SC1103CSTRT Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
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Fabricante
SC1103CSTRT Datasheet PDF : 7 Pages
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POWER MANAGEMENT
Applications Information (Cont.)
Layout diagram for the SC1103
VO = VREF (1 + Ra/Rb)
20-24V BST
12VIN
SC1103
10
0.1uF
0.001uF
SC1103CS
1 VCC
8
GND
2 CS(-)
FB 7
3 CS(+) BST 6
4 PGND
DH 5
Heavy lines indicate
high current paths.
Q1
Cin +
Rb
6uH
D1
Ra
+
Cout
Vout
Application Circuit
12V to 2.5V @ 10A (Bootstrapped)
D1
LL4148
+12V
GND
C1
1.0
C2
C3
47/16V 47/16V
C7
0.1
Q1
IRLR3103
L1
R5
6uH
0.05
D2
MBRD1035L
C8
C9
C10
C11
220/4V 220/4V 220/4V 1.0
+
R6
76.8 *see note
Vout = 2.5V @ 10A
R7
127
GND
R1
10
R2
R3
1k
1k
U1
SC1103
C6
R4
1 VCC
GND 8
0.01
2.2
2 CS(-)
FB 7
C4
C5
0.1
0.001
3 CS(+)
BST 6
4 PGND
DH 5
* NOTE:
R6 = R7 x (Vout/1.25 - 1) rounded to nearest 1%value
2005 Semtech Corp.
5
www.semtech.com
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