LP28021S-00

Jan.-2019

www.lowpowersemi.com

Page 2 of 7

Preliminary Datasheet

LP28021S

Functional Pin Description

Package Type

Pin Configurations

TDFN-10

GND

BAT

CHRG

STDBY

ISET

GND

NC

NC

VIN

1

2

3

4

5

6

7

8

9

10

NC

GND

11

TDFN-10

Pin Description

No.

NAME

DESCRIPTION

1/7

GND

GND is the connection to system ground.

2/8/9

NC

3

BAT

BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is needed

for stability when there is no battery attached. When a battery is attached, only a 1uF

ceramic capacitor is required.

4

STDBY

Open-Drain Charge Status Output. When the battery is charging, this STDBY pin is

pulled High by an internal N-channel MOSFET. When the charge cycle is completed,

the pin is pulled Low.

5

CHRG

Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is

pulled low by an internal NMOS. When the charge cycle is completed, the pin could

be pulled High by an external pull high resistor.

6

ISET

Charge Current Program. The charge current is programmed by connecting a 1%

10

VIN

VIN is the input power source. Connect to a wall adapter.