SC251EVB SEMTECH [Semtech Corporation], SC251EVB Datasheet - Page 16

• Manufacturer Part Number: SC251EVB
• Description: Step-down DC-DC Converter with Bias LDO for WCDMA Amplifi ers
• Manufacturer: SEMTECH [Semtech Corporation]

Typical Characteristics (Cont.)
POWER MANAGEMENT
500mA/DIV
© 2006 Semtech Corp.
IIN
5V/DIV
1V/DIV
5V/DIV
VGD
5V/DIV
5V/DIV
2V/DIV
1V/DIV
2V/DIV
5V/DIV
5V/DIV
VOUT
2V/DIV
VDAC
VDAC
VOUT
EN
LX
VOUT
VGD
LX
LX
V
DAC
Step Response (Passthrough)
V
DAC
Enable Startup
Step Response
40μs/DIV
100μs/DIV
100μs/DIV
V
LOAD = 5Ω
MODE = LP
V
IN
DAC
V
LOAD = 5Ω
MODE = LP
V
= 4.0V
IN
DAC
= 0 to 1.4V
= 4.0V
= 0 to 1.09V
16
100mV/DIV
500mA/DIV
VMODE
2V/DIV
5V/DIV
5V/DIV
2V/DIV
1V/DIV
5V/DIV
2V/DIV
5V/DIV
VOUT
VGD
ILoad
VDAC
VOUT
VOUT
VGD
LX
LX
V
DAC
Step Response (100% duty)
Load Step Response
V
MODE
100μs/DIV
100μs/DIV
100μs/DIV
Step Response
V
LOAD = 5Ω
MODE = LP
V
IN
DAC
V
LOAD = 5Ω
Mode = LP
V
IN
DAC
= 4.0V
= 0 to 1.2V
= 4.0V
= 1.07V
ILOAD = 0 - 800mA
V
V
IN
DAC
www.semtech.com
= 3.6V
= 0.6V
SC251