SC2442H 查看數據表（PDF） - Semtech Corporation
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SC2442H Datasheet PDF : 10 Pages
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SC2442/H
POWER MANAGEMENT
Application Information (Contd)
VIN
J1-1
J1-2
J1-3
4.75-6V
C2
C7
C8
TP1
PVCC
R1 0.075R, 1/4W
R2 0.06R, 1/4W
100R
C2210 nF
R3 R4
100R
OC1
C23
10 nF
OC2
RTN
C10
15 uF R9 R10
C11
15 uF
C16 0.22 uF
C17 0.1 uF
R11 40.2K
SS1
SS2
OSC
3 VIN
2
BDI
U1 OC 1 4
21
OC 2
1 AVCC
GD1H 9
13 P VCC
GD 1L 11
7
SS1
16
GD2H
18 SS2
GD 2L 14
23 ROSC
P H1 10
6
FB1
8
BST1
5 E A1
P H2 15
19 FB2
BST2 17
20
E A2
12
PGND
22 SYNC/E N AG ND 24
QD1
FDS6982S
8765
•••
R7 3.3R
R5 2R
QB
• QT
1234
D1 D2
QD2
FDS6982S
8765
•••
R6 2R
QB
• QT
1234
R8 3.3R
PH1
BST1
PH2
BST2
C12 2.2 uF
C13 2.2 uF
ENA
C20
R12
47 pF EA1
C18
220K
4.7 nF
FB1
C21 47 pF
EA2
R13
C19
100K
10 nF
FB2
TP2
L1 P1166.473T
1
2
C3
100 uF 4V
3.3V/0.6A
VOUT1
C14
J2-1
RTN
TP3
L2 P1166.223T
1
2
1.8V/1A
VOUT2
C4
C15
100 uF 4V
J2-2
J2-4
J2-3
RTN
1 nF
R16
C24
R17
100R
14K
C25
1 nF
R18
R19
34K
100R
R14
R15
10K
10K
Fig 1) Application Circuit for 5V to 3.3V/1.8V Low Power Dual Synchronous Buck Convertor
Input 5V
3.3V Output
1.8V Output
Fig 2) Input and output rise times with full load
© 2007 Semtech Corp.
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