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SC251 Datasheet(PDF) 16 Page - Semtech Corporation

Part # SC251
Description  Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
PDF  19 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC251 Datasheet(HTML) 16 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC251
POWER MANAGEMENT
Enable Startup
EN
5V/DIV
40μs/DIV
LX
5V/DIV
VOUT
2V/DIV
IIN
500mA/DIV
Load Step Response
VOUT
100mV/DIV
100μs/DIV
ILoad
500mA/DIV
V
IN = 3.6V
V
DAC = 0.6V
ILOAD = 0 - 800mA
V
DAC Step Response (Passthrough)
V
IN = 4.0V
LOAD = 5Ω
MODE = LP
V
DAC = 0 to 1.4V
V
DAC Step Response (100% duty)
VDAC
1V/DIV
VGD
5V/DIV
VOUT
2V/DIV
LX
5V/DIV
100μs/DIV
V
IN = 4.0V
LOAD = 5Ω
MODE = LP
V
DAC = 0 to 1.2V
V
DAC Step Response
100μs/DIV
LX
5V/DIV
2V/DIV
VOUT
5V/DIV
VGD
1V/DIV
VDAC
V
IN = 4.0V
LOAD = 5Ω
MODE = LP
V
DAC = 0 to 1.09V
V
MODE Step Response
VDAC
1V/DIV
100μs/DIV
VGD
5V/DIV
VOUT
2V/DIV
LX
5V/DIV
VMODE
2V/DIV
VGD
5V/DIV
VOUT
2V/DIV
LX
5V/DIV
100μs/DIV
V
IN = 4.0V
LOAD = 5Ω
Mode = LP
V
DAC = 1.07V
Typical Characteristics (Cont.)



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