DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl9520 ISL9520 FN8348 Rev 1.00 Narrow VDC Regulator/Charger with SMBus Interface March 6, 2013 The ISL9520 is a highly integrated Narrow VDC system voltage Features regulator and battery charger controller. Operating parameters 0.5% system voltage accuracy (-10C to +100C) are programmable over the System Management Bus (SMBus). The ISL9520 is designed for applications where the system 3% accurate input current limit (-10C to +100C) power source is either the battery pack or the output of the 3% accurate battery charge current limit regulator/charger. This makes the max voltage to the system Variable switching frequency at light load conditions for equal to the max battery voltage instead of the max adapter higher efficiency voltage. The ISL9520 also includes a patented system to control trickle charging deeply discharged batteries while maintaining Fixed frequency operation at higher loads system voltage at a user defined minimum. High efficiency is - Fixed frequency mode can be forced by an external pin achieved with a DC/DC synchronous-rectifier buck converter, Trickle charge system for deeply discharged batteries equipped with diode emulation and variable switching frequency for enhanced light load efficiency and AC-adapter - Automatic trickle charge current (256mA) boosting prevention. The ISL9520 can charge two, three, or - Holds minimum voltage to system four series connected Lithium-ion cells, at up to 8A charge SMBus 2-wire serial interface current. Default settings for 2-, 3- or 4-cell operation at power-up are selected by an external pin. Integrated MOSFET Default system voltage values for 2-cell, 3-cell or 4-cell drivers and bootstrap diode result in fewer components and operation selected by an external pin smaller implementation area. Low offset current-sense Adapter in-rush FET control amplifiers provide high accuracy. Adapter isolation FET control The ISL9520 provides an open drain digital output that Battery short circuit protection indicates the presence of the AC-adapter. The ISL9520 also provides an analog output that indicates the battery discharge Fast system-load transient response current and an output that indicates the adapter current. Monitor outputs - Adapter and battery discharge current Applications - AC-adapter present indicator Ultrabooks 11-bit max system voltage setting Notebook computers 7-bit min system voltage setting Tablet PCs 6-bit charge current setting Portable equipment with rechargeable batteries - Over 8A battery charger current 6-bit adapter current setting Related Literature - Over 8A adapter current See AN1826, ISL9520EVAL1Z Evaluation Board Setup Procedure for evaluation board setup instructions +9V to +22V adapter voltage range V from 2.5V to 19V in 16mV increments OUT High efficiency at loads < 0.5W for Energy Star 2013 and ErP lot 6 - 250mW from adapter with 170mW to the load Turbo mode support - Pulse-by-pulse response to limit adapter current -BGATE on in Turbo mode Pb-Free (RoHS compliant) FN8348 Rev 1.00 Page 1 of 2 March 6, 2013ISL9520 Copyright Intersil Americas LLC 2013. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. 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 may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil s sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets 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 FN8348 Rev 1.00 Page 2 of 2 March 6, 2013