Datasheet LTC3786 (Analog Devices) - 7

LTC3786 TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency INTVCC vs Load Current INTVCC vs Load Current vs Temperature
5.50 5.2 600 VIN = 12V VIN = 5V FREQ = INTVCC 5.45 5.0 550 5.40 4.8 500 TAGE (V) 5.35 4.6 450 VOL 5.30 VOLTAGE (V) V CC CC 4.4 FREQUENCY (kHz) 400 INT 5.25 INTV FREQ = GND 4.2 350 5.20 5.15 4.0 300 0 20 40 60 80 100 120 140 160 180 0 10 20 30 40 50 60 –45 –25 –5 15 35 55 75 95 115 135 155 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3786 G20 3786 G18 3786 G19
Oscillator Frequency Maximum Current Sense SENSE Pin Input Current vs Input Voltage Threshold vs ITH Voltage vs Temperature
360 120 260 FREQ = GND V PULSE-SKIPPING MODE SENSE = 12V 358 240 100 FORCED CONTINUOUS MODE 220 356 Burst Mode OPERATION SENSE+ PIN 80 200 354 180 60 352 160 40 140 350 120 20 348 100 346 0 80 SENSE CURRENT (µA) –20 60 OSCILLATOR FREQUENCY (kHz) 344 40 342 –40 20 MAXIMUM CURRENT SENSE VOLTAGE (mV) SENSE– PIN 340 –60 0 5 10 15 20 25 30 35 40 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –45 –25 –5 15 35 55 75 95 115 135 155 INPUT VOLTAGE (V) I TEMPERATURE (°C) 3786 G21 TH VOLTAGE (V) 3786 G22 3786 G23
SENSE Pin Input Current SENSE Pin Input Current Maximum Current Sense vs ITH Voltage vs VSENSE Voltage Threshold vs Duty Cycle
260 260 120 240 VSENSE = 12V 240 220 220 SENSE+ PIN SENSE+ PIN 100 200 200 TAGE (mV) 180 180 80 160 160 140 140 60 120 120 100 100 40 SENSE CURRENT (µA) 80 SENSE CURRENT (µA) 80 60 60 40 40 20 20 SENSE– PIN 20 SENSE– PIN MAXIMUM CURRENT SENSE VOL 0 0 0 0 0.5 1 1.5 2 2.5 3 2.5 7.5 12.5 17.5 22.5 27.5 32.5 37.5 0 10 20 30 40 50 60 70 80 90 100 ITH VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 3786 G24 3786 G25 3786 G26 3786fc For more information www.linear.com/LTC3786 7