SC493

10

Pin Descriptions

Pin #

Pin Name

Pin Function

1

VOUT

Output voltage

2

FB

Feedback pin

3

AVDD

Chip supply voltage

4

SDA

5

SCL

6

EN

Enable pin

7

VIN

Power stage input voltage

8

DH

High side gate driver pin

9

BST

Bootstrap pin — a capacitor is connected from BST to LX to develop the bias voltage for the high side gate

drive.

10

LX

Switching (phase) node — connect to the switching side of the power inductor.

11

NC

No Connect

12

DL

Low side gate driver pin

13

PGND

Power ground

14

PVDD

Supply voltage for driver

15

PGOOD

Power good

16

ILIM

Current limit sense point — to program the current limit connect a resistor from ILIM to LX

17

A2

18

A1

19

A0

20

AGND

Analog ground

PAD

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

internally.