Preliminary

Datasheet

LP4062

LP4062 –00

Ver. 1.0 Datasheet

Nov.-2007

Page 1 of 13

Thermal Regulation in ThinSOT

General Description

The LP4062 is a complete constant-current/constant-

voltage linear charger for single cell lithium-ion batteries.

Its ThinSOT package and low external component count

make the LP4062 ideally suited for portable applications.

Furthermore, the LP4062 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 LP4062

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

LP4062 - □ □ □ □

□

F: Pb-Free

Package Type

B5: SOT23-5

Applications

Portable Media Players/MP3 players

Cellular and Smart mobile phone

PDA/DSC

Bluetooth Applications

Features

Programmable Charge Current Up to 600mA

No MOSFET, Sense Resistor or Blocking Diode

Required

Complete Linear Charger in ThinSOT Package

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

Preset 4.2V Charge Voltage with ± 1% Accuracy

Available in SOT23-5 Package

Charge Current Monitor Output for Gas

Gauging

Automatic Recharge

2.9V Trickle Charge Threshold

C/10 Charge Termination

Typical Application Circuit

LP4062B5F

2

4

5

3

1

GND

VCC

PROG

BAT

CHRG

+

1uF

BATT

LED

R

3.3K

+

1uF

Vin

Marking Information

Please see website.