ISL9220, ISL9220A

2

FN6936.3

February 16, 2012

Pin Descriptions

PIN

SYMBOL

DESCRIPTION

1

STAT2

Open-drain indication pin. In conjunction with STAT1 this pin provides a unique indication for each charging state of the

cycle. This pin is capable to sink 10mA minimum current to drive an LED.

2EN

IC enable input. Drive this pin to logic LO to enable the charger. Drive this pin to logic HI to disable the charger. Do not

leave this pin floating.

3

AGND

Analog ground.

4

ISET1

Charge current programing pin. Connect a resistor between this pin and the GND pin to set the charge current.

5

ISET2

End-of-charge current programing pin. Connect a resistor between this pin and the GND pin to set the end-of-charge

current.

6

VBAT

Battery connection pin. Connect this pin to the battery. A 10µF or larger X5R ceramic capacitor is recommended for

decoupling and stability purposes.

7

ISNS

this pin.

8

CISP

Input current sense positive connection pin. Connector a sense resistor from this pin the CISN.

9

CISN

Input current sense negative connection pin. Connector a sense resistor from this pin the CISP.

10, 11

VIN

Input supply voltage. Connect a 4.7µF ceramic capacitor from VIN to PGND.

12

VHI

High-side NMOS FET gate drive supply pin. Connect the anode of a Schottky diode to VBIAS pin and the cathode to VHI

pin. Connect a 0.1µF capacitor from VHI pin to SW pin. See “Typical Application Diagrams” on page 6.

13, 14

SW

Switch node and inductor connection pin.

15, 16

PGND

Power ground.

17

VBIAS

Internal 5V regulator output. Connect a 0.1µF ~ 4.7µF ceramic capacitor from this pin to AGND. A typical 1µF ceramic

capacitor is recommended.

18

RTH

Input for an external NTC thermistor for battery temperature monitoring.

19

TIME

The TIME pin sets the oscillation period by connecting a timing capacitor between this pin and GND. The oscillator also

provides a time reference for the charger. The timer function can be disabled by connecting the TIME pin to GND. If the

timer is disabled, there will be no timeout function for any operation mode including trickle charge and fast charge

modes.

20

STAT1

Open-drain indication pin. In conjunction with STAT2 this pin provides a unique indication for each charging state of the

cycle. This pin is capable to sink 10mA minimum current to drive an LED.

EPAD

Exposed pad. Connect to GND electrically. Thermally, connect as much as possible copper to this pad either on the

component layer or other layers through thermal vias to enhance the thermal performance.

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART MARKING

NUMBER

OF CELLS

TEMP. RANGE

(°C)

PACKAGE

Tape & Reel

(Pb-free)

PKG.

DWG. #

ISL9220IRTZ-T

92 20IRTZ

1

-40 to +85

20 Ld 4x4 TQFN

L20.4x4E

ISL9220IRTZ-T7A

92 20IRTZ

1

-40 to +85

20 Ld 4x4 TQFN

L20.4x4E

ISL9220AIRTZ-T

922 0AIRTZ

2

-40 to +85

20 Ld 4x4 TQFN

L20.4x4E

ISL9220AIRTZ-T7A

922 0AIRTZ

2

-40 to +85

20 Ld 4x4 TQFN

L20.4x4E

ISL9220IRTZEVAL1Z

Evaluation Board

ISL9220AIRTZEVAL1Z

Evaluation Board

NOTES:

1. Please refer to TB347 for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-

free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

3. For Moisture Sensitivity Level (MSL), please see device information page for ISL9220, ISL9220A.For more information on MSL please see techbrief

TB363.