sc250wltrt Semtech Corporation, sc250wltrt Datasheet - Page 16

• Manufacturer Part Number: sc250wltrt
• Description: Sc250 Step-down Dc-dc Converter With Bias Ldo For Rf Power Amplifiers
• Manufacturer: Semtech Corporation

© 2006 Semtech Corp.
POWER MANAGEMENT
Typical Characteristics (Cont.)
Condition V
Output Ripple Waveform (V
Load Step response (V
Condition V
Condition V
IN
=4.2V, Load=600mA-60mA, V
Enable Start-Up
IN
IN
=3.6V, Load=300mA, V
Time (40μs/div)
=4.2V, Load=15Ω, V
Time (20μs/div)
Time (1μs/div)
OUT
=3.25V)
OUT
OUT
OUT
=3.4V
OUT
=1.5V)
=1.5V
=3.25V
V
I
V
V
V
I
V
V
OUT
IN
OUT
EN
OUT
LX
OUT
LX
(500mA/div)
(500mA/div)
(5V/div)
(5V/div)
(2V/div)
(100mV/div)
(1V/div)
(50mV/div)
16
Condition V
Output Ripple Waveform (V
Condition V
Load Step response (V
Condition V
Pass-Through Current Limit
IN
=3.6V, Load=600mA-60mA, V
IN
=4.2V, Load=300mA, V
IN
Time (40μs/div)
Time (1μs/div)
Time (1ms/div)
=3.6V, Load=1Ω, V
OUT
DAC
OUT
=1.5V)
OUT
=1.4V
=3.25V)
=3.25V
OUT
=1.5V
PRELIMINARY
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V
V
V
I
V
V
OUT
OUT
LX
OUT
OUT
LX
SC250
(5V/div)
(2V/div)
(500mA/div)
(50mV/div)
(100mV/div)
(1V/div)