Features
 36 V input standoff voltage
 Programmable charge current up to 0.8 A
 Overvoltage lockout protection
 Undervoltage lockout protection
 Reverse current protection between BAT and
GND pins
 Automatic recharge threshold
DIO54056A: 4.25 V
DIO54056B: 4.2 V
DIO54056C: 4.05 V
 Final float voltage
DIO54056A: 4.4 V
DIO54056B: 4.35 V
DIO54056C: 4.2 V
 Charge status output pin
 2.6 V trickle charge threshold
 Battery temperature monitoring
 Chip enable input
 Soft-start limits inrush current
Applications
 Wireless phone
 MP3/MP4 player
 Bluetooth device
Descriptions
The DIO54056A/B/C is a complete
constant-current / 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.
The charge voltage is fixed at 4.4 V for DIO54056A
and 4.35 V for DIO54056B and 4.2 V for
DIO54056C, and the charge current can be
programmed externally with a single resistor.
The DIO54056A/B/C 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 DIO54056A/B/C
automatically enters a low current state, dropping
the battery drain current to less than 0.5 μA. The
DIO54056A/B/C can be put into shutdown mode,
reducing supply current to 42 μA (Typ.).
DIO54056A/B/C is available in DFN2*2-8 package.