AAT2138 Datasheet, PDF (16/18 Pages) Skyworks Solutions Inc. – High Current Step-Down Converter with High-Precision Programmable Current Limited Load Switch

DATA SHEET
AAT2138
High Current Step-Down Converter
with High-Precision Programmable Current Limited Load Switch
(a) Top Layer
(b) Bottom Layer
Figure 4. AAT2138 Evaluation Board Layout
Manufacturer
Samsung
Murata
Part Number
Inductance
(μH)
Max DC
Current
(A)
DCR (mΩ)
CIG22H1R0MNE
1
LQH44PN1R0NPO
1
3.3
83
2.95
30
Table 3: Recommended Inductor Selection
Size (mm)
LxWxH
2x2.5x1.2
4x4x1.65
Type
Shielded
Shielded
Manufacturer
Murata
KEMET
Part Number
Value
(μF)
Voltage
(V)
Temperature
Range
GRM188R71H104KA93D
0.1
50
GRM21BR71E105KA99L
1
25
GRM21BR61C106KE15L
10
16
GRM21BR60J226ME39
22
6.3
GRM0335C1H220GD01D
22pF
50
T495D687M006ZTE150
680
6.3
X7R
X7R
X5R
X5R
COJ
X5R
Table 4: Recommended Capacitor Selection.
Case Size
0603
0805
0805
0805
0603
7343
Component
U1
C1
C21
C23
C31
C4
C22
R1
R2
RSET
L
Part Number
Description
AAT2138IWO-0.6
GRM21BR71E105KA99L
GRM21BR61C106KE15L
GRM21BR71E105KA99L
GRM21BR60J226ME39
GRM0335C1H220GD01D
T495D687M006ZTE150
RC0603FR-07274KL
RC0603FR-0759KL
RC0603FR-076K34L
CIG22H1R0MNE
High Current Step-Down Converter with Adjustable Current
Limit Load Switch
Cap Ceramic 1uF 0805 X7R 25V 10%
Cap Ceramic 10uF 0805 X5R 16V 10%
Cap Ceramic 0.1uF 0603 X7R 50V 10%
Cap Ceramic 22uF 0805 X5R 6.3V 10%
Cap Ceramic 22pF 0603 C0J 50V 10%
Cap 680uF 7343 X5R 6.3V 20%
Res 274KΩ 1/10W 1% 0603 SMD
Res 59KΩ 1/10W 1% 0603 SMD
Res 6.34KΩ 1/10W 1% 0603 SMD
Power Inductor 1uH 3.3A 83mΩ SMD
Table 5: Evaluation Board BOM List
Manufacturer
Skyworks
Murata
KEMET
Yageo
Samsung
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
16
202006C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013