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