AAT2120 Datasheet, PDF (17/19 Pages) Advanced Analogic Technologies – 500mA Low Noise Step-Down Converter

DATA SHEET
AAT2120
500mA Low-Noise, Step-Down Converter
Output Voltage
V_OUT (V)
0.62
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
R2 = 59kΩ
R1 (kΩ)
—
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
267
R2 = 221kΩ¹
R1 (kΩ)
—
75
113
150
187
221
261
301
332
442
464
523
715
1000
Table 3: Evaluation Board Component Values.
L1 (μH)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.2
2.7
3.0/3.3
3.0/3.3
3.0/3.3
3.9/4.2
5.6
Manufacturer
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
Taiyo Yuden
Taiyo Yuden
Taiyo Yuden
Taiyo Yuden
FDK
FDK
FDK
FDK
Part Number
CDRH2D14-1R5
CDRH2D14-2R2
CDRH2D14-2R7
CDRH2D14-3R3
CDRH2D14-3R9
CDRH2D14-4R7
CDRH2D14-5R6
CDRH2D11-1R5
CDRH2D11-2R2
CDRH2D11-3R3
CDRH2D11-4R7
NR3010
NR3010
NR3010
NR3010
MIPWT3226D-1R5
MIPWT3226D-2R2
MIPWT3226D-3R0
MIPWT3226D-4R2
Inductance
(μH)
1.5
2.2
2.7
3.3
3.9
4.7
5.6
1.5
2.2
3.3
4.7
1.5
2.2
3.3
4.7
1.5
2.2
3
4.2
Max DC
Current (mA)
1800
1500
1350
1200
1100
1000
950
900
780
600
500
1200
1100
870
750
1200
1100
1000
900
DCR
(mΩ)
50
75
85
100
110
135
150
54
78
98
135
80
95
140
190
90
100
120
140
Table 4: Suggested Inductors and Suppliers.
Size (mm)
LxWxH
3.0x3.0x1.55
3.0x3.0x1.55
3.0x3.0x1.55
3.0x3.0x1.55
3.0x3.0x1.55
3.0x3.0x1.55
3.0x3.0x1.55
3.2x3.2x1.2
3.2x3.2x1.2
3.2x3.2x1.2
3.2x3.2x1.2
3.0x3.0x1.0
3.0x3.0x1.0
3.0x3.0x1.0
3.0x3.0x1.0
3.2x2.6x0.8
3.2x2.6x0.8
3.2x2.6x0.8
3.2x2.6x0.8
Type
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Chip shielded
Chip shielded
Chip shielded
Chip shielded
Manufacturer
Murata
Murata
Part Number
GRM118R60J475KE19B
GRM188R60J106ME47D
Value (μF)
4.7
10
Voltage Rating
6.3
6.3
Table 5: Surface Mount Capacitors.
Temp. Co.
X5R
X5R
Case Size
0603
0603
1. For reduced quiescent current, R2 = 221kΩ.
2. R2 is opened, R1 is shorted.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202005A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 24, 2012
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