PRELIMINARY

SC120

11

Pin Descriptions

Pin #

Pin Name

Pin Function

1

LX

Switching node — connect an inductor from the input supply to this pin.

2

GND

Signal and power ground.

3

IN

Battery input and damping switch connection.

4

EN

Enable digital control input — active high.

5FB

Feedback input — connect to GND for preset 3.3V output. A voltage divider is connected from OUT to GND to

adjust output from 1.8V to 4.0V.

6

OUT

Output voltage supply pin — requires an external 10μF bypass capacitor (while under V

OUT

bias) for normal

operation.

T

Thermal

Pad

Thermal Pad is for heat sinking purposes — connect to ground using multiple vias — not connected internally.