Active-Semi
ORDERING INFORMATION
PART NUMBER
ACT4072SH
ACT4072SH-T
ACT4072
Rev2, 27-May-08
TEMPERATURE RANGE
-40°C to 85°C
-40°C to 85°C
PACKAGE
SOP-8
SOP-8
PINS
8
8
PACKING
TUBE
TAPE & REEL
PIN CONFIGURATION
BS
IN
SW
G
1
2
8
7
N/C
EN
COMP
FB
ACT4072SH
3
4
6
5
SOP-8
PIN DESCRIPTIONS
PIN
NUMBER
1
2
3
4
5
6
7
8
PIN NAME
BS
IN
SW
G
FB
COMP
EN
N/C
PIN DESCRIPTION
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.
Input Supply. Bypass this pin to G with a low ESR capacitor. See
Input Capacitor
in
Ap-
plication Information
section.
Switch Output. Connect this pin to the switching end of the inductor.
Ground.
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.
Compensation Pin. See
Compensation Techniques
in
Application Information
section.
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.
Not Connected.
Innovative Power
TM
-2-
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Copyright © 2008 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
