General Descrip�on

The FC9054 is a complete constant-current/constant-voltage

linear charger for single cell lithium-ion ba�eries.Its SOT-23-5

package and low external component count make the

FC9054 ideally suited for portable applica�ons. Furthermore,

the FC9054 can work within USB and wall adapter. No

blocking diode is required due to the internal PMOSFET

architecture and have prevent to nega�ve Charge Current

Circuit. Thermal feedback regulates the charge current to

limit the die temperature during high power opera�on or

high ambient temperature. The charge voltage is fixed at

4.2V, and the charge current can be programmed externally

with a single resistor. The FC9054 automa�cally terminates

the charge cycle when the charge current drops to 1/10th

the programmed value a�er the final float voltage is

reached.

FC9054 Other features include current monitor, under voltage

lockout, automa�c recharge and charge status pin to indicate

charge termina�on.

Features



Programmable Charge Current Up to 800mA



No MOSFET, Sense Resistor or Blocking Diode Rquired



Complete Linear Charger in SOT-23-5 Package for

Single Cell Lithium-Ion Ba�eries



Constant-Current/Constant-Voltage



Charges Single Cell Li-Ion Ba�eries Directly from USB Port



Preset 4.2V Charge Voltage with 1.5% Accuracy



Automa�c Recharge



Charge Status Output Pins



C/10 Charge Termina�on



2.9V Trickle Charge Threshold



So�-Start Limits Inrush Current



Available Radiator in SOT23-5 Package, the Radiator

need connect GND or impending

Applica�ons



Cellular Telephones, PDAs, GPS



Charging Docks and Cradles



Digital S�ll Cameras, Portable Devices



USB Bus-Powered Chargers, Chargers

Package Types

Figure 1. Package Types of FC9054

0.8A Standalone Linear Li-lon Battery Charger with Thermal Regulation

SEMICONDUCTOR

TECHNICAL DATA

FC9054

2019. 05. 13

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Revision No : 0