LP28056S-02

May.-2013

www.lowpowersemi.com

Page 2 of 8

Preliminary Datasheet

LP28056S

Typical Application Circuit

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

Name

Description

1

NC

No Connector.

2

ISET

Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is

programmed by connecting a 1% resistor(R

mode, this pin servos to 2V. In all modes, the voltage on this pin can be used to measure the

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. Typically a 10µF Tantalum capacitor is needed for stability

when there is no battery attached. When a battery is attached, only a 0.1µF ceramic capacitor is

required.

6

STAT2

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

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

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 is pulled High.

8

EN

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

when the pin pull low.

1K

BATTERY

VIN

10uF

10uF

STAT1

7

VSS

3

STAT2

6

ISET

2

VIN

4

BAT

5

PGND

9

LP28056SSPF

EN

8