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SC250 Datasheet(PDF) 16 Page - Semtech Corporation

Part # SC250
Description  Step-Down DC-DC Converter with Bias LDO for RF Power Amplifi ers
PDF  18 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC250 Datasheet(HTML) 16 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC250
PRELIMINARY
POWER MANAGEMENT
Typical Characteristics (Cont.)
Enable Start-Up
V
EN (2V/div)
V
OUT (1V/div)
V
LX (5V/div)
I
IN (500mA/div)
Time (20μs/div)
Condition V
IN=4.2V, Load=15Ω, VOUT=3.4V
Output Ripple Waveform (V
OUT=3.25V)
V
OUT (50mV/div)
V
LX(5V/div)
Time (1μs/div)
Condition V
IN=4.2V, Load=300mA, VOUT=3.25V
Pass-Through Current Limit
V
OUT (1V/div)
V
LX(2V/div)
Time (1ms/div)
Condition V
IN=3.6V, Load=1Ω, VDAC=1.4V
Output Ripple Waveform (V
OUT=1.5V)
V
OUT (50mV/div)
V
LX(5V/div)
Time (1μs/div)
Condition V
IN=3.6V, Load=300mA, VOUT=1.5V
Load Step response (V
OUT=3.25V)
V
OUT (100mV/div)
I
OUT(500mA/div)
Time (40μs/div)
Condition V
IN=4.2V, Load=600mA-60mA, VOUT=3.25V
Load Step response (V
OUT=1.5V)
V
OUT (100mV/div)
I
OUT(500mA/div)
Time (40μs/div)
Condition V
IN=3.6V, Load=600mA-60mA, VOUT=1.5V



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