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SC4605IMSTRT 数据表(PDF) 13 Page - Semtech Corporation

部件名 SC4605IMSTRT
功能描述  Low Input, High Efficiency Synchronous, Step Down Controller
PDF  19 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC4605IMSTRT 数据表(HTML) 13 Page - Semtech Corporation

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 2004 Semtech Corp.
www.semtech.com
SC4605
POWER MANAGEMENT
Applications Information (Cont.)
Design Example 3: 3.3V to 1.5V @ 15A application with SC4605 and its typical efficiency characteristics.
Figure 7. Schematic for 3.3V/1.5V @ 15A with SC4605 application
Efficiency vs Load current
0.88
0.89
0.9
0.91
0.92
0.93
36
9
12
15
Load current (A)
Vin=3.3V
Vo=1.5V
R3
2.43k
U2
J12
Vout
1
Vout
2
Vout
3
GND
4
GND
5
GND
6
GND
7
GND
8
GND
9
Vout
10
Vout
11
Vout
12
U3
J8
Vin
1
Vin
2
Vin
8
Vin
7
GND
3
GND
4
GND
5
GND
6
C3
4.7u
C2 2.2n
R1
15.8k
C7
470u
C1
270p
C18
0.1u
D2
HC 2-2R 2
2.2u
C5
22u
C4
22u
C17
1u
M11
4 x Si78 82
Vo u t= 1 .5V 15 A
M12
M22
C10
330u
M21
C9
8.2n
R8
115
R7
5.62k
R9
6.49k
R6
1
R5
1
C16
470pF
U1
S C 4605
VCC
2
ISET
3
COMP
4
FSET
5
BST
1
DRVH
10
DRVL
8
VSENSE
6
GND
7
PHASE
9
C12
22u
C13
22u
C14
22u
C11
330u
Vin= 3.3V
R13
1
R3
2.43k
U2
J12
Vout
1
Vout
2
Vout
3
GND
4
GND
5
GND
6
GND
7
GND
8
GND
9
Vout
10
Vout
11
Vout
12
U3
J8
Vin
1
Vin
2
Vin
8
Vin
7
GND
3
GND
4
GND
5
GND
6
C3
4.7u
C2 2.2n
R1
15.8k
C7
470u
C1
270p
C18
0.1u
D2
HC 2-2R 2
2.2u
C5
22u
C4
22u
C17
1u
M11
4 x Si78 82
Vo u t= 1 .5V 15 A
M12
M22
C10
330u
M21
C9
8.2n
R8
115
R7
5.62k
R9
6.49k
R6
1
R5
1
C16
470pF
U1
S C 4605
VCC
2
ISET
3
COMP
4
FSET
5
BST
1
DRVH
10
DRVL
8
VSENSE
6
GND
7
PHASE
9
C12
22u
C13
22u
C14
22u
C11
330u
Vin= 3.3V
R13
1



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