AAT2146 Datasheet, PDF (18/19 Pages) Advanced Analogic Technologies – Low Noise, Fast Transient 600mA Step-Down Converter

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PRODUCT DATASHEET
AAT2146
Low Noise, Fast Transient 600mA Step-Down Converter
Adjustable Version
(0.6V device)
V_OUT (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
Fixed Version
V_OUT (V)
0.6-3.3V
R2 = 59kΩ
R1 (kΩ)
R2 = 221kΩ¹
R1 (kΩ)
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
267
75.0
113
150
187
221
261
301
332
442
464
523
715
1000
R2, R4 Not Used
R1 (kΩ)
0
Table 3: Evaluation Board Component Values.
L1 (μH)
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
L1 (μH)
4.7
Manufacturer
Sumida
Murata
Coilcraft
Coiltronics
TDK
Wurth
Part Number
CDRH3D16-2R2
CDRH3D16-4R7
CDRH3D16-6R8
LQH2MCN4R7M02
LQH32CN4R7M23
LPO3310-472
SD3118-4R7
SD3118-6R8
SDRC10-4R7
VLS3015T-4R7MR99
VLS3015T-6R8MR86
744042006
Inductance (μH)
2.2
4.7
6.8
4.7
4.7
4.7
4.7
6.8
4.7
4.7
6.8
6.8
Max DC
Current (A)
1.20
0.90
0.73
0.40
0.45
0.80
0.98
0.82
1.30
0.99
0.86
1.25
DCR (Ω)
0.072
0.105
0.170
0.80
0.20
0.27
0.122
0.175
0.122
0.136
0.176
0.100
Size (mm)
LxWxH
3.8x3.8x1.8
3.8x3.8x1.8
3.8x3.8x1.8
2.0x1.6x0.95
2.5x3.2x2.0
3.2x3.2x1.0
3.1x3.1x1.85
3.1x3.1x1.85
5.7x4.4x1.0
3.0x3.0x1.5
3.0x3.0x1.5
4.8x4.8x1.8
Type
Shielded
Shielded
Shielded
Non-Shielded
Non-Shielded
1mm
Shielded
Shielded
1mm Shielded
Shielded
Shielded
Shielded
Table 4: Typical Surface Mount Inductors.
Manufacturer
Murata
Murata
Murata
Part Number
GRM219R61A475KE19
GRM21BR60J106KE19
GRM21BR60J226ME39
Value
4.7μF
10μF
22μF
Voltage
10V
6.3V
6.3V
Table 5: Surface Mount Capacitors.
Temp. Co.
X5R
X5R
X5R
Case
0805
0805
0805
1. For reduced quiescent current, R2 and R4 = 221kΩ.
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2146.2008.04.1.1