AOZ1240

Rev. 1.3 September 2010

www.aosmd.com

Page 2 of 15

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

AOZ1240AI

-40°C to +85°C

SO-8

Green Product

VBIAS

VIN

EN

COMP

1

2

3

4

LX

BST

GND

FB

SO-8

(Top View)

8

7

6

5

Pin Number

Pin Name

Pin Function

1

LX

PWM output connection to inductor. LX pin needs to be connected externally. Thermal connection

for output stage.

2

BST

Bootstrap voltage input. High side driver supply. Connected to 0.1µF capacitor between BST and

LX.

3

GND

Ground.

4

FB

Feedback input. It is regulated to 0.8V. The FB pin is used to determine the PWM output voltage

via a resistor divider between the output and GND.

5

COMP

External loop compensation. Output of internal error amplifier. Connect a series RC network to

GND for control loop compensation.

6

EN

pin floating.

8

VBIAS

Compensation pin of internal linear regulator. Place a 1µF capacitor between this pin and ground.