Datasheet LTC3812-5 (Analog Devices) - 6

LTC3812-5
TYPICAL PERFORMANCE CHARACTERISTICS Current Sense Threshold ITH Voltage vs Load Current vs ITH Voltage On-Time vs ION Current
3.0 400 10000 VRNG = 1V V V RNG = 2V ON = INTVCC FRONT PAGE CIRCUIT 300 2.5 1.4V 200 2.0 1V 1000 100 0.7V 0.5V TAGE (V) 1.5 0 VOL I TH –100 ON-TIME (ns) 1.0 100 –200 0.5 CURRENT SENSE THRESHOLD (mV) –300 0 –400 10 0 1 2 3 4 5 6 7 0 0.5 1 1.5 2 2.5 3 10 100 1000 10000 LOAD CURRENT (A) ITH VOLTAGE (V) ION CURRENT (μA) 38125 G10 38125 G11 38125 G12
Maximum Current Sense On-Time vs Temperature Current Limit Foldback Threshold vs VRNG Voltage
680 250 400 ION = 300μA VRNG = INTVCC 660 200 300 640 150 620 200 ON-TIME (ns) 100 600 100 50 580 560 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 0.5 1 1.5 2 TEMPERATURE (°C) VFB (V) VRNG VOLTAGE (V) 38125 G13 38125 G14 38125 G15
Maximum Current Sense Reference Voltage Driver Peak Source Current Threshold vs Temperature vs Temperature vs Temperature
230 0.803 1.5 VRNG = INTVCC VBOOST = VINTVCC = 5V 0.802 220 0.801 210 0.800 1.0 200 0.799 REFERENCE VOLTAGE (V) 190 PEAK SOURCE CURRENT (A) 0.798 MAXIMUM CURRENT SENSE THRESHOLD (mV) 180 0.797 0.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 38125 G16 38125 G17 38125 G18 38125fc 6