LP4059-00

Jan.-2018

www.lowpowersemi.com

Page 1 of 9

Preliminary Datasheet

LP4059

Low standby power consumption

800mA Linear Li-Ion Battery Charger

General Description

The LP4059 is a complete constant-current/constant- voltage

linear charger for single cell lithium-ion batteries. Its

make the LP4059 ideally suited for portable applications.

Furthermore, the LP4059 is specifically designed to work within

USB power specifications. 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 4.2V, and

the charge current can be programmed externally with a single

resistor. The LP4059 automatically terminates the charge cycle

when the charge current drops to 1/10th the programmed value

after the final float voltage is reached. The input current will be

less than 1µA at this time. When the input supply (wall adapter

or USB supply) is removed, the LP4059 automatically enters a

low current state, dropping the battery drain current to less than

1µA. Other features include charge current monitor, automatic

recharge and a status pin to indicate charge termination.

Order Information

LP4059

F: Pb-Free

Package Type

B6: SOT23-6

QV: TDFN-6

BAT Voltage

Default: 4.2V

Features



Programmable Charge Current Up to 800mA



Shutdown Current less than 1μA



No MOSFET, Sense Resistor or Blocking Diode Required



Protection of Reverse Connection of Battery



Constant-Current/Constant-Voltage Operation with

Thermal Regulation to Maximize Charge Rate Without

Risk of Overheating



4.2V Charge Voltage with ± 1% Accuracy



Automatic Recharge



2.9V Trickle Charge Threshold



3/10C Charge Termination

Applications



Portable Media Players/MP3 players



Cellular and Smart mobile phone



PDA/DSC



Bluetooth Applications

Marking Information

Part

Marking

Package

Shipping

LP4059QVF

LP4059

YWX

TDFN-6

4K/REEL

LP4059B6F

SOT23-6

3K/REEL

Marking indication:

Y:Production year W:Production week X:Production batch.