Features
 36V input standoff voltage
 Programmable charge current up to 1 A
 Overvoltage lockout protection
 Undervoltage lockout protection
 Reverse current protection between BAT and
GND pins
 Automatic recharge threshold 4.05 V (Typ.)
 Charge status output pin
 2.5 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 DIO54056 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 4.2 V, and the charge current
can be programmed externally with a single
resistor.
The DIO54056 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 DIO54056 automatically
enters a low current state, dropping the battery
drain current to less than 0.5 μA. The DIO54056
can be put into shutdown mode, reducing supply
current to 42 μA (Typ.).
The DIO54056 is available in DFN2*2-8 and
EP-SOIC8 packages.