Multi-Mode Charge Pump for
White LED Backlight and Flash Applications
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
EP
AAT2801
Symbol
C3-
C3+
OUT_FLASH
IN
C1+
C1-
CP
C2+
C2-
GND
EN/SET
D3
D1
D4
D2
EN_FLSH
Function
Flying capacitor 3 negative terminal. Connect a 1µF capacitor between C3- and C3+.
Flying capacitor 3 positive terminal.
Flash output voltage. Requires 1µF capacitor connected between this pin and ground.
Input power supply. Requires 1µF capacitor connected between this pin and ground.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
White LED charge pump output. Requires 1µF capacitor connected between this pin
and ground.
Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C3-.
Flying capacitor 2 negative terminal.
Ground.
S
2
Cwire serial interface control pin for the white LED charge pump. This pin should not
be left floating.
Current source output #3.
Current source output #1.
Current source output #4.
Current source output #2.
Active high enable pin for the flash charge pump. When connected low, the charge
pump shuts down and consumes less than 1µA of current.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN44-16
(Top View)
C3-
C3+
OUT_FLASH
IN
C1+
C1-
CP
C2+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
EN_FLSH
D2
D4
D1
D3
EN/SET
GND
C2-
2
2801.2006.04.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
