SC1101CS Ver la hoja de datos (PDF) - Semtech Corporation
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SC1101CS Datasheet PDF : 7 Pages
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POWER MANAGEMENT
Applications Information (Cont.)
Layout diagram for the SC1101
VO = VREF (1 + Ra/Rb)
12V IN
5V
10
0.1uF
0.001uF
SC1101CS
1 VCC
GND 8
2 CS(-)
FB 7
3 CS(+) BST 6
4 PGND
DH 5
Heavy lines indicate
high current paths.
Q1
Cin +
Rb
4uH
D1
Ra
SC1101
+
Cout
Vout
Application Circuit
5V to 2.0V @ 10A (Bootstrapped)
D1
LL42
+5V
GND
C1
1.0
C2
C3
150/6.3V 150/6.3V
C7
0.1
Q1
IRLR3103
L1
R5
4uH
0.05
D2
MBRD1035L
C8
C9
C10
C11
330/2.5V 330/2.5V 330/2.5V 1.0
+
R6
76.8 *see note
Vout = 2V @ 10A
R7
127
GND
R1
10
R2
R3
1k
1k
U1
SC1101
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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