XC3071是一款完整的单节锂电池充电器，自带OVP,VIN输入耐压30V ,BAT耐压30V，带电池防反接功能，兼容大小500-600mA充电电流，采用涓流，恒流，恒压控制，SOT23-5封装与较少的外部元件数目使得XC3071成为便携式应用的理想选择。XC3071可以适合USB电源和适配器电源工作。
XC3071采用了内部PMOSFET架构，加上防倒充电路，所以不需要外部检测电阻器和隔离二极管。热反馈可对充电电流进行自动调节，以便在大功率操作或高环境温度条件下对芯片温度加以限制。充满电压4.2V，充电电流可通过一个电阻器进行外部设置。当电池达到预设电压后，充电电流将至设定值1/10，芯片将自动终止充电。
当输入电压（交流适配器或者USB电源）被拿掉时，XC3071自动进入一个低电流状态，电流漏电流在1uA以下，XC3071的其他特点包括欠压闭锁，自动再充电盒一个用于指示充电状态的引脚。
GENERAL DESCRIPTION
The XC3072 Series is a complete constant
current & constant voltage linear charger for
single cell lithium-ion batteries. Its SOT23-5
package and low external component counts
make the XC3072 Series ideally suited for
portable applications. Furthermore, the XC3072
Series is specifically designed to work within
USB power specifications.
No external sense resistor is needed, and no
blocking diode is required due to the internal
MOSFET architecture. The charge voltage is
fixed at 4.2V/4.35V/4.4V, and the charge
current can be programmed externally with a
single resistor. The XC3072 automatically
terminates the charge cycle when the charge
current drops to 1/10 the programmed value
after the final float voltage is reached.
When the input supply (wall adapter or USB
supply) is removed, the XC3072 automatically
enters a low current state, dropping the battery
drain current to less than 2uA. The XC3072 can
be put into shutdown mode, reducing the supply
current to 50uA.
Under-voltage lockout, automatic recharge
and two status pins to indicate charge and
charge termination.
FEATURES
• Available in SOT23-5 Package
• 30V standoff input voltage at VCC pin
Programmable Charge Current Up to 600mA
• No MOSFET, Sense Resistor or Blocking
Diode Required
• Complete Linear Charger in SOT23-5
Package for single Cell Lithium-Ion Batteries
• Charges Single Cell Li-Ion Batteries Directly
from USB Port
• Preset 4.2V/4.35V/4.4V Charge Voltage with
±1% Accuracy
• Charge Current Monitor Output for Gas
Gauging
Automatic Recharge
• CC/10 Charge Termination
• 50uA Supply Current in Shutdown
• 2.9V Trickle Charge Threshold
• Soft-Start Limits Inrush Current
• ESD HBM 2KV
APPLICATIONS
Cellular Telephones, PDAs, MP3 /MP4 Players
E-cigarettes
Bluetooth
GPS Applications
