Pin Descriptions

Pin Configuration

TDFN33-12

(Top View)

D4

EN/SET

C1+

1

C1-

OUTCP

C2+

D3

D2

D1

GND

IN

C2-

2

3

4

5

6

12

11

10

9

8

7

Pin #

Symbol

Function

1

D4

Current sink input #4.

2

EN/SET

3

C1+

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

4

C1-

Flying capacitor 1 negative terminal.

5

OUTCP

Charge pump output to drive load circuit. Requires 1µF capacitor connected between this

pin and ground.

6

C2+

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

7

C2-

Flying capacitor 2 negative terminal.

8

IN

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

9

GND

Ground.

10

D1

Current sink input #1.

11

D2

Current sink input #2.

12

D3

Current sink input #3.

EP

Exposed paddle; connect to ground as closely as possible to package.

AAT3166

High Efficiency 1X/1.5X/2X Charge

Pump for White LED Applications

2

3166.2006.05.1.2