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ADP2105ACPZ-R7 Arkusz danych(PDF) 23 Page - Analog Devices

Numer części ADP2105ACPZ-R7
Szczegółowy opis  1 Amp/1.5 Amp/2 Amp Synchronous, Step-Down DC-to-DC Converters
PDF  32 Pages
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Strona internetowa  http://www.analog.com
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ADP2105ACPZ-R7 Arkusz danych(HTML) 23 Page - Analog Devices

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ADP2105/ADP2106/ADP2107
Rev. 0 | Page 23 of 32
6.
Because the ADP2106 is being used in this application, the
input capacitors are 10 μF and 4.7 μF X5R Murata capacitors
(GRM21BR61A106K and GRM21BR61A475K).
7.
The input filter consists of a small 0.1 μF ceramic capacitor
placed between IN and AGND and a 10 Ω resistor placed
between IN and PWIN1.
8.
Choose a soft start capacitor of 2 nF to achieve a soft start
time of 2 ms.
9.
Finally, the compensation resistor and capacitor can be
calculated as
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
REF
OUT
OUT
CS
m
CROSS
COMP
V
V
C
G
G
F
R
)
π
2
(
8
.
0
Ω
=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
×
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
×
×
=
k
215
V
8
.
0
V
2
μF
30
V
/
A
8125
.
2
V
/
μA
50
kHz
80
)
π
2
(
8
.
0
pF
39
kΩ
215
kHz
80
π
2
π
2
=
×
×
=
=
COMP
CROSS
COMP
R
F
C



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