SC198A

5

Pin Descriptions

Pin #

Pin Name

Pin Function

1

VINA

Input power supply voltage for converter A

2

LXA

Connection point for the inductor on converter A

3

GNDA

Ground reference to converter A

4

VOUTA

Feedback control input for converter A

5

CTLA0

Voltage select control pin 0 for output A (see Table 1 — Output Voltage Options).

6

CTLA1

Voltage select control pin 1 for output A (see Table 1 — Output Voltage Options).

7

CTLA2

Voltage select control pin 2 for output A (see Table 1 — Output Voltage Options).

8

GNDR

Ground for reference supply

9

CTLB2

Voltage select control pin 2 for output B (see Table 1 — Output Voltage Options).

10

CTLB1

Voltage select control pin 1 for output B (see Table 1 — Output Voltage Options).

11

CTLB0

Voltage select control pin 0 for output B (see Table 1 — Output Voltage Options).

12

VOUTB

Feedback control input for converter B

13

GNDB

Ground reference for converter B

14

LXB

Connection point for the inductor on converter B

15

VINB

Input power supply voltage for converter B

16

ENB

Enable pin for output B

17

MODE/SYNC

Oscillator synchronization input — connect to VIN for forced PWM mode, ground for power-save

mode or connect to an external clock for frequency synchronization.

18

VINR

Reference supply input

19

NC

Not connected — Leave open

20

ENA

Enable pin for output A

T

THERMAL PAD

Thermal pad for heatsinking purposes — connect to ground plane using multiple vias — not con-

nected internally