■ Features
 In the package allows the range of programmable
charge current up to 1.2A above
 No MOSFET, sense resistor or blocking diode
required
 Complete linear charger in small package for single
cell lithium-ion batteries
 Constant-current/constant-voltage operation with
thermal regulation to maximize charge rate without
risk of overheating
 Charging voltage can be adjusted by the FB
 Monitor output charge current
 Charging status indicator and full status flag
 3/10 charge current termination
 Automatic recharge
 40μA supply current in shutdown
 0.7 times the programming voltage trickle charge
threshold voltage
 Soft-Start limits inrush current
 OVP protection function , the input is higher than8.0V,
stop charging
 Output with protection against anti-irrigation
 Available in eSOP-8/PP or eMSOP-8/PP Package
 When you unplug VIN , the IC does not consume
battery power
■ General Description
The XT2059 is charging management circuit that can
be programmed through an external resistor constant
current / constant voltage charging. The device includes an
internal power transistor, does not need external current
sense resistor and blocking diode in applications. XT2059
requires minimal external components, and meet the USB
bus specification, is very suitable for portable applications
in the field.
Thermal modulation circuit can control the internal
chip temperature in a safe range when the device power
dissipation be relatively large or the ambient temperature
be higher. The output voltage can be programmed by an
external resistor. Charging current is set by an external
resistor. When the input voltage (AC adapter or USB power
supply) power is lost, XT2059 automatically enters a low
power sleep mode, then the battery current consumption is
less than 0.1μA. Built-in protection circuits against irrigation,
when the battery voltage is higher than the input voltage,
automatically turn off built-in power MOSFET. Other
features include low input voltage latch, automatic
recharge, the battery temperature monitoring, Built - in
OVP protection and charge status / charge status
indication functions.
The internal use of the patented technology is to
realize protecting reverse battery. When the battery is
reversed, stop charging, indicator
The XT2059 adopted the thermally enhanced eSOP-8.
■ Applications
 Mobile phones
 Digital Cameras
 MP4 Player
 Bluetooth applications
 Electronic Dictionary
 portable devices
 all kinds of charger
 Mobile power