LP28021-04

Apr.-2017

www.lowpowersemi.com

Page 1 of 11

Preliminary Datasheet

LP28021

1.0A Single-chip Li-ion and Li-POL Charger

with OVP Protection

General Description

The LP28021/A is a complete constant-current/ constant

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

TDFN-10 package and low external component count make the

LP28021/A 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/4.35V, and the charge current can be

automatically terminates the charge cycle when the charge

float voltage is reached. When the input supply is removed, the

LP28021/A automatically enters a low current state, dropping

the battery drain current to less than 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

LP28021 □ □□ □ □□

BAT Voltage

Default: 4.2V

43: 4.35V

F: Pb-Free

Package Type

QV: TDFN-10

SP: ESOP8

Function Class

Default：OCP Adjustable

A：Enable

Features



Very Low Power Dissipation



Input Voltage: 3.8V~36V



Input OVP: 6.1V



Protection of Reverse Connection of Battery



Programmable Charge Current Up to 1000mA



No MOSFET, Sense Resistor or Blocking Diode Required



Constant-Current/Constant-Voltage Operation with

Thermal Regulation to Maximize Charge Rate Without

Risk of Overheating



1µA Leakage 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

Applications



Portable Media Players/Game



Power Bank



PDA/MID



Bluetooth Applications

Marking Information

Device

Marking

Package

Shipping

LP28021

LPS

LP28021

YWX

QV:TDFN-10

SP:ESOP8

3K/REEL

2.5K/REEL

LP28021A

LPS

LP28021A

YWX

QV:TDFN-10

3K/REEL

Marking indication:

Y:Production year W:Production week X: Series Number