LP4074-00

Aug.-2018

www.lowpowersemi.com

Page 1 of 8

Preliminary Datasheet

LP4074

600mA Standalone Linear Li-Ion Battery Charger

General Description

The LP4074 is a complete constant-current/constant- voltage

linear charger for single cell lithium-ion batteries. Its SOT23-5

package and low external component count make the LP4074

ideally suited for portable applications. Furthermore, the

LP4074 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 LP4074 automatically terminates the charge cycle

when the charge current drops to 1.5/10th the programmed

value after the final float voltage is reached. When the input

supply (wall adapter or USB supply) is removed, the LP4074

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 and the presence of an input voltage.

Order Information

LP4074

□ □ □

F

Package Type

B5:SOT23-5

B6:SOT23-6

Applications



Portable Media Players/MP3 players



Cellular and Smart mobile phone



PDA/DSC



Bluetooth Applications

Features

Thermal Regulation to Maximize

Typical Application Circuit

ISET

STAT2

VBAT

STAT1

Battery

10uF

VIN

RSET

2K

GND

10uF

VIN

1Ω

Marking Information

Part

Marking

Package

Shipping

LP4074B5F

LP4074

YWX

SOT23-5

3K/REEL

LP4074B6F

LP4074

YWX

SOT23-6

3K/REEL

Marking indication:

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