AAT2500B Datasheet, PDF (18/21 Pages) Advanced Analogic Technologies – Adjustable 3-Channel Regulator

SystemPower^TM
PRODUCT DATASHEET
AAT2500B
Adjustable 3-Channel Regulator
SYNC
R10
100k
VIN
R1
100
C4
0.1μF
3
2
1
VINA
C8
3
1μF
2
1
VINB
U1
FB 5 _FB
AAT2500B
LX
MODE/SYNC 4 _{MODE/SYNC LX}
VIN 13 _VIN
OUTA
VLDOA 18 _VLDOA
POK
VLDOB 19
C9
1μF
VP 10
VLDOB
VP
FBA
OUTB
9 LX
8
17 OUTA
15
16 FBA
20 OUTB
LX
L1
CDRH2D14
R3
100k
R4
1
2
3
EN
GND
1
2
3
ENB
1
2
3
ENA
R12
(open)
EN 14 _EN
ENB 3 _ENB
ENA 2 _ENA
C7
10μF
FBB
1
FBB
PGND
7
AGND
6
R5
R7
59.0k
R8
59.0k
GND
POK
POK
Buckout
C2
10μF
C6
2.2μF
C5
2.2μF
VOUT_BUCK
C3
.01μF
C1
R2
100pF
OUTA
OUTB
R6
59.0k
GND
GND
VOUT_BUCK (V)
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.8
1.85
2.0
2.5
2.8
3.0
3.3
R2 (kΩ)
0
6.65
13.3
19.6
26.1
32.4
39.2
59
61.9
71.5
105
124
137
158
L1 (μH)
1.5
1.5
1.5
1.5
1.5
1.5
2.2
2.2
2.2
2.2
3.3
3.3
3.3
3.3
VOUT_LDO (V)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.8
1.85
2.0
2.5
3.3
R4, R5 (kΩ)
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
267
U1 AAT2500B QFN34-20
L1 Sumida CDRH2D14 or Coltronics SD3812
C2, C7 10μF, 6.3V, X5R, 0805 GRM219R60J106KE19
C5, C6 2.2μF, 10V, X5R, 0603 GRM188R61A225KE34
C8, C9 1μF, 6.3V, X5R, 0603 GRM185R60J105KE26
Figure 3: AAT2500B Evaluation Board Schematic.
18
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2500B.2008.03.1.0