Preliminary Datasheet

LP28012

LP28012 – 00

Feb.-2014

Email: marketing@lowpowersemi.com

www.lowpowersemi.com

Page 1 of 10

General Description

The LP28012 is a complete constant-current/ constant

voltage linear charger for single cell lithium-ion

batteries. Its ESOP8 package and low external

component count make the LP28012 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 LP28012

automatically terminates the charge cycle when the

charge current drops to 1/10th the ISET rammed value

after the final float voltage is reached.

When the input supply is removed, the LP28012

automatically enters a low current state, dropping the

battery drain current to less than 4µA.

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

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

LP28012

□ □

□

F: Pb-Free

Package Type

QV: TDFN-10

Applications



Portable Media Players/Game



Power Bank



PDA/MID



Bluetooth Applications

Features



Very Low Power Dissipation



Short-circuit protection



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



8µA Supply Current in Shutdown



Drainage Charge Current Thermal Regulation

Status Outputs for LED or System Interface



Indicates Charge and Fault Conditions



Consumption Available in TDFN-10 Package



RoHS Compliant and 100% Lead (Pb)-Free

Typical Application Circuit

Marking Information

Device

Marking Package

Shipping

LP28012

LPS

LP28012

XXXX

QV:TDFN-10 3K/REEL

2K

BATTERY

VIN

10uF

1uF

Rset

LP28012

STAT1

2

GND

5

STAT2

3

VIN

1

BATT

10

EN

8

ISET

6