Features
 Broad Programmable Charging Current:
10~300mA
 Maximum Voltage Power Input: 30V
 Programmable Charge Termination Current
 Automatic Recharge Threshold:
DIO50581A: 4.25V
DIO50581B: 4.215V
DIO50581D: 4.05V
 Final Float Voltage:
DIO50581A: 4.4V
DIO50581B: 4.365V
DIO50581D: 4.2V
 Trickle Charge Threshold: 2.5V
 Charge Status Output Pin
 Soft-Start Limits Inrush Current
 Over Voltage Lockout Protection
 Over-Temperature Protection
 Under Voltage Lockout Protection
 Reverse current protection between BAT and
GND pins
 Package: DFN2*2-10, DFN3*3-10
Descriptions
The DIO50581A/B/D is a complete constantcurrent
/ constant voltage linear charger for single
cell Lithium-Ion batteries. No external sense
resistor is needed, and no blocking diode is
required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to
limit the die temperature during high power
operation or high ambient temperature. The
charge voltage is fixed at 4.4V for DIO50581A,
4.365V for DIO50581B and 4.2V for DIO50581D, the
charge current and the terminal current can be
programmed externally with resistors. The input
voltage is up to 30V.
When the input supply (wall adapter or USB
supply) is removed, the DIO50581A/B/D
automatically enters a low current state, dropping
the battery drain current to less than 1.0μA.
The DIO50581A/B/D is available in packages with
DFN2*2-10 and DFN3*3-10.
Applications
 Wireless phone
 MP3/MP4 Player
 Bluetooth device