AAT2749 Datasheet, PDF (14/17 Pages) Skyworks Solutions Inc. – 3.0MHz Step-Down Converter and Low-V in LDO

DATA SHEET
AAT2749
3.0MHz Step-Down Converter and Low-V_IN LDO
JP2
VIN-BUCK
2.3V-5.5V
EN
C1
4.7μF
1 _{IN_LDO OUT_LDO} 2
C2
1μF
7
IN_BUCK
L1
LX ⁸
2.2μH
AAT2749
6 _CE
OUT_BUCK ³
OUT-LDO
1.2V/300mA
C4
2.2μF
OUT-BUCK
C3
4.7μF
1.8V/600mA
MODE
4 _MODE
U1 ⁵
PGND ⁹
U1
C1, C3
C2
C3
L1
AAT2749 Skyworks, 300mA LDO and 600mA Buck Converter, CSP-9
Cap, MLC, 4.7μF/10V, 0805
Cap, MLC, 1μF/10V, 0805
Cap, MLC, 2.2μF/6.3V, 0805
LQM2MPN2R2NGO, Murata, 2.2μH, ISAT = 1.2A, DCR = 0.11Ω
Figure 2: AAT2749-IUR Evaluation Board Schematic and Bill of Materials (BOM).
Figure 3: AAT2749-IUR Evaluation
Board Top Layer.
Figure 4: AAT2749-IUR Evaluation
Board Bottom Layer.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202037A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012