LP28057A – 00

Jan.-2019

www.lowpowersemi.com

Page 2 of 7

Preliminary Datasheet

LP28057A

Functional Pin Description

Package Type

Pin Configurations

ESOP-8

4

3

2

1

5

6

7

8

STAT2

VIN

NC

VSS

BAT

STAT1

EN

ISET

GND

9

Pin Description

PIN

PIN

Number

DESCRIPTION

1

NC

No Connector.

2

ISET

Charge Current Program and Charge Current Monitor Pin. The charge current is programmed

servos to 1V. In all modes, the voltage on this pin can be used to measure the charge current

3

VSS

VSS is the connection to system ground.

4

VIN

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

5

BAT

BAT is the connection to the battery.

6

STAT2

Open-Drain Charge Status Output. When the battery is charging, the STAT pin could be pulled

High by an external pull high resistor. When the charge cycle is completed, the pin is pulled

Low by an internal N-channel MOSFET.

7

STAT1

Open-Drain Charge Status Output. When the battery is charging, the STAT pin is pulled low by

an internal N-channel MOSFET. When the charge cycle is completed, the pin could be pulled

High by an external pull high resistor.

8

EN

Chip enable pin. Charging when the pin is floating or connected to a high voltage. Discharge when

the pin pull low.