®
ACT2103
Rev 2, 23-May-12
OPERATION TEMPERATURE RANGE
-40°C to 85°C
ORDERING INFORMATION
PART NUMBER
ACT2103YH-T
PACKAGE
SOP-8EP
PINS
8
PACKING
TAPE & REEL
PIN CONFIGURATION
PIN DESCRIPTIONS
PIN
1
2
3
4
NAME
HSB
IN
SW
GND
DESCRIPTION
High-Side Bias Input. This pin acts as the positive rail for the high-side switch's gate
driver. Connect a 10nF or greater capacitor between HSB and SW pins.
Input Supply. Bypass this pin to GND with a low ESR capacitor. Drive IN with a 4.5V to
18V power source. See
Input Capacitor
in the
Application Information
section.
Switch Output. Connect this pin to the switching end of the external inductor. Note that
a capacitor is required from SW to HSB to power the high-side switch.
Ground.
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.923V.
See
Setting the Output Voltage.
Compensation Node. COMP is used to compensate the regulation control loop. See
Compensation Components.
Enable Input. When higher than 2.5V, this pin turns the IC on. When lower than 2.3V,
this pin turns IC off. When left unconnected, EN is pulled up to logic HIGH with a 2µA
pull-up current. EN is a digital input that turns the regulator on or off.
Not connected.
5
6
7
8
FB
COMP
EN
N/C
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TM
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