Rev. 1.6 March 2010

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AOZ1031AI

Ordering Information

AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.

Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.

Pin Configuration

Pin Description

Part Number

Ambient Temperature Range

Package

Environmental

AOZ1031AI

-40°C to +85°C

SO-8

RoHS Compliant

Green Product

Pin Number

Pin Name

Pin Function

1

PGND

Power ground. PGND needs to be electrically connected to AGND.

2

VIN

Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high, the

device starts up.

3

AGND

Analog ground. AGND is the reference point for controller section. AGND needs to be

electrically connected to PGND.

4

FB

Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider

between the output and AGND.

5

COMP

External loop compensation pin. Connect a RC network between COMP and AGND to

compensate the control loop.

6

EN

Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the

device. Do not leave it open.

7, 8

LX

Switching node. PWM output connection to inductor.

LX

LX

EN

COMP

1

2

3

4

PGND

VIN

AGND

FB

SO-8

(Top View)

8

7

6

5