Datasheet LTC3546 (Analog Devices) - 7

LTC3546
TYPICAL PERFORMANCE CHARACTERISTICS OUT2 Pulse-Skipping Mode OUT2 Forced Continuous Mode OUT2 Burst Mode Operation Operation Operation
VOUT VOUT VOUT 20mV/DIV 20mV/DIV 20mV/DIV ILOAD 500mA/DIV ILOAD 250mA/DIV ILOAD 250mA/DIV 1µs/DIV 3546 G11 1µs/DIV 3546 G12 1µs/DIV 3546 G13 SW1D CONNECTED TO SW1 SW1D CONNECTED TO SW1 SW1D CONNECTED TO SW1 VIN = 3.6V VIN = 3.6V VIN = 3.6V VOUT = 2.5V VOUT = 1.8V VOUT = 1.8V ILOAD = 300mA ILOAD = 200mA ILOAD = 100mA
OUT1 Efficiency vs Load Current OUT1 Efficiency vs Load Current OUT2 Efficiency vs Load Current
95 95 100 SW1D CONNECTED TO SW1 SW1D CONNECTED TO SW2 SW1D CONNECTED TO SW2 V V V 90 IN = 3.6V IN = 3.6V 95 IN = 3.6V V 90 OUT = 1.8V VOUT = 1.8V VOUT = 2.5V 90 85 85 85 80 80 80 75 75 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 75 70 Burst Mode 70 Burst Mode 70 Burst Mode OPERATION OPERATION OPERATION 65 PULSE SKIP 65 PULSE SKIP 65 PULSE SKIP FORCED FORCED FORCED CONTINUOUS CONTINUOUS CONTINUOUS 60 60 60 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 0.001 0.01 0.1 1 10 ILOAD (A) ILOAD (A) ILOAD (A) 3546 G14 3546 G15 3546 G16
OUT2 Efficiency vs Load Current OUT1 Efficiency vs VIN OUT1 Efficiency vs VIN
100 100 100 SW1D CONNECTED TO SW1 SW1D CONNECTED TO SW1 SW1D CONNECTED TO SW2 95 VIN = 3.6V 98 VOUT = 1.8V 98 VOUT = 1.8V VOUT = 2.5V 96 96 90 94 94 85 92 400mA 92 80 90 200mA 90 88 88 EFFICIENCY (%) 75 EFFICIENCY (%) EFFICIENCY (%) 86 2A 86 70 Burst Mode OPERATION 84 1A 84 65 PULSE SKIP FORCED 82 82 CONTINUOUS 60 80 80 0.001 0.01 0.1 1 10 2.25 2.75 3.25 3.75 4.25 4.75 5.25 2.25 2.75 3.25 3.75 4.25 4.75 5.25 ILOAD (A) VIN (V) VIN (V) 3546 G17 3546 G18 3546 G19 3546fd For more information www.linear.com/3546 7