SC1417BEVB データシートの表示（PDF） - Semtech Corporation
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SC1417BEVB Datasheet PDF : 11 Pages
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SC1417B
POWER MANAGEMENT
Typical Application Circuits(1)
VIN
GND
R2
R3
1M
1M
C1
22uF,6.3V
R6
130k
C6
10nF
L1
15uH
D1
SMB5819
U1
6 IN
LX 5
7 LBI
FB 2
3 EN
LBO 8
1 COMP GND 4
SC1417B
R5
33k
R4
C3
2.2nF
IOUT
=
1.22V
R4
25 mA out (12V compliant)
VOUT
LED,3.5V
LED,3.5V
LBO OUT
LED,3.5V
C2
4.7uF,16V
Inductor:
Falco P/N SDIP0302-156 (305) 622-9076
or
GND Coilcraft P/N DT1608C-153 (847) 639-6400
Figure 1 - Constant Brightness LED driver with 12V compliance from 2-cells (constant current output)
VIN = 2V to 5V
D1
VOUT = 12V, 75mA
L1
SMB5819
15uH
R2
1M
C1
10uF,6.3V
R6
130k
GND
C6
10nF
U1
6 IN
LX 5
7 LBI
FB 2
3 EN
LBO 8
1 COMP GND 4
SC1417B
R5
33k
C3
2.2nF
R1
1.00M
R4
115k
1uF,16V
C2
R3
1M
LBO OUT
ENABLE
GND
Figure 2 - Minimum Capacitance Boost Converter
Note:
(1) Value of C1 depends on proximity of input source voltage and source impedance (use C1 > 47µF if the input
supply is greater than two inches from the SC1417B).
2006 Semtech Corp.
9
www.semtech.com
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