LP4061-02

Mar.-2017

www.lowpowersemi.com

Page 1 of 7

Preliminary Datasheet

LP4061

800mA Standalone Linear Li-Ion Battery Charger

with Dual LED Display

General Description

The LP4061 is a complete constant-current/constant- voltage

linear charger for single cell lithium-ion batteries. Its SOT

package and low external component count make the LP4061

ideally suited for portable applications. Furthermore, the

LP4061 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 LP4061 automatically terminates the charge cycle

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

after the final float voltage is reached. 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

LP4061 □ □ □

F: Pb-Free

Package Type

B5: SOT23-6

Applications



Portable Media Players/MP3 players



Cellular and Smart mobile phone



PDA/DSC



Bluetooth Applications

Features



Programmable Charge Current Up to 800mA



No MOSFET, Sense Resistor or Blocking Diode Required



Complete Linear Charger in SOT Package for Single Cell

Lithium-ion Batteries



Constant-Current/Constant-Voltage Operation with

Thermal Regulation to Maximize



Charge Rate Without Risk of Overheating



Charges Single Cell Li-Ion Batteries Directly from USB

Port



Charge Voltage with ±1% Accuracy



Available in SOT23-6 Package



Charge Current Monitor Output for Gas Gauging



Automatic Recharge



2.9V Trickle Charge Threshold



C/10 Charge Termination

Typical Application Circuit

Marking Information

Part

Marking

Package

Shipping

LP4061

LPS

BCYWX

SOT23-6

3K/REEL

Marking indication:

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

10uF

BATTERY

GREEN

RED

10uF

STAT1

1

STAT2

5

GND

2

PROG

6

VCC

4

BATT

3

LP4061

VIN

2.7K