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ACT4012
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
PACKAGE
PINS
PACKING
ACT4012SH
-40°C to 85°C
SOP-8
8
TUBE
ACT4012SH-T
-40°C to 85°C
SOP-8
8
TAPE & REEL
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
PIN NAME
PIN DESCRIPTION
1
BS
Bootstrap. This pin acts as the positive rail for the high-side switch’s gate driver.
Connect 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
Application Information section.
3
SW
Switch Output. Connect this pin to the switching end of the inductor.
4
G
Ground and Heatsink. Connect to a large, uncovered PCB copper area for best heat
dissipation.
5
FB
Feedback Input. The voltage at this pin is regulated to 1.293V. Connect to the resistor
divider between output and ground to set output voltage.
6
COMP
Compensation Pin. See Compensation Technique in Application Information section.
7
EN
Enable Input. When higher than 1.3V, this pin turns the IC on. When lower than 0.7V,
this pin turns 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 to exceed 6V.
8
N/C
Not Connected.
Active-Semi, Inc.
- 2 -
www.active-semi.com
1
BS
SOP-8
2
IN
3
SW
4
G
8
7
6
5
N/C
EN
COMP
FB
ACT4012SH
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