Datasheet LTC3549 (Analog Devices) - 6

LTC3549
W U 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 20mV/DIV AC COUPLED VOUT VSWITCH 500mV/DIV 2V/DIV VRUN 1V/DIV IL 100mA/DIV IL 3549 G19 50mA/DIV 3549 G16 200µs/DIV 1µs/DIV V V IN = 3.6V IN = 2.5V V V OUT = 1.2V OUT = 1.2V 1k I Ω Load LOAD = 2OmA
Load Step 25mA to 250mA Load Step 0mA to 250mA Pulse Skip Pulse Skip
V V OUT OUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED I I LOAD LOAD 200mA/DIV 200mA/DIV IL IL 200mA/DIV 200mA/DIV 3549 G18 3549 G17 20µs/DIV 20µs/DIV V V IN = 2.2V IN = 2.2V V V OUT = 1.2V OUT = 1.2V
Load Step 0mA to 250mA Load Step 25mA to 250mA Burst Mode Operation Burst Mode Operation
VOUT VOUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED ILOAD ILOAD 200mA/DIV 200mA/DIV I I L L 200mA/DIV 200mA/DIV 3549 G20 3549 G21 20µs/DIV 20µs/DIV VIN = 2.2V VIN = 2.2V VOUT = 1.2V VOUT = 1.2V 3549f 6