Datasheet LTC3401 (Analog Devices) - 4

LTC3401
W U TYPICAL PERFOR A CE CHARACTERISTICS Transient Response 50mA to 500mA Burst Mode Operation Burst Mode Operation
VOUT V V OUT OUT AC AC 200mV/DIV 100mV/DIV 100mV/DIV SW 550mA 1V/DIV SW IOUT 1V/DIV 50mA COUT = 22μF 200μs/DIV 3401 G04 VIN = 1.2V 5ms/DIV 3401 G05 VIN = 1.2V 200μs/DIV 3401 G06 L = 3.3μH VOUT = 3.3V VOUT = 3.3V fOSC = 1MHz COUT = 100μF COUT = 100μF IOUT = 250μA IOUT = 20mA MODE/SYNC PIN = HIGH MODE/SYNC PIN = HIGH
Converter Efficiency 1.2V to 3.3V Converter Efficiency 2.4V to 3.3V Converter Efficiency 3.6V to 5V
100 100 100 Burst Mode OPERATION 90 300kHz 90 Burst Mode 90 Burst Mode OPERATION 80 OPERATION 80 80 3MHz 3MHz 70 70 70 300kHz 1MHz 1MHz 60 60 60 FIXED 1MHz FREQUENCY 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 20 20 10 10 10 0 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) LOAD CURRENT (mA) 3401 G07 3401 G08 3401 G10
Start-Up Voltage Efficiency Loss Without Schottky vs IOUT vs Frequency Current Limit
500 14 1.80 TA = 25°C TA = 25°C 12 1.75 400 1.70 10 1.65 300 8 1.60 6 200 CURRENT (A) 1.55 EFFICIENCY LOSS (%) 4 OUTPUT CURRENT (mA) 1.50 100 2 1.45 0 0 1.40 0.8 0.9 1 1.1 1.2 1.3 1.4 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 –55 –15 25 65 105 125 VIN (V) FREQUENCY (MHz) TEMPERATURE (°C) 3401 G09 3401 G11 3401 G12 3401fb 4