AAT1146 Datasheet, PDF (18/20 Pages) Advanced Analogic Technologies – Fast Transient 400mA Step-Down Converter

DATA SHEET
AAT1146
Fast Transient 400mA 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 = 59k
R1 (k)
R2 = 221k¹
R1 (k)
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 (k)
0
Table 3: Evaluation Board Component Values.
L1 (μH)
1.5
1.5
1.5
1.5
1.5
2.2
4.7
4.7
4.7
4.7
6.8
6.8
6.8
L1 (μH)
1.5 - 6.8
Manufacturer
Sumida
Sumida
Sumida
Murata
Murata
Coilcraft
Coiltronics
Coiltronics
Coiltronics
Part Number
CDRH3D16-2R2
CDRH3D16-4R7
CDRH3D16-6R8
LQH2MCN4R7M02
LQH32CN4R7M23
LPO3310-472
SD3118-4R7
SD3118-6R8
SDRC10-4R7
Inductance (μH)
2.2
4.7
6.8
4.7
4.7
4.7
4.7
6.8
4.7
Max DC
Current (A)
1.20
0.90
0.73
0.40
0.45
0.80
0.98
0.82
1.30
DCR ()
0.072
0.105
0.170
0.80
0.20
0.27
0.122
0.175
0.122
Table 4: Typical Surface Mount Inductors.
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
Type
Shielded
Shielded
Shielded
Non-Shielded
Non-Shielded
1mm
Shielded
Shielded
1mm Shielded
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 = 221k.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201985B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013