Datasheet LTC3527, LTC3527-1 (Analog Devices) - 5

LTC3527/LTC3527-1
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted) Maximum Output Current Maximum Output Current No-Load Input Current vs VIN vs VIN for Converter 1 vs VIN for Converter 2
180 800 500 1.2MHz VOUT = 3.3V V 160 OUT = 450 700 2.5V VOUT = 3.3V 400 140 V V 600 V OUT = OUT = 5V OUT = 350 2.5V 120 1.8V 500 VOUT = 300 100 1.8V (μA) 400 250 I IN 80 200 300 60 VOUT = 5V 150 OUTPUT CURRENT (mA) 200 OUTPUT CURRENT (mA) VOUT = 5V 40 100 V V 20 V OUT = OUT = 3.3V OUT = 100 50 2.4V 1.8V 0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0.5 1 1.5 2 2.5 3 3.5 4 4.5 VIN (V) VIN (V) VIN (V) 35271 G09 35271 G10 35271 G11
Minimum Load Resistance During Burst Mode Threshold Current Burst Mode Threshold Current Start-Up vs VIN vs VIN for VOUT1 = VOUT2 = 1.8V vs VIN for VOUT1 = VOUT2 = 3.3V
1000 14 25 2.2MHz OPERATION 2.2MHz OPERATION CONVERTER 1 12 CONVERTER 1 LEAVE CONVERTER 2 CONVERTER 2 20 BURST 10 CONVERTER 2 15 8 ENTER 100 LEAVE BURST BURST 6 10 LOAD CURRENT (mA) 4 LOAD CURRENT (mA) LOAD RESISTANCE (Ω) CONVERTER 1 ENTER BURST 5 2 10 0 0 0.635 0.685 0.735 0.785 0.835 0.885 0.935 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VIN (V) VIN (V) VIN (V) 35271 G12 35271 G13 35271 G14
Burst Mode Threshold Current Oscillator Frequency vs VIN for VOUT1 = VOUT2 = 5V vs Temperature
70 2.50 2.2MHz OPERATION CONVERTER 1 FSEL = 3.3V 60 CONVERTER 2 50 LEAVE BURST 2.00 ENTER BURST VIN = 1.2V 40 VOUT = 3.3V 30 FREQUENCY (MHz) 1.50 LOAD CURRENT (mA) 20 FSEL = 0V 10 0 1.00 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 –45 –30 –15 0 15 30 45 60 75 90 V TEMPERATURE (°C) IN (V) 35271 G16 35271 G15 35271fc 5