AAT2510IWP-IE-T1 ANALOGICTECH [Advanced Analogic Technologies], AAT2510IWP-IE-T1 Datasheet - Page 15

• Manufacturer Part Number: AAT2510IWP-IE-T1
• Description: Dual 400mA, 1MHz Step-Down DC-DC Converter
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

2.5V Output Capacitor
1.8V Output Capacitor
Input Capacitor
Input Ripple V
2510.2005.08.1.5
C
I
P
C
I
P
C
I
P = esr · I
RMS(MAX)
RMS(MAX)
RMS(MAX)
esr
esr
OUT
OUT
IN
=
= esr · I
= esr · I
=
=
⎛
⎝
V
V
I
=
=
=
O1
3 · ∆I
3 · ∆I
DROOP
DROOP
V
2
2
RMS
I
+
PP
O1
·
·
RMS
RMS
1
1
I
O2
2
LOAD
LOAD
+ I
2
3
3
PP
= 5mΩ · (0.4A)
· F
· F
2
2
·
·
- ESR • 4 • F
O2
= 5mΩ · (29mA)
= 5mΩ · (63mA)
= 25mV.
(V
(V
S
S
1
= 0.4Arms
=
OUT
=
OUT
0.2V · 1MHz
0.2V · 1MHz
⎞
⎠
) · (V
) · (V
L · F · V
L · F · V
3 · 0.3A
3 · 0.3A
IN(MAX)
IN(MAX)
S
2
IN(MAX)
IN(MAX)
= 0.8mW
=
2
2
- V
- V
= 4.2µW
= 20µW
⎛
⎝
= 4.5µF
= 4.5µF
OUT
OUT
25mV
0.8A
)
)
Dual 400mA, 1MHz Step-Down DC-DC Converter
=
=
2
2
- 5mΩ • 4 • 1MHz
·
·
1
1
3
3
·
1
·
10µH · 1MHz · 4.2V
⎞
⎠
4.7µH · 1.0MHz · 4.2V
2.5V · (4.2V - 2.5V)
1.8V · (4.2V - 1.8V)
= 9.5µF
= 29mArms
= 63mArms
AAT2510
15