Datasheet LT1249 (Linear Technology) - 4

LT1249
W U TYPICAL PERFORMANCE CHARACTERISTICS Reference Voltage vs Temperature Multiplier Current
7.536 300 7.524 VAOUT = 6.5V VAOUT = 5V 7.512 VAOUT = 6V 7.500 VAOUT = 5.5V VAOUT = 4.5V 7.488 µA) ( 150 7.476 I M VAOUT = 4V 7.464 VAOUT = 3.5V REFERENCE VOLTAGE (V) 7.452 VAOUT = 3V 7.440 VAOUT = 2.5V 7.428 0 VAOUT = 2V –75 –50 –25 0 25 50 75 100 125 150 0 250 500 JUNCTION TEMPERATURE (°C) IAC (µA) 1249 G03 1249 G04
Supply Current vs Supply Voltage GTDR Source Current GTDR Sink Current
10 18.5 1.1 T V 9 J = –55°C 18.0 CC = 18V 1.0 8 TJ = 25°C 17.5 0.9 17.0 7 0.8 TJ = 125°C 16.5 0.7 6 16.0 0.6 5 15.5 T 0.5 4 J = 125°C TA = –55°C 15.0 0.4 T 3 GTDR VOLTAGE (V) J = 25°C GTDR VOLTAGE (V) SUPPLY CURRENT (mA) 14.5 0.3 2 T 14.0 J = –55°C 0.2 TA = 25°C 1 13.5 0.1 TA = 125°C 0 13.0 0 10 12 14 16 18 20 22 24 26 28 30 0 – 60 –120 –180 –240 –300 0 60 120 180 240 300 SUPPLY VOLTAGE (V) SOURCE CURRENT (mA) SINK CURRENT (mA) 1249 G06 1249 G07 1249 G05
Start-Up Supply Current vs GTDR Rise and Fall Time Supply Voltage Switching Frequency
400 550 140 500 130 450 300 400 120 µA) 350 FALL TIME 110 300 –55°C 200 25°C 250 TIME (ns) 100 RISE TIME 200 125°C FREQUENCY (kHz) 90 100 SUPPLY CURRENT ( 150 100 NOTE: GTDR SLEWS 80 BETWEEN 1V AND 16V 50 0 0 70 0 10 20 30 40 50 0 2 4 6 8 10 12 14 16 18 20 –75 –50 –25 0 25 50 75 100 125 LOAD CAPACITANCE (nF) SUPPLY VOLTAGE (V) TEMPERATURE (°C) 1249 G08 1249 G09 1249 G10 4