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SC1101 Datasheet(PDF) 5 Page - Semtech Corporation

Part # SC1101
Description  Asynchronous Voltage Mode PWM Controller
PDF  7 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1101 Datasheet(HTML) 5 Page - Semtech Corporation

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 2005 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC1101
Vout
5V
4uH
+
Cout
+
Cin
10
0.1uF
Q1
0.001uF
12V IN
Heavy lines indicate
high current paths.
D1
SC1101CS
GND
8
VCC
1
CS(-)
2
CS(+)
3
PGND
4
DH
5
BST
6
FB
7
Rb
Ra
Applications Information (Cont.)
Layout diagram for the SC1101
V
O = VREF (1 + Ra/Rb)
Q1
IRLR3103
R4
2.2
R2
1k
D2
MBRD1035L
R1
10
L1
4uH
C8
330/2.5V
C9
330/2.5V
C10
330/2.5V
C3
150/6.3V
C2
150/6.3V
C5
0.001
R7
127
R6
76.8 *see note
C1
1.0
C6
0.01
+
+5V
GND
C7
0.1
C11
1.0
R5
0.05
R3
1k
GND
VCC
1
CS(-)
2
CS(+)
3
PGND
4
DH
5
BST
6
FB
7
GND
8
U1
SC1101
* NOTE:
R6 = R7 x (Vout/1.25 - 1) rounded to nearest 1%value
C4
0.1
D1
LL42
Vout = 2V @ 10A
Application Circuit
5V to 2.0V @ 10A (Bootstrapped)



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