PRODUCT DATASHEET
AAT2503178
SystemPowerTM
Adjustable 3-Channel Regulator
Figure 1: AAT2503 Evaluation Board
Figure 2: AAT2503 Evaluation Board
Solder Side Layout.
Component Side Layout.
SYNC
U1
AAT2503
LX
R10
5
4
9
FB
LX
100k
L1
VOUT_BUCK
C1
8
SYNC
VIN
LX
OUTA
POK
2.2μH CDRH2D14
R1
VIN
13
18
19
10
14
3
17
15
16
20
1
C2
10μF
100
R2
100pF
R3
3
2
1
VINA
VINB
VP
C4
0.1μF
100k
R4
C3
0.01μF
3
2
1
C8
1μF
VINA
FBA
OUTA
OUTB
C9
1μF
VINB
OUTB
FBB
R5
1
2
3
EN/SET
ENB
1
2
3
7
EN
PGND
AGND
R6
59.0k
R7
59.0k
R8
59.0k
C6
2.2μF
C5
2.2μF
1
2
3
2
6
ENB
ENA
GND
GND
R12
100k
C7
10μF
ENA
GND
POK
GND
C5, C6 2.2μF, 10V, X5R, 0603 GRM188R61A225KE34
C8, C9 1μF, 6.3V, X5R, 0603 GRM185R60J105KE26
C2, C7 10μF, 6.3V, X5R, 0805 GRM219R60J106KE19
L1 Sumida CDRH2D14 or Coltronics SD3814
U1 AAT2503 QFN34-20
Figure 3: AAT2503 Evaluation Board Schematic.
w w w . a n a l o g i c t e c h . c o m
2503.2008.02.1.4
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