LP28021-04

Apr.-2017

www.lowpowersemi.com

Page 3 of 11

Preliminary Datasheet

LP28021

Pin Description

Pin

Name

Description

LP28021

LP28021A

ESOP8 TDFN-10

TDFN-10

6,9

1,7,11

1,7,11

GND

GND is the connection to system ground.

1

2

ILIMIT

Input Current limit Program Pin. The input current from VIN to OV is

2

/EN

Chip enable pin. Active low

2

3

3

BAT

BAT is the connection to the battery.

3

4

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.

4

5

5

CHRG

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

CHRG pin is pulled low by an internal N-channel MOSFET. When the

charge cycle is completed, the pin is pulled High.

5

6

6

ISET

Charge Current Program, Charge Current Monitor and Shutdown Pin.

7

8

8

VO

Input of Charger. Connect a capacitor 10uF to ground.

9

9

OV

Output of Over Voltage Protection part. Connect a capacitor 10uF to

ground.

8

10

10

VIN

VIN is the input power source with Over Voltage Protection part. Connect

to a wall adapter.