High Current LED Flash Driver Charge Pump IC
Pin Descriptions
Pin #
1, 12
2
3
4
5
6
7
8
9
10
11
EP
AAT3172
Symbol
VIN
C1+
C1-
GND
F1
F2
EN/SET
N/C
C2-
C2+
VOUT
Function
Input power supply pin. Requires 4.7µF bypass capacitor to ground.
Flying capacitor C1 positive terminal. Connect a 1.0µF capacitor between C1+ and C1-.
Flying capacitor C1 negative terminal.
Ground connection.
Current sink input #1.
Current sink input #2.
AS
2
Cwire serial interface control pin.
No connection.
Flying capacitor C2 negative terminal.
Flying capacitor C2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Charge pump output. Requires 2.2µF capacitor connected between this pin and ground.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
VIN
C1+
C1-
GND
F1
F2
1
2
3
4
5
6
12
11
10
9
8
7
VIN
VOUT
C2+
C2-
N/C
EN/SET
2
3172.2006.05.1.5
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
