AAT1157 AAT, AAT1157 Datasheet - Page 12

• Manufacturer Part Number: AAT1157
• Description: DC/DC Converter
• Manufacturer: AAT

AAT1157 Dissipation and Junction Temperature Estimate:
Surface Mount Inductors
Surface Mount Capacitors
12
P
T
J(MAX)
TOTAL
Manufacturer
MuRata
MuRata
MuRata
Manufacturer
Sumida
Sumida
Sumida
TaiyoYuden
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
MuRata
MuRata
=
= 341mW
=
= T
I
1.2A
O
AMB
2
· (R
2
+ Θ
· (0.17 Ω · 2.5V + 0.16Ω · (4.2V - 2.5V))
DSON(HS)
JA
· P
Part Number
CDRH5D28-2R6
CDRH5D28-3R0
CDRH5D28-4R2
NPO5DB4R7M
CDRH4D28-2R2
CDRH4D28-2R7
CDRH4D28-3R3
CDRH5D18-4R1
CDRH3D16/HP-2R2
CDRH3D16/HP-3R3
LQH55DN4R7M03
LQH66SN4R7M03
Part Number
GRM21BR60J106ME01L
GRM21BR60J226ME01L
GRM31CR60J106KA01L
TOTAL
· V
O
V
= 85°C + 50°C/W · 0.341W = 102°C
+ R
IN
4.2V
DSON(LS)
· (V
IN
-V
O
Value
(µH)
))
2.6
3.0
4.2
4.7
2.2
2.7
3.3
4.1
2.2
3.3
4.7
4.7
+ (t
sw
Current (A)
Value
· F · I
(µF)
+ (20nsec · 1MHz · 1.2A + 275µA) · 4.2V
Max DC
10
22
10
1MHz 1.2A Buck DC/DC Converter
2.04
1.57
1.95
2.6
2.4
2.2
1.4
1.6
2.3
1.8
2.7
2.2
O
+ I
Q
) · V
Voltage
(V)
6.3
6.3
6.3
IN
(mΩ Ω )
DCR
18
24
31
38
31
43
49
57
59
85
41
25
Temp. Co.
Size (mm)
5.7x5.7x3.0
5.7x5.7x3.0
5.7x5.7x3.0
5.9x6.1x2.8
5.0x5.0x3.0
5.0x5.0x3.0
5.0x5.0x3.0
5.7x5.7x2.0
4.0x4.0x1.8
4.0x4.0x1.8
5.0x5.0x4.7
6.3x6.3x4.7
L x W x H
X5R
X5R
X5R
AAT1157
Non-Shielded
1157.2005.11.1.4
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Type
Case
0805
0805
1206