Preliminary Datasheet

LP28009

LP28009 – 02

May.-2013

www.lowpowersemi.com

Page 2 of 12

Functional Pin Description

Package Type

Pin Conf ig urations

ESOP- 8

ACIN

CHG_S

PGOOD

GND

BATT

EN

NC

ISETA

1

2

3

5

6

7

8

PGND

9

4

Pin Description

Pin No

Pin Name

Pin Function

1

ACIN

Wall Adaptor Charge Input Supply.

2

CHG_S

Charge Status Indicator Output(Open Drain).

3

PGOOD

Power Good Indicator Output(Open drain).

4

GND

Ground.

5

ISETA

Wall Adaptor supply charge current Set point.

6

EN

Charge Enable Input(active low).

7

NC

No Internal Connection.

8

BATT

Battery Charge Current Output.

This pin provides charge current to the battery and

regulates the final float voltage to 4.2 or 8.4V. An

internal precision resistor divider from this pin sets the

float voltage which is disconnected in shutdown mode.

9

(Exposed

Pad)

PGND

Exposed Pad Should be soldered to PCB Board and

Connected to GND.

Note: LP28009-42SPF and LP28009-84SPF of Battery (Pin8) is output pin, the pin connector to Battery.