AAT2500M Datasheet, PDF (20/22 Pages) Advanced Analogic Technologies – 400mA Step-Down Converter and 300mA LDO

AAT2500M
400mA Step-Down Converter and 300mA LDO
V_OUT (V)
Adjustable Version
(0.6V device)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.8
1.85
2.0
2.5
V_OUT (V)
Fixed Version
0.6-3.3V
R1 (kΩ)
R1 (kΩ)
R2 = 59kΩ
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
R1 (kΩ)
R2 Not Used
0
R2 = 221kΩ¹
75.0
113
150
187
221
261
301
332
442
464
523
715
Table 3: Evaluation Board Component Values.
L1 (µH)
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2 or 3.3
4.7
L1 (µH)
2.2
Inductance
Manufacturer Part Number
(µH)
Sumida
Sumida
MuRata
MuRata
Coilcraft
Coilcraft
Coiltronics
CDRH3D16-4R7
4.7
CDRH3D161HP-2R2
2.2
LQH32CN4R7M23
4.7
LQH32CN2R2M23
2.2
LPO3310-222
2.2
LPO3310-472
4.7
SD3118-4R7
4.7
Max DC
Current (A)
0.90
1.30
0.45
0.60
1.10
0.80
0.98
DCR
(Ω)
0.11
0.059
0.20
0.13
0.15
0.27
0.122
Size (mm)
LxWxH
3.8x3.8x1.8
4.0x4.0x1.8
2.5x3.2x2.0
2.5x3.2x2.0
3.3x3.3x1.0
3.3x3.3x1.0
3.1x3.1x1.85
Table 4: Typical Surface Mount Inductors.
Type
Shielded
Shielded
Non-Shielded
Non-Shielded
Non-Shielded
Non-Shielded
Shielded
Manufacturer
MuRata
MuRata
MuRata
MuRata
Part Number
GRM21BR61A475KA73L
GRM18BR60J475KE19D
GRM21BR60J106KE19
GRM21BR60J226ME39
Value
4.7µF
4.7µF
10µF
22µF
Voltage
10V
6.3V
6.3V
6.3V
Table 5: Surface Mount Capacitors.
Temp. Co.
X5R
X5R
X5R
X5R
Case
0805
0603
0805
0805
1. For reduced quiescent current R2 = 221kΩ.
20
2500M.2007.06.1.0