AAT1110
Fast Transient 800mA Step-Down Converter
Adjustable Version
(0.6V device)
1
Ω
Ω
R2 = 221k
R2 = 59k
Ω
Ω
VOUT (V)
R1 (k )
R1 (k )
L1 (µH)
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
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
1000
2.2
2.2
2.2
2.2
2.2
2.2
4.7
4.7
4.7
4.7
6.8
6.8
6.8
124
137
187
267
Fixed Version
R2, R4 Not Used
VOUT (V)
R1 (kΩ)
L1 (µH)
0.6-3.3V
0
4.7
Table 3: Evaluation Board Component Values.
Inductance
(µH)
Max DC
Current (A)
DCR
(Ω)
Size (mm)
LxWxH
Manufacturer
Part Number
Type
Sumida
CDRH3D16-2R2
CDRH3D16-4R7
CDRH3D16-6R8
LPO3310-472
SD3118-4R7
2.2
4.7
6.8
4.7
4.7
6.8
4.7
1.20
0.90
0.73
0.80
0.98
0.82
1.30
0.072
0.105
0.170
0.27
3.8x3.8x1.8
3.8x3.8x1.8
3.8x3.8x1.8
3.2x3.2x1.0
3.1x3.1x1.85
3.1x3.1x1.85
5.7x4.4x1.0
Shielded
Shielded
Shielded
1mm
Sumida
Sumida
Coilcraft
Coiltronics
Coiltronics
Coiltronics
0.122
0.175
0.122
Shielded
Shielded
1mm Shielded
SD3118-6R8
SDRC10-4R7
Table 4: Typical Surface Mount Inductors.
Manufacturer
Part Number
Value
Voltage
Temp. Co.
Case
MuRata
MuRata
MuRata
GRM219R61A475KE19
GRM21BR60J106KE19
GRM21BR60J226ME39
4.7µF
10µF
22µF
10V
6.3V
6.3V
X5R
X5R
X5R
0805
0805
0805
Table 5: Surface Mount Capacitors.
1. For reduced quiescent current, R2 and R4 = 221kΩ.
18
1110.2006.04.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
