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| LTC3549 Datasheet, PDF (6/16 Pages) Linear Technology – 250mA Low VIN Buck Regulator in 2mm × 3mm DFN | |||
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LTC3549
TYPICAL PERFOR A CE CHARACTERISTICS
(From Typical Application on the front page, except for the resistive divider resistor values)
Start-Up from Shutdown
Burst Mode Operation
Burst Mode Operation
ILOAD = 20mA
VOUT
500mV/DIV
VRUN 1V/DIV
IL
50mA/DIV
VIN = 3.6V
VOUT = 1.2V
1k⦠Load
200µs/DIV
3549 G16
VOUT
20mV/DIV
AC COUPLED
VSWITCH
2V/DIV
IL
100mA/DIV
VIN = 2.5V
VOUT = 1.2V
ILOAD = 2OmA
1µs/DIV
3549 G19
Load Step 25mA to 250mA
Pulse Skip
VOUT
100mV/DIV
AC COUPLED
ILOAD
200mA/DIV
IL
200mA/DIV
VIN = 2.2V
VOUT = 1.2V
20µs/DIV
3549 G18
Load Step 0mA to 250mA
Pulse Skip
VOUT
100mV/DIV
AC COUPLED
ILOAD
200mA/DIV
IL
200mA/DIV
VIN = 2.2V
VOUT = 1.2V
20µs/DIV
3549 G17
Load Step 0mA to 250mA
Burst Mode Operation
VOUT
100mV/DIV
AC COUPLED
ILOAD
200mA/DIV
IL
200mA/DIV
VIN = 2.2V
VOUT = 1.2V
20µs/DIV
3549 G20
Load Step 25mA to 250mA
Burst Mode Operation
VOUT
100mV/DIV
AC COUPLED
ILOAD
200mA/DIV
IL
200mA/DIV
VIN = 2.2V
VOUT = 1.2V
20µs/DIV
3549 G21
3549f
6
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