Datasheet LT3758, LT3758A (Analog Devices) - 7

LT3758/LT3758A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. INTVCC Minimum Output INTVCC vs Temperature Current vs VIN INTVCC Load Regulation
7.4 45 7.3 TJ = 150°C VIN = 8V 40 7.2 7.3 35 30 7.1 (V) 25 CC 7.2 INTVCC = 4.7V 20 VOLTAGE (V) INTV CURRENT (mA) CC 7 CC 15 INTV 7.1 INTV 10 INTV 6.9 CC = 6V 5 7.0 0 6.8 –75 –50 –25 0 25 50 75 100 125 150 1 10 100 0 5 10 15 20 25 TEMPERATURE (°C) VIN (V) INTVCC LOAD (mA) 3758 G13 3758 G14 3758 G15
INTVCC Dropout Voltage Gate Drive Rise INTVCC Line Regulation vs Current, Temperature and Fall Time vs CL
7.30 1000 90 VIN = 6V 150°C INTVCC = 7.2V 900 80 800 7.25 125°C 70 700 75°C 60 600 RISE TIME FALL TIME TAGE (V) TAGE (mV) 50 7.20 25°C 500 VOL TIME (ns) 40 V CC 400 0°C INT 300 30 7.15 DROPOUT VOL 200 –55°C 20 100 10 7.10 0 0 0 10 20 30 40 50 60 70 80 90 100 0 2 4 6 8 10 0 5 10 15 20 25 30 VIN (V) INTVCC LOAD (mA) CL (nF) 3758 G16 3758 G17 3758 G18
Gate Drive Rise FBX Frequency Foldback and Fall Time vs INTVCC Typical Start-Up Waveforms Waveforms During Overcurrent
30 CL = 3300pF VIN = 48V VIN = 48V V 25 OUT RISE TIME 20V/DIV 20 V FALL TIME OUT VSW 10V/DIV 50V/DIV 15 TIME (ns) 10 IL1A + IL1B I 1A/DIV L1A + IL1B 2A/DIV 5 3758 G20 2ms/DIV 3758 G21 50µs/DIV SEE TYPICAL APPLICATION: 18V TO 72V INPUT, 0 SEE TYPICAL APPLICATION: 18V TO 72V INPUT, 24V OUTPUT SEPIC CONVERTER 3 6 9 12 15 24V OUTPUT SEPIC CONVERTER INTVCC (V) 3758 G19 Rev F For more information www.analog.com 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts Typical Applications Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts