DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
General Description
Features
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The AAT3696 BatteryManager™ is a single-cell lithium-
ion (Li-Ion)/Li-Polymer battery charger IC designed to
operate from USB ports or AC adapter up to an input
voltage of 6.5V or 6.05V (depending on the option1). For
increased safety, the AAT3696 also includes over-voltage
input protection (OVP) up to 28V.
USB or AC Adapter System Power Charger
3.0V ~ 6.5V or 6.05V Input Voltage Range
2.8V Typical Under-Voltage Lockout Threshold
Fast Over-Voltage Protection Turn Off
Two OVP Turn-On Delay Time Options:
40μs
80ms
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The AAT3696 precisely regulates battery voltage after it
has reached 4.2V or 4.375V (depending on the option1)
Li-Ion/Polymer battery cells through an extremely low
RDS(ON) switch. The charging current can be set by an
external resistor up to 1.6A. In case an over-voltage
condition occurs from the input, a series switch quickly
opens and a fault flag is activated to prevent damage to
the battery and charging circuitry.
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Two OVP Trip Point Options:
Protection Trip at 6.75V
Protection Trip at 6.25V
High Level of Integration with Internal:
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Power Device
Reverse Current Blocking
Current Sensing
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4.9V/30mA LDO Output Through Over-Voltage
Protection Device
Other fault conditions are monitored in real time. In case
of an over-current, battery over-voltage, short circuit, or
over-temperature failure, the device will automatically
shut down, thus protecting the charging device, control
system, and the battery under charge. A status monitor-
ing output pin (STAT) is provided to indicate charging
activity. This open-drain output pin can be used to drive
an external LED as a charging indicator. The AAT3696
has two charge termination mode selections when the
battery voltage has reached the constant voltage level
VCO(REG) and the charging current has decreased the ter-
mination current level.
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Programmable Current from 100mA to 1.6A Max
Charge Status Indicator
Automatic Recharge Sequencing
Automatic Trickle Charge For Battery Pre-Conditioning
Emergency Thermal Shutdown Protection
Power on Reset and Soft Start
Active Low Enable with Internal 200kΩ Pull-Down
Resistor
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Two Charge Termination Control Selections:
Manual: Continuous Battery Charging Until Charge
Termination by Enable Pin
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Automatic: Battery Charging is Terminated with
Transition to Sleep State
12-pin 3x3mm TDFN Package
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The AAT3696 offers a 4.9V/30mA LDO linear regulator.
This regulator is enabled all the time regardless of the
status of the charger and protected by the OVP switch.
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The AAT3696 is available in the Pb-free, thermally
enhanced, space-saving 3x3mm TDFN33-12 package and
is rated over the -40°C to +85°C temperature range.
Applications
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Bluetooth™ Headsets, Headphones, Accessories
Digital Still Cameras
Mobile Telephones
MP3 Players
Personal Data Assistants (PDAs)
1. Please refer to Table 9 on page 19 for complete list of options.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
1
201897B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
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