Datasheet LTC3542 (Analog Devices) - 5

LTC3542
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. RDS(ON) vs Temperature Switch Leakage vs Input Voltage Switch Leakage vs Temperature
0.9 1000 300 0.8 900 250 0.7 800 MAIN SWITCH 0.6 700 200 ) Ω 600 ( 0.5 500 150 0.4 MAIN SWITCH DS(ON)R 400 SYNCHRONOUS 0.3 SWITCH 100 300 SWITCH LEAKAGE (nA) 0.2 LEAKAGE CURRENT (pA) SYNCHRONOUS V 200 IN = 2.7V SWITCH 50 MAIN SWITCH 0.1 VIN = 3.6V SYNCHRONOUS SWITCH 100 VIN = 4.2V 0 0 0 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3542 G13 3542 G14 3542 G15
Effi ciency vs Input Voltage Effi ciency vs Load Current
100 100 90 90 80 80 70 V 60 70 OUT = 1.8V Burst Mode OPERATION FIGURE 3a CIRCUIT 50 60 40 EFFICIENCY (%) EFFICIENCY (%) 50 IOUT = 500mA 30 IOUT = 100mA I 20 OUT = 10mA V V 40 OUT = 1.8V IN = 2.7V IOUT = 1mA 10 Burst Mode OPERATION VIN = 3.6V IOUT = 0.1mA FIGURE 3a CIRCUIT VIN = 4.2V 30 0 2.5 3 3.5 4 4.5 5 5.5 0.1 1 10 100 1000 INPUT VOLTAGE (V) OUTPUT CURRENT (mA) 3542 G16 3542 G17
Effi ciency vs Load Current Effi ciency vs Load Current
100 100 Burst Mode 90 90 OPERATION 80 80 70 70 60 60 50 50 PULSE SKIP MODE 40 40 EFFICIENCY (%) EFFICIENCY (%) 30 30 20 20 V V OUT = 1.2V IN = 2.7V VIN = 3.6V 10 Burst Mode OPERATION VIN = 3.6V 10 VOUT = 1.8V FIGURE 3a CIRCUIT VIN = 4.2V FIGURE 3a CIRCUIT 0 0 0.1 1 10 100 1000 0.1 1 10 100 1000 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3542 G18 3542 G19 3542fa 5