SC4605IMSTR View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4605IMSTR' PDF : 19 Pages View PDF
SC4605
POWER MANAGEMENT
Applications Information (Cont.)
Design Example 3: 3.3V to 1.5V @ 15A application with SC4605 and its typical efficiency characteristics.
D2
1u
C17
R3
2.43k
C1
270p
C18
0.1u
C2 2.2n
R1
15.8k
R13
1
C3
4.7u
C16
470pF
U1
1 BST
2 VCC
3 ISET
4 COMP
5 FSET
DRVH 10
R6
PHASE 9
1
DRVL 8
R5
GND 7
1
VSENSE 6
S C 4605
C10
330u
C11
330u
V in= 3.3V
C12
22u
C13
C14
22u
22u
M11
M12
M21
M22
H C 2-2R 2
2.2u
C7
470u
4 x S i78 82
V o ut= 1.5V 15 A
C5
C4
C9
22u
22u
8.2n R7
5.62k
R8
115
U3
1
2
3
4
Vin
Vin
GND
GND
J8
Vin
Vin
GND
GND
8
7
6
5
U2
1
2
3
4
5
6
Vout
Vout
Vout
GND
GND
GND
Vout
Vout
Vout
GND
GND
GND
12
11
10
9
8
7
J12
R9
6.49k
Figure 7. Schematic for 3.3V/1.5V @ 15A with SC4605 application
Efficiency vs Load current
0.93
0.92
0.91
0.9
0.89
Vo=1.5V
0.88
3
6
9
12
15
Load current (A)
Vin=3.3V
2004 Semtech Corp.
13
www.semtech.com
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