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SC4603IMSTRT Datasheet(PDF) 13 Page - Semtech Corporation

Part # SC4603IMSTRT
Description  Very Low Input, MHz Operation, High Efficiency Synchronous Buck
PDF  16 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4603IMSTRT Datasheet(HTML) 13 Page - Semtech Corporation

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 2004 Semtech Corp.
www.semtech.com
SC4603
POWER MANAGEMENT
Applications Information - (Cont.)
Layout Guidelines (Cont.)
8. Maximize the trace width of the loop connecting the
inductor, bottom MOSFET and the output capacitors.
9. Connect the ground of the feedback divider and the
compensation components directly to the GND pin
of the SC4603 by using a separate ground trace.
Then connect this pin to the ground of the output
capacitor as close as possible.
Design Example 1: 3.3V to 1.5V @ 5A application with
SC4603 (NH020 footprint).
Figure 5. Schematic for 3.3V/1.5V @ 5A application
VCC
1
SYNC/SLEEP
2
COMP
3
VSENSE
4
FS
5
ISET
6
PHASE
7
GND
8
NDRV
9
PDRV
10
U1
SC4603
R15
1
C3
4.7u
R2
3.32k
C7
150u
C14
33n
R6
1.0
R5
1.0
R9
6.49k
M2
C10
22u
C11
22u
Vo = 1.5V/5A
C4
22u
RT 21k
C1
150p
C2
820p
R1
20k
R3
L1
1.1u
Vin = 3.3V
C9
820p
R8
604
M1
R7
13k



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