AAT2550_08 ANALOGICTECH [Advanced Analogic Technologies], AAT2550_08 Datasheet - Page 32

• Manufacturer Part Number: AAT2550_08
• Description: Total Power Solution for Portable Applications
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

2.5V Output Capacitor
C
I
1.8V Output Capacitor
C
I
Input Capacitor
Input Ripple V
C
I
P = esr · I
P
P
32
32
SystemPower
SystemPower
RMS(MAX)
RMS(MAX)
RMS(MAX)
OUT
esr
OUT
esr
IN
=
= esr · I
= esr · I
=
=
⎛
⎝
V
V
I
=
=
O1
=
3 · ΔI
3 · ΔI
DROOP
DROOP
V
2
2
RMS
I
+ I
O1
PP
·
·
RMS
RMS
1
1
O2
2
LOAD
LOAD
+ I
2
3
3
= 5mΩ · (0.4A)
· F
· F
2
2
PP
·
·
- ESR · 4 · F
O2
= 5mΩ · (21mA)
= 5mΩ · (45mA)
(V
(V
S
S
= 25mV.
1
= 0.4Arms
OUT
OUT
=
=
TM
TM
0.2V · 1.4MHz
0.2V · 1.4MHz
⎞
⎠
) · (V
) · (V
L · F
L · F
3 · 0.3A
3 · 0.3A
S
S
IN(MAX)
IN(MAX)
· V
· V
S
2
IN(MAX)
IN(MAX)
= 0.8mW
=
2
2
- V
- V
= 2.2μW
= 10μW
⎛
⎝
OUT
OUT
= 3.2μF
= 3.2μF
25mV
0.8A
)
)
=
=
2
2
- 5mΩ · 4 · 1.4MHz
·
·
1
1
3
3
w w w . a n a l o g i c t e c h . c o m
w w w . a n a l o g i c t e c h . c o m
·
·
1
10μH · 1.4MHz · 4.2V
⎞
⎠
4.7μH · 1.4MHz · 4.2V
2.5V · (4.2V - 2.5V)
1.8V · (4.2V - 1.8V)
Total Power Solution for Portable Applications
Total Power Solution for Portable Applications
= 6.8μF
= 21mArms
= 45mArms
PRODUCT DATASHEET
PRODUCT DATASHEET
AAT2550178
AAT2550178
2550.2008.02.1.3
2550.2008.02.1.3