Datasheet LT3798 (Analog Devices) - 4

LT3798
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. EN/UVLO Threshold EN/UVLO Hysteresis Current vs Temperature vs Temperature VIN IQ vs Temperature
1.3 12 100 90 VIN = 24V 1.28 80 11.5 RISING 70 VIN = 12V 1.26 60 11 (µA) 50 I Q EN/UVLO (V) 1.24 FALLING 40 30 10.5 1.22 20 EN/UVLO HYSTERESIS CURRENT (µA) 10 1.2 10 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3798 G01 3798 G02 3798 G03
SENSE Current Limit Threshold VREF vs Temperature VREF vs VIN vs Temperature
2.100 2.05 120 2.075 2.04 MAX ILIM 100 2.03 2.050 2.02 80 2.025 VIN = 24V WITH NO LOAD 2.01 NO LOAD (V) 2.000 (V) 2 60 V REF V REF 1.975 V 1.99 IN = 24V WITH 200µA LOAD 200µA LOAD 40 1.98 CURRENT LIMIT (mA) 1.950 1.97 20 MIN ILIM VIN_SENSE = 34µA 1.925 1.96 MIN ILIM VIN_SENSE = 21µA 1.900 1.95 0 –50 –25 0 25 50 75 100 125 150 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3798 G05 3798 G05 3798 G06
Maximum Oscillator Frequency Minimum Oscillator Frequency Backup Oscillator Frequency vs Temperature vs Temperature vs Temperature
220 5 25 4 20 195 VFB < VOVP 3 15 170 2 10 FREQUENCY (kHz) FREQUENCY (kHz) FREQUENCY (kHz) 145 1 5 VOVP > VFB 120 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3798 G06a 3799 G07 3798 G07a 3798fa 4 Document Outline Description Features Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts