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SC4502 Datasheet(PDF) 18 Page - Semtech Corporation

Part # SC4502
Description  1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
PDF  19 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4502 Datasheet(HTML) 18 Page - Semtech Corporation

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18
 2005 Semtech Corp.
POWER MANAGEMENT
SC4502/SC4502H
www.semtech.com
Typical Application Circuits
C1
2.2
µF
14V
VIN
VOUT
SC4502H
2
3
1
6,7
8
4,5
GND
SHDN
SS
IN
SW
FB
ROSC
COMP
10
9
ON
OFF
C3
SS14
R4
D1
L1
C2
10µF
47nF
R2
649
R1
17.4K
35V
C4
R3
5.11K
1.5nF
Figure 13(a). All Ceramic Capacitor High Voltage Application
f
)
z
H
M
(
R
4 K
(
Ω
Ω
Ω
Ω
Ω)
L
1
0
.
18
.
5
11
0
_
D
B
5
2
5
2
-
P
L
H
I
H
u
0
1
4
.
10
11
0
_
D
B
5
2
5
2
-
P
L
H
I
H
u
8
.
6
Figure 13(b). Efficiency of the All Ceramic Capacitor High
Voltage Application
Efficiency at 14V input
50
55
60
65
70
75
80
85
90
0
0.05
0.1
0.15
0.2
Load (A)
1.0MHz 10
µH
1.4MHz 6.8
µH



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