®
ACT4065A
Rev 0, 23-Apr-12
TEMPERATURE RANGE
-40°C to 85°C
ORDERING INFORMATION
PART NUMBER
ACT4065ASH-T
PACKAGE
SOP-8
PINS
8
PACKING
TAPE & REEL
PIN CONFIGURATION
SOP-8
PIN DESCRIPTION
PIN NUMBER PIN NAME
1
2
3
4
5
6
7
8
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
Application 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 0.808V. Connect to the resistor
divider between output and ground to set output voltage.
Compensation Pin. See
Compensation Techniques
in
Application Information
section.
Enable Input. When higher than 0.8V, this pin turns the IC on. When lower than 0.8V,
this pin turn the IC off. Output voltage is discharged when the IC is off. This pin has a
small internal pull-up current to a high level voltage when pin is not connected. Do not
allow EN pin to exceed 6V.
Not Connected.
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TM
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