PRODUCT DATASHEET
AAT2846
ChargePumpTM High Current Charge Pump with Dual LDO for Backlight and Flash Applications
Evaluation Board Schematics
VOUT
DC+
D1
D2
D3
D4
D5
D6
D7
D8
VIN
J1
C12
1
2
3
280K yields
300mA/chnl
max flash
100µF
optional 100µF
lab supply bypass
R10
280K
U1
ENLA
ENFL
1
2
3
4
5
6
7
21
20
19
18
17
16
15
D3
F2
ENBL
ENLB
D2
ENS
PGND
IN
D1
AGND
CT
C4
4.7µF
C2-
C2
1.0µF
CREF
FBB
C2+
ENB
C8
0.1µF
_
CTRL CT
C9
0.1µF
8
9
10 11 12 13 14
VOUT
C3
C6
R11
160K
OUTB
2.2µF
C5
2.2µF
C1
1.0µF
2.2µF
Programmed for 2.8V
output by default
R12
120K
OUTA
C7
2.2µF
R13
60.4K
Programmed for 1.8V
output by default
R14
120K
Figure 8: AAT2846 Section Schematic.
w w w . a n a l o g i c t e c h . c o m
2846.2008.03.1.1
19
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
