AAT3112 Datasheet, PDF (2/16 Pages) Advanced Analogic Technologies – 500mA High Efficiency Charge Pump for White LED Flash Applications

AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Pin Descriptions
Pin #
1, 4, 8, 12
2
3
5
6
7
Symbol
N/C
C2+
C2-
VIN
GND
EN2
9
EN1
10
GND
11
VIN
12
VOUT1
14
C1+
15
C1-
16
VOUT2
EP
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 ¹
C2+ ²
C2- ³
N/C ⁴
12 _VOUT1
11 VIN
10 _GND
9 _EN1
2
3112.2007.01.1.5