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SC4503 Datasheet(PDF) 15 Page - Semtech Corporation

Part # SC4503
Description  1.3MHz Step-Up Switching Regulator with 1.4A Switch
PDF  22 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4503 Datasheet(HTML) 15 Page - Semtech Corporation

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 2007 Semtech Corp.
www.semtech.com
SC4503
POWER MANAGEMENT
L1: Murata LQH32C
C1: Murata GRM219R60J475K
5V
C1
4.7
µF
ZHCS400
D1
0.22
µF
C2
C5
22nF
L1
C3
56nF
10
µH
SC4503
3
1
5
2
GND
SHDN/SS
IN
SW
FB
4
C4
220pF
R1
63.4
301k
R4
R2
63.4
D2
24V
_
+
MM5Z24VT1
R3
54.9k
Driving Two 6 White LED Strings from 5V. Zener diode D
2 protects the converter
from over-voltage damage when both LED strings become open.
Figure 9.
Typical Application Circuits



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