ACT4072

Rev2, 27-May-08

Active-Semi

Innovative Power

TM

- 2 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

ORDERING INFORMATION

PART NUMBER

TEMPERATURE RANGE

PACKAGE

PINS

PACKING

ACT4072SH

-40°C to 85°C

SOP-8

8

TUBE

ACT4072SH-T

-40°C to 85°C

SOP-8

8

TAPE & REEL

PIN CONFIGURATION

PIN DESCRIPTIONS

SOP-8

PIN

NUMBER

PIN NAME

PIN DESCRIPTION

1

BS

Bootstrap. This pin acts as the positive rail for the high-side switch’s gate driver. Con-

nect a 10nF between this pin and SW.

2

IN

Input Supply. Bypass this pin to G with a low ESR capacitor. See Input Capacitor in Ap-

plication Information

section.

3

SW

Switch Output. Connect this pin to the switching end of the inductor.

4

G

Ground.

5

FB

Feedback Input. The voltage at this pin is regulated to 1.222V. Connect to the resistor

divider between the output and ground to set output voltage.

6

COMP

Compensation Pin. See Compensation Techniques in Application Information section.

7

EN

Enable Input. Drive higher than 1.3V or leave unconnected to enable the IC. Drive lower

than 0.7V to disable the IC. When disabled, the IC is in 6µA low current shutdown mode

and the output is discharged through the Low-Side Power Switch. This pin has a small

internal pull up current to a high level voltage when pin is not connected.

8

N/C

Not Connected.

8

7

6

5

1

2

3

4

BS

IN

SW

G

FB

COMP

EN

N/C

ACT4072SH