Datasheet

LTC3549
6
3549f
1µs/DIV
V
OUT
20mV/DIV
AC COUPLED
V
SWITCH
2V/DIV
I
L
100mA/DIV
3549 G19
V
IN
= 2.5V
V
OUT
= 1.2V
I
LOAD
= 2OmA
Load Step 0mA to 250mA
Pulse Skip
Load Step 25mA to 250mA
Pulse Skip
Burst Mode Operation
I
LOAD
= 20mA
Load Step 0mA to 250mA
Burst Mode Operation
Load Step 25mA to 250mA
Burst Mode Operation
TYPICAL PERFOR A CE CHARACTERISTICS
UW
(From Typical Application on the front page, except for the resistive divider resistor values)
200µs/DIV
V
OUT
500mV/DIV
V
RUN
1V/DIV
I
L
50mA/DIV
3549 G16
V
IN
= 3.6V
V
OUT
= 1.2V
1kΩ Load
20µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
200mA/DIV
I
L
200mA/DIV
3549 G17
V
IN
= 2.2V
V
OUT
= 1.2V
20µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
200mA/DIV
I
L
200mA/DIV
3549 G18
V
IN
= 2.2V
V
OUT
= 1.2V
20µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
200mA/DIV
I
L
200mA/DIV
3549 G20
V
IN
= 2.2V
V
OUT
= 1.2V
20µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
200mA/DIV
I
L
200mA/DIV
3549 G21
V
IN
= 2.2V
V
OUT
= 1.2V
Start-Up from Shutdown
Burst Mode Operation