ACT2103

Rev 2, 23-May-12

®

- 2 -

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Copyright © 2012 Active-Semi, Inc.

ORDERING INFORMATION

PART NUMBER

OPERATION TEMPERATURE RANGE

PACKAGE

PINS

PACKING

ACT2103YH-T

-40°C to 85°C

SOP-8EP

8

TAPE & REEL

PIN CONFIGURATION

PIN DESCRIPTIONS

PIN

NAME

DESCRIPTION

1

HSB

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.

2

IN

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.

3

SW

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.

4

GND

Ground.

5

FB

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.

6

COMP

Compensation Node. COMP is used to compensate the regulation control loop. See

Compensation Components.

7

EN

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.

8

N/C

Not connected.