Datasheet LTC3897 (Analog Devices) - 10

LTC3897
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Oscillator Frequency Maximum Current Sense SENSE Pin Input Current vs Input Voltage Threshold vs ITH Voltage vs Temperature
600 150 280 ILIM = INTVCC VSENSE = 12V 260 I 240 LIM = FLOAT SENSE+ PIN 550 FREQ = INTV 120 PULSE–SKIPPING MODE CC TAGE (mV) 220 BURST MODE 90 200 500 OPERATION 180 60 I 160 450 LIM = FLOAT 140 30 120 I 100 FREQUENCY (kHz) 400 LIM = GND 0 SENSE CURRENT (µA) 80 FREQ = GND 60 350 –30 40 FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL 20 SENSE– PIN 300 –60 0 5 15 25 35 45 55 65 75 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –75 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) ITH VOLTAGE (V) TEMPERATURE (°C) 3897 G20 3897 G21 3897 G22
SENSE Pin Input Current SENSE Pin Input Current vs ITH Voltage vs VSENSE Voltage
320 320 V 300 SENSE = 12V ILIM = INTVCC 300 SENSE+ PIN ILIM = INTVCC 280 280 260 260 I 240 I SENSE+ PIN LIM = FLOAT 240 LIM = FLOAT 220 220 200 I 200 LIM = GND I 180 LIM = GND 180 160 160 140 140 120 120 100 SENSE CURRENT (µA) 100 80 SENSE CURRENT (µA) 80 60 ILIM = INTVCC 60 ILIM = INTVCC 40 ILIM = FLOAT 40 ILIM = FLOAT 20 SENSE– PIN ILIM = GND 20 SENSE– PIN ILIM = GND 0 0 0 0.20 0.40 0.60 0.80 1 1.20 1.40 1.60 5 10 15 20 25 30 35 40 45 50 55 60 65 ITH VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) 3897 G23 3897 G24
BOOST-SW Charge Pump Charging BOOST-SW Charge Pump Charging Current vs Operating Frequency Current vs Switch Voltage
50 50 VSW = 12V VBOOST – VSW = 7.5V VBOOST – VSW = 7.5V 40 40 FREQ = INTVCC T = –55°C 30 30 FREQ = GND T = 25°C 20 20 T = 155°C 10 10 CHARGE PUMP CHARGING CURRENT (µA) CHARGE PUMP CHARGING CURRENT (µA) 0 0 0 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 45 50 55 60 65 OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 3897 G25 3897 G26 Rev. A 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts