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SC2441ITSTRT Datasheet(PDF) 26 Page - Semtech Corporation

Part # SC2441ITSTRT
Description  Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
PDF  35 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2441ITSTRT Datasheet(HTML) 26 Page - Semtech Corporation

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 2005 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2441
In Figure 17, C
o3 and Resr3 are the capacitance and the
ESR of the output capacitor, g
m3 is the error amplifier
transconductance and k
3 is the current loop gain. If one
specifies the loop crossover frequency f
c,
the
compensation component values are readily calculated
as
,
R
5
.
0
R
R
f
2
1
|
f
f
1
|
2
R
)
D
1
(
k
g
h
C
3
o
3
esr
3
esr
c
1
z
c
3
o
3
3
3
m
3
4
+
π
−
−
=
)
2
R
R
(
C
C
1
R
3
o
3
esr
3
o
4
4
+
=
and
3
o
3
esr
4
5
R
R
2
C
C
=
with
.
L
2
R
)
D
1
(
f
3
3
o
2
3
1
z
π
−
=
Applications Information (Cont.)
Bode plots of the loop response are shown in Figure 18.
Figure 18. Typical loop transfer function Bode plot of
the Boost converter.



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