SC121

14

Pin Descriptions

MLPD 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.

3IN

Battery or supply input — requires an external 10μF bypass capacitor (capacitance evaluated while under

V

IN

bias) for normal operation.

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 5.0V.

6

OUT

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

OUT

bias) for normal operation.

T

Thermal

Pad

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

internally.