator/charger. This makes the max voltage to the system equal to the max battery voltage instead of the max adapter voltage. The ISL9519Q also includes a patented system to control trickle charging deeply discharged batteries while maintaining system voltage at a user defined minimum. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation and variable switching frequency for enhanced light load efficiency and AC-adapter boosting prevention. The ISL9519Q can charge one, two or three series connected Lithium-ion cells, at up to 8A charge current. Default settings for 1-, 2- or 3-cell operation at power-up are selected by an external pin. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy. • ±0.5% System Voltage Accuracy (-10°C to +100°C) The ISL9519Q provides an open drain digital output that indicates the presence of the AC-adapter. The ISL9519Q also provides an analog output that indicates the battery charge current. • Battery Short Circuit Protection Related Literature) • ±3% Accurate Input Current Limit • ±3% Accurate Battery Charge Current Limit • Variable Switching Frequency at Light Load Conditions for Higher Efficiency • Fixed Frequency Operation at Higher Loads - Fixed Frequency Mode can be Forced by an External Pin • Trickle Charge System for Deeply Discharged Batteries - Automatic Trickle Charge Current (256mA) - Holds Minimum Voltage to System • SMBus 2-Wire Serial Interface • Default System Voltage Values for 1-Cell, 2-Cell or 3-Cell Operation Selected by an External Pin • Adapter In-rush FET Control • Adapter Isolation FET Control • Fast System-Load Transient Response • Monitor Outputs - Charge Current (2.5% Accuracy) - AC-adapter Present Indicator • See AN1562, “ISL9519EVAL1Z Evaluation Board Setup Procedure” for applications with adapter voltage > 7V • 11-Bit Max System Voltage Setting • See AN1570, “ISL9519EVAL2Z Evaluation Board Setup Procedure” for applications with adapter voltage > 5V • 6-Bit Charge Current Setting - Over 8A Battery Charger Current • See Figures 2 and 3 for the different application circuits for adapters > 7V and adapters >5V Applications • 7-Bit Min System Voltage Setting • 6-Bit Adapter Current Setting - Over 8A Adapter Current • +4.5V to +22V Adapter Voltage Range • Notebook Computers • Pb-Free (RoHS Compliant) • Netbook and Tablet PCs • Handheld Electronic Devices • Portable Equipment with Rechargeable Batteries May 26, 2011 FN7620.2 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL9519Q 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 FN7620.2 May 26, 2011