LP28056S-02

May.-2013

www.lowpowersemi.com

Page 1 of 8

Preliminary Datasheet

LP28056S

1.2A Single-chip Li-ion and Li-POL Charge

General Description

The LP28056S is a complete constant-current /

constant-voltage linear charger for single cell

lithium-ion batteries. Its ESOP-8 package and low

external component count make the LP28056S ideally

suited for portable applications. 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 ISET rammed

externally with a single resistor. The LP28056S

automatically terminates the charge cycle when the

after the final float voltage is reached. When the input

supply is removed, the LP28056S automatically enters

a low current state, dropping the battery drain current

to less than 1µA. The LP28056S can be put into

shutdown mode, reducing the supply current to 1µA.

Other features include charge current monitor, under

voltage lockout, automatic recharge and a status pin to

indicate charge termination and the presence of an

input voltage.

Order Information

LP28056S □ □ □

F: Pb-Free

Package Type

SP: ESOP-8

Features



Programmable Charge Current Up to 1200mA



No MOSFET, Sense Resistor or Blocking Diode

Required



Constant-Current/Constant-Voltage Operation

with Thermal Regulation to Maximize Charge

Rate Without Risk of Overheating



4.2V Charge Voltage with ± 1% Accuracy



1µA Supply Current in Shutdown



Short-circuit protection



Consumption Available in ESOP-8 Package



RoHS Compliant and 100% Lead (Pb)-Free

Applications



Portable Media Players/MP3 players



Cellular and Smart mobile phone



PDA/DSC



Bluetooth Applications

Marking Information

Device

Marking

Package

Shipping

LP28056SSPF LPS

LP28056S

YWX

ESOP-8

2.5K/REEL

Marking indication:

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