AAT1151 Datasheet, PDF (14/16 Pages) Advanced Analogic Technologies – 850kHz 700mA Synchronous Buck DC/DC Converter

DATA SHEET
AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
AAT1151 Dissipation
P_TOTAL
=
I_O2
•
(R_DS(ON)H
• V_O
V_IN
+
R_DS(ON)L
•
(V_IN
-V_O))
+
(t_sw
•
F_S
•
I_O
+
I_Q)
•
V_IN
(0.7A)² • (0.2Ω • 1.5V + 0.187Ω • (4.2V - 1.5V))
=
+ (20nsec • 850kHz • 0.7A + 0.3mA) • 4.2V = 0.145W
4.2V
T_J(MAX) = T_AMB + Θ_JA • P_LOSS = 85°C + 150°C/W • 0.145W = 107°C (MSOP-8)
= 85°C + 50°C/W • 0.145W = 92°C (QFN33-16)
Manufacturer
Taiyo Yuden
Toko
Sumida
Sumida
Sumida
Murata
Murata
Murata
Part Number
NPO5DB4R7M
A914BYW-3R5M-D52LC
CDRH5D28-3R0
CDRH5D28-4R2
CDRH5D18-4R1
LQH55DN4R7M03
LQH66SN4R7M03
CDRH3D16-3R3
Value
4.7μH
3.5μH
3.0μH
4.2μH
4.1μH
4.7μH
4.7μH
3.3μH
Max DC
Current
1.4A
1.34A
2.4A
2.2A
1.95A
2.7A
2.2A
1.1A
DCR (Ω)
0.038
0.073
0.024
0.031
0.057
0.041
0.025
0.063
Table 1: Surface Mount Inductors.
Size (mm)
LxWxH
5.9 x 6.1 x 2.8
5.0 x 5.0 x 2.0
5.7 x 5.7 x 3.0
5.7 x 5.7 x 3.0
5.7 x 5.7 x 2.0
5.0 x 5.0 x 4.7
6.3 x 6.3 x 4.7
3.8 x 3.8 x 1.8
Type
Shielded
Shielded
Shielded
Shielded
Shielded
Non-Shielded
Shielded
Shielded
Manufacturer
Murata
Murata
Murata
Murata
Part Number
GRM40 X5R 106K 6.3
GRM42-6 X5R 106K 6.3
GRM21BR60J226ME39L
GRM21BR60J106ME39L
Value
10μF
10μF
22μF
10μF
Voltage
6.3V
6.3V
6.3V
6.3V
Table 2: Surface Mount Capacitors.
Temp. Co.
X5R
X5R
X5R
X5R
Case
0805
1206
0805
0805
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
14
201991B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013