AAT3151B

High Efficiency 1X/1.5X Charge Pump

For White LED Applications

2

3151B.2007.09.1.0

Pin Descriptions

Pin Configuration

TDFN33-12

(Top View)

D4

EN/SET

C1+

1

C1-

VOUT

C2+

D3

D2

D1

GND

VIN

C2-

2

3

4

5

6

12

11

10

9

8

7

Pin #

Symbol

Function

1

D4

Current sink input #4.

2

EN/SET

AS

3

C1+

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

4

C1-

Flying capacitor 1 negative terminal.

5

VOUT

Charge pump output to drive load circuit. Requires a 1µF or larger ceramic capacitor con-

nected between this pin and ground.

6

C2+

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

7

C2-

Flying capacitor 2 negative terminal.

8

VIN

Input power supply. Requires a 1µF or larger ceramic 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 (bottom). Connect to GND directly beneath package.