AAT3166
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Pin Descriptions
Pin #
Symbol
Function
1
2
3
4
5
D4
EN/SET
C1+
Current sink input #4.
AS2Cwire serial interface control pin.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
C1-
OUTCP
Charge pump output to drive load circuit. Requires 1µF capacitor connected between this
pin and ground.
6
7
C2+
C2-
IN
Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Flying capacitor 2 negative terminal.
8
Input power supply. Requires 1µF capacitor connected between this pin and ground.
Ground.
9
GND
D1
10
11
12
EP
Current sink input #1.
D2
Current sink input #2.
D3
Current sink input #3.
Exposed paddle; connect to ground as closely as possible to package.
Pin Configuration
TDFN33-12
(Top View)
1
2
3
4
5
6
12
11
10
9
D4
EN/SET
C1+
D3
D2
D1
C1-
GND
IN
8
OUTCP
C2+
7
C2-
2
3166.2006.05.1.2