500mA High Efficiency Charge Pump
for White LED Flash Applications
Pin Descriptions
Pin #
1, 4, 8, 12
2
3
5
6
7
9
10
11
12
14
15
16
EP
AAT3112
Symbol
N/C
C2+
C2-
VIN
GND
EN2
EN1
GND
VIN
VOUT1
C1+
C1-
VOUT2
Function
No connect.
Flying capacitor 2 positive terminal. Connect 1μF capacitor between C2+ and C2-.
Flying capacitor 2 negative terminal.
Input voltage. Connect to Pin 11.
Ground connection.
Enable pin. When connected high, Charge Pump 2 is enabled. When connected low, it
disables the charge pump.
Enable pin. When connected high, Charge Pump 1 is enabled. When connected low, it
disables the charge pump.
Ground connection.
Input voltage. Connect to Pin 5.
Output pin for regulated output voltage. Bypass this pin to ground with a low ESR 10μF
capacitor.
Flying capacitor 1 positive terminal. Connect 1μF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
Regulated output voltage 2. Must be connected to V
OUT1
for higher current applications.
If used separately, bypass this pin to ground with a low ESR 10μF capacitor.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
QFN33-16
(Top View)
N/C
C1+
C1-
VOUT2
16
15
14
13
N/C
C2+
C2-
N/C
1
2
3
4
5
6
7
8
12
11
10
9
VOUT1
VIN
GND
EN1
N/C
EN2
GND
VIN
2
3112.2007.01.1.5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
