AIC2802

5

SOP-8 Pin No.

Pin Name

Pin Function

1

BS

High Side Gate Drive Boost Input. BS supplies the drive for the high-side N-

Channel MOSFET switch. Connect a 10nF or greater capaitor from SW to BS

to power the high-side switch.

2

IN

Power Input. IN supplies the power to the IC, as well as the step-down con-

verter switches. Drive IN with a 4.5 to 23V power source. By pass IN to GND

with a suitably large capacitor to eliminate noise on the input to the IC.

3

SW

Power Switching Output. SW is the switching node that supplies power to the

output. Connect the output LC filter from switch to the output load. Note that a

capacitor is required from SW to BS to power the high-side switch.

4

EN

Enable Input. EN is a digital input that turns the regulator on or off. Drive EN

high to turn on the regulator. Drive it low to turn it off. For automatic strat-up,

attach to IN with a 100k

 pull up resistor.

5

FB

Feedback Input. FB senses the output voltage to regulate that voltage. Drive

feedback with a resistive voltage divider from the output voltage.

6

COMP

Compensation Node. COMP is used to compensate the regulation control loop.

Connect a series RC network form COMP to GND to compensate the regula-

tion control loop. In some cases, an additional capacitor from COMP to GND is

required.

7

FB2

Feedback Input2. FB2 senses the output voltage 2 to regulate that voltage.

Drive feedback with a resistive voltage divider from the output voltage.

8

VCPU

To Driver the Mosfet for extra output voltage 2.

9

GND

Ground. Connect the exposed pad on backside.