SC4502 Datasheet, PDF (18/19 Pages) Semtech Corporation – 1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start

SC4502/SC4502H
POWER MANAGEMENT
Typical Application Circuits
VIN
L1
D1
VOUT
90
Efficiency at 14V input
14V
SS14
35V
85
1.4MHz 6.8µH
8
6,7
R1
17.4K
80
IN
SW
OFF ON ³ _SHDN
FB ²
75
C1
2.2µF
C3
47nF
10
SC4502H
SS
COMP
1
GND ROSC
4,5 9
R4
R3
5.11K
C4
C2
10µF
R2
649
70
65
60
55
1.5nF
50
1.0MHz 10µH
0
0.05
0.1
0.15
0.2
Load (A)
Figure 13(a). All Ceramic Capacitor High Voltage Application
f (MHz)
1.0
1.4
R₄(KΩ)
15.8
10
L₁
10uH IHLP-2525BD_01
6.8uH IHLP-2525BD_01
Figure 13(b). Efficiency of the All Ceramic Capacitor High
Voltage Application
 2005 Semtech Corp.
18
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