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SC4503 датащи(PDF) 17 Page - Semtech Corporation

номер детали SC4503
подробное описание детали  1.3MHz Step-Up Switching Regulator with 1.4A Switch
PDF  22 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4503 датащи(HTML) 17 Page - Semtech Corporation

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 2007 Semtech Corp.
www.semtech.com
SC4503
POWER MANAGEMENT
Typical Application Circuits
VOUT
C1
4.7
µF
SC4503
3
1
5
2
GND
SHDN/SS
IN
SW
FB
4
10BQ015
D1
L1
C2
10
µF
R2
60.4k
R1
187k
5V
1.5
µH
R3
15k
C3
56nF
2.6 - 4.2V
1-CELL
LI-ION
ON
OFF
3.3V
< 0.4V
C4
10pF
Efficiency vs Load Current
50
55
60
65
70
75
80
85
90
95
0.001
0.010
0.100
1.000
Load Current (A)
VOUT = 5V
1.3MHz
VIN = 3.6V
VIN = 2.6V
VIN = 4.2V
Upper Trace : Output Voltage, AC Coupled, 0.2V/div
Lower Trace : Inductor Current, 0.5A/div
Upper Trace : Output Voltage, AC Coupled, 0.2V/div
Lower Trace : Inductor Current, 0.5A/div
Load Transient Response. I
OUT is switched
between 0.15A and 0.9A
Figure 11(d).
Load Transient Response. I
OUT is switched
between 0.1A and 0.5A
Figure 11(c).
VIN = 2.6V
VIN = 4.2V
40
µs/div
40
µs/div
Efficiency of the Li-ion Cell to 5V
Boost Converter
Figure 11(b).
Figure 11(a). Single Li-ion Cell to 5V Boost Converter
L1: TDK VLF4012AT
C1: Murata GRM188R60J475K
C2: Murata GRM21BR60J106K



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