ACE4056P

100mA, Single Li-ion Battery Charger

VER 1.1

1

Description

The ACE4056P 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 4.2V or 4.35V, and the charge current can

be programmed externally with a single resistor.

The ACE4056P 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 ACE4056P automatically enters a

low current state, dropping the battery drain current to less than 0.5uA.

The ACE4056P is available in a small package with SOT-23-5. Standard product is Pb-Free.

Features



Programmable Charge Current Up to 100mA



Under Voltage Lockout Protection



Automatic Recharge Threshold 4.05V(Typ.)



Charge Status Output Pin



3.0V Trickle Charge Threshold



Soft-Start Limits Inrush Current

Application



Wearable Devices



MP3/MP4 Players



U-key



Bluetooth, wireless handsets



Others portable electronic device

Absolute Maximum Ratings

Symbol

Items

Value

Unit

Input Voltage

-0.3～6

V

PROG Voltage

V

BAT Voltage

-0.3～6

V

CHGb Voltage

V

Power Dissipation

SOT23-5

0.3

W

Junction Temperature

-40~125

℃

Tstg

Storage Temperature

-55 to 150

℃

Tsolder

Package Lead Soldering Temperature

260℃, 10s

Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability.