SC1408IMS.TR 데이터 시트보기 (PDF) - Semtech Corporation
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SC1408IMS.TR Datasheet PDF : 12 Pages
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POWER MANAGEMENT
Typical Application Circuit (Cont.)
Fig.3: Achieving output voltages greater than 16.5V
D4
R6 470
3.3V IN
1N4148
L1 22uH
C2
100uF +
C4 0.1uF
C5
D3
0.1uF
12V
U1
2 BST GATE 1
4 EN ISENSE 8
5 REF
FB 3
7 GND AGND 6
SC1408CS
SC1408
D1
B130T
R3
200k
Q1
IRL3103S
25V OUT
+
C8
100uF
R2
0.05Ohm
R4
10.0k
+
C3
100uF
Fig.4: Implementing shutdown with input/output isolation
3.3V IN
Q2
Si2301DS
R5
5.1k
J1
SHORT = RUN
OPEN = SHUTDOWN
1
2
C4
C2
100uF +
0.1uF
C5
0.1uF
L1 22uH
U1
2 BST GATE 1
4 EN ISENSE 8
5 REF FB 3
7 GND AGND 6
SC1408CS
D1
B130T
R3
90k
Q1
IRLL3303
12V OUT
+
C8
100uF
R2
0.05Ohm
R4
10.0k
+
C3
100uF
2005 Semtech Corp.
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