3

4

5

2

1

3

4

5

2

1

BAT

CHG

OUT

IN

ISET

VSS

TS

bq 25060

8

7

6

9

10

EN

LDO

BGATE

10-pin2mmx3mmSON

bq25060

SLUSA32 – MAY 2010

www.ti.com

PIN CONFIGURATION

PIN FUNCTIONS

PIN

I/O

DESCRIPTION

NAME

NO.

IN

1

I

Input power supply. IN is connected to the external DC supply (AC adapter or USB port). Bypass IN to VSS with

at least a 0.1µF ceramic capacitor.

ISET

2

I

Current programming input. Connect a resistor from ISET to VSS to program the input current limit when the user

proagammable mode is selected by the EN pin. The resistor range is between 1k

Ω and 10kΩ to set the current

between 100 mA and 1A.

VSS

3

–

Ground terminal. Connect to the thermal pad and the ground plane of the circuit.

LDO

4

O

LDO output. LDO is regulated to 4.9V and drives up to 50mA. Bypass LDO to VSS with a 0.1µF ceramic

TS

5

I

Battery pack NTC monitoring input. Connect the battery pack NTC from TS to VSS to monitor battery pack

temperature. The default pack temperature range is 0°C to 45°C thresholds.

EN

7

I

Enable input. Drive EN high to disable the IC. Connect EN to VSS to place the bq25060 in the user pgrammable

mode where the input current is programmed using the ISET input. Leave EN flaoting to place the bq25060 in

USB500 mode. See the Charger Enable section for details on using the EN interface.

CHG

8

O

Charge status indicator open-drain output. CHG is pulled low while the device is charging the battery. CHG goes

high impedance when the battery is fully charged and does not indicate subsequent recharge cycles.

BAT

6

O

Battery connection output. BAT is the sense input for the battery as well as the precharge current output. Connect

BAT to the battery and bypass BAT to VSS with a 0.1µF ceramic capacitor.

BGATE

9

I/O

Battery P-Channel FET gate drive output. Connect BGATE to the gate of the external P-Channel FET that

connects the battery to OUT. Connect BGATE to VSS if the external FET is not used. No external capacitor is

recommended from BGATE to GND.

OUT

10

O

System output connection. OUT supplies the system with a minimum voltage of 3.4V (min.) to ensure system

operation whenever an input adapter is connected regardless of the battery voltage. Bypass OUT to VSS with a

minimum 1µF ceramic capacitor.

Thermal

Pad

–

There is an internal electrical connection between the exposed thermal pad and the VSS pin of the device. The

PAD

thermal pad must be connected to the same potential as the VSS pin on the printed circuit board. Do not use the

thermal pad as the primary ground input for the device. VSS pin must be connected to ground at all times.

6

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