AAT2806
Dual High Efficiency Charge Pump
for White LED and Flash Applications
Pin Descriptions
Pin #
Symbol
Function
1
2
3
C3-
C3+
Flying capacitor 3 negative terminal.
Flying capacitor 3 positive terminal. Connect a 1µF capacitor between C3+ and C3-.
Regulated output voltage for the flash LED. Requires 1µF capacitor connected between
this pin and ground.
VOUT_FL
4
5
VIN
D4
Input power supply. Requires 1µF capacitor connected between this pin and ground.
Current sink input 4.
6
D3
Current sink input 3.
7
D2
Current sink input 2.
8
D1
Current sink input 1.
9
GND
EN/SET
Ground.
10
S2Cwire serial interface control pin. It is used to enable/disable the backlight charge
pump and to control the brightness of the white LEDs.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
11
12
13
C1+
C1-
VOUT_BL
Regulated output voltage for the white LEDs. Requires 1µF capacitor connected
between this pin and ground.
14
15
16
EP
C2+
C2-
Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Flying capacitor 2 negative terminal.
EN_FLSH
Enable/disable pin for the flash charge pump.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN44-16
(Top View)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
EN_FLSH
C2-
C3-
C3+
VOUT_FL
VIN
D4
C2+
VOUT_BL
C1-
C1+
D3
D2
EN/SET
GND
D1
2
2806.2006.04.1.8
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
