Pin Descriptions

Pin Configuration

TSOPJW-12

(Top view)

1

2

3

4

5

6

12

11

10

9

8

7

C2+

OUT

C1-

C1+

D3

D2

C2-

GND

IN

EN/SET

D1

D4

Pin #

Symbol

Function

1

C2+

Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+

and C2-.

2

OUT

Charge pump output. Requires 1µF capacitor connected between this pin and

ground.

3

C1-

Flying capacitor 1 negative terminal.

4

C1+

Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+

and C1-.

5

D3

Current source output #3.

6

D2

Current source output #2.

7

D4

Current source output #4.

8

D1

Current source output #1.

9

EN/SET

Control pin.

10

IN

Input power supply. Requires 1µF capacitor connected between this pin and

ground.

11

GND

Ground.

12

C2-

Flying capacitor 2 negative terminal.

AAT3131

High Efficiency 1X/1.5X Fractional

Charge Pump for White LED Applications

2

3131.2005.12.1.2