Datasheet LT8331 (Analog Devices) - 4

LT8331
TYPICAL PERFORMANCE CHARACTERISTICS FBX Positive Regulation Voltage FBX Negative Regulation Voltage EN/UVLO Pin Thresholds vs Temperature vs Temperature vs Temperature
1.630 –0.785 1.84 VIN = 12V VIN = 12V VIN = 12V 1.81 1.620 –0.790 1.78 1.75 1.610 –0.795 TAGE (V) EN/UVLO RISING (TURN-ON) 1.72 TAGE (V) 1.600 TAGE (V) –0.800 1.69 1.66 FBX VOL 1.590 FBX VOL –0.805 1.63 EN/UVLO PIN VOL 1.60 1.580 –0.810 EN/UVLO FALLING (TURN-OFF) 1.57 1.570 –0.815 1.54 –50 –25 0 25 50 75 100 125 150 175 –50 –25 0 25 50 75 100 125 150 175 –50 –25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 8331 G01 8331 G02 8331 G03
Switching Frequency Normalized Switching Frequency vs Temperature Switching Frequency vs VIN vs FBX Voltage
525 525 125 VIN = 12V VIN = 12V 520 520 515 515 100 510 510 505 505 75 500 500 495 495 50 490 490 SWITCHING FREQUENCY (kHz) 485 SWITCHING FREQUENCY (kHz) 485 25 480 480 NORMALIZED SWITCHING FREQUENCY (%) 475 475 0 –50 –25 0 25 50 75 100 125 150 175 0 10 20 30 40 50 60 70 80 90 100 –0.8 –0.4 0.0 0.4 0.8 1.2 1.6 JUNCTION TEMPERATURE (°C) VIN (V) FBX VOLTAGE (V) 8331 G04 8331 G05 8331 G06
Switch Current Limit vs Switch Minimum On-Time Switch Minimum Off-Time Duty Cycle vs Temperature vs Temperature
0.70 200 180 VIN = 12V 190 170 0.65 180 160 170 SYNC = 0V 150 0.60 160 140 SYNC = INTVCC 150 130 0.55 MINIMUM ON–TIME (ns) SWITCH CURRENT LIMIT (A) MINIMUM OFF–TIME (ns) 140 120 0.50 130 110 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 175 –50 –25 0 25 50 75 100 125 150 175 DUTY CYCLE (%) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 8331 G07 8331 G08 8331 G09 Rev. C 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts