DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/isl9519 ISL9519 FN6773
Rev 3.00
March 1, 2012 Narrow VDC Regulator/Charger with SMBus Interface
The ISL9519 is a highly integrated Narrow VDC system voltage
regulator and battery charger controller. Operating parameters
are programmable over the System Management Bus (SMBus).
The ISL9519 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 ISL9519 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 ISL9519 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 …
