PRODUCT DATASHEET
AAT3123/23A/24
ChargePumpTM High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
Pin Descriptions
AAT3123/23A
(TSOPJW-12)
1
2
3
4
5
6
7
8
9
10
11
12
Pin #
AAT3124
(QFN44-16)
10
9
7
6
5
4
1
16
15
14
12
11
2
3
8, 13
EP
AAT3124
(TSOPJW-14)
8
9
10
11
12
13
2
3
4
5
6
7
1
14
Symbol
C2+
OUT
C1-
C1+
D4
D3
D2
D1
EN/SET
IN
GND
C2-
D5
D6
N/C
Function
Flying capacitor 2 positive terminal. Connect a 1μF capacitor be-
tween C2+ and C2-.
Charge pump output. Requires 1μF capacitor connected between
this pin and ground.
Flying capacitor 1 negative terminal.
Flying capacitor 1 positive terminal. Connect a 1μF capacitor be-
tween C1+ and C1-.
Current source output #4.
Current source output #3.
Current source output #2.
Current source output #1.
Control pin using S2Cwire serial interface.
Input power supply. Requires 1μF capacitor connected between this
pin and ground.
Ground.
Flying capacitor 2 negative terminal.
Current source output #5.
Current source output #6.
No connection.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TSOPJW-12
(Top View)
QFN44-16
(Top View)
TSOPJW-14
(Top View)
C2+
OUT
C1-
C1+
D4
D3
1
12
2
11
3 AAT3123 10
4 AAT3123A 9
5
8
6
7
C2-
GND
IN
EN/SET
D1
D2
D2 1
D5 2
D6 3
D3 4
AAT3124
12 GND
11 C2-
10 C2+
9 OUT
D5 1
14 D6
D2 2
13 D3
D1 3
12 D4
EN/SET 4 AAT3124 11 C1+
IN 5
10 C1-
GND 6
9 OUT
C2- 7
8 C2+
2
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3123.2008.03.1.5