AAT2148 Datasheet, PDF (17/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 1A Step-Down Converter

DATA SHEET
AAT2148
Low-Noise, Fast Transient 1A 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)
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
Part Number
CDRH3D16/HP-2R2
CDRH5D16-4R7
CDRH5D16-6R8
LQH3NPN2R2NG0
LQH32PN2R2NN0
LQH32PN4R7NN0
SD3118-2R2-R
SD3118-4R7-R
SD3118-6R8-R
Inductance (μH)
2.2
4.7
6.8
2.2
2.2
4.7
2.2
4.7
6.8
Saturation
Current (A)
1.75
2.15
1.8
1.25
1.55
1.0
2.0
1.31
1.12
DCR ()
47
51.3
64.7
73
76
180
74
162
232
Size (mm)
LxWxH
4.0x4.0x1.8
5.8x5.8x1.8
5.8x5.8x1.8
3.0x3.0x1.4
3.2x2.7x1.55
3.2x2.7x1.55
3.1x3.1x1.8
3.1x3.1x1.8
3.1x3.1x1.8
Table 4: Typical Surface Mount Inductors.
Type
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Manufacturer
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
202009A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012
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