Single Input, 1.6A Linear Charger with 28V Input Protection and 50mA LDO

Manufacturer's part number :


Manufacturer Skyworks


Description :

The AAT3698-2 BatteryManager™ is a single-cell Li-Ion/Li-Polymer battery charger IC designed to operate from a USB port or AC adapter with an input voltage of up to 7.0V. For increased safety, the AAT3698-2 also includes over-voltage input protection (OVP) up to 28V. The AAT3698-2 precisely regulates battery voltage for 4.2V Li-Ion/Polymer battery cells through a low RDS(ON) switch. The charging current can be set by an external resistor up to 1.6A. If an over-voltage condition occurs from the input, the series switch quickly opens and a fault flag is activated, preventing damage to the battery and the charging circuitry. Other fault conditions are monitored in real time. In case of a battery over-voltage, or over-temperature failure, the device will automatically shut down, thus protecting the charging device and battery under charge. A status monitoring 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 AAT3698-2 also includes a 5.0V LDO linear regulator with over-voltage protection that can supply loads of up to 50mA. The AAT3698-2 is available in the Pb-free, thermally enhanced, space-saving 3x3mm TDFN33-14 package and is rated over the -40°C to +85°C temperature range.

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    • USB or AC Adapter System Power Charger
    • 3.0V ~ 7.0V Input Voltage Range
    • Fast Over-Voltage Protection Turn Off
    • OVP Trip Threshold: 7.25V (typ)
    • High Level of Integration with Internal: Power Device, Reverse Current Blocking, Current Sensing
    • 5V/50mA LDO Output
    • Programmable Fast Charge Current from 50mA to 1.6A
    • Programmable Charge Termination Current
    • Charge Status Indicator
    • Power OK Indicator
    • Battery Absence Detection Input Pin
    • Automatic Termination and Recharge Sequencing (AAT3698-1 Only)
    • Automatic Trickle Charge For Battery Pre-Conditioning
    • Emergency Thermal Shutdown Protection
    • Digitally Controlled Thermal Loop Regulation
    • Active Low Enable with Internal 200kΩ Pull-Down Resistor
    • Output for Auto-Booting
    • 14-pin 3x3mm TDFN Package

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Features Similar products
Battery Technology Li-Ion, Li-Polymer  

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Linear Mode Yes  
Number of Cells 1  
Int/Ext FET Int  
Vcc Range (V) 3 to 7  
Voltage Regulation Accuracy (%) 1  
Temperature Monitor Yes  
Charge Safety Timers Yes  
Max Thermal Regulation Yes  
Operating Temperature (°C) -40 to +85  
Package TDFN33-14  
Cell Voltage (V) 4.2  
Max. Charging Current (mA) 1580