Datasheet LT3992 (Analog Devices) - 5

LT3992
Typical perForMance characTerisTics Shutdown Threshold and Minimum Shutdown Quiescent Current FB Voltage and CH1-CH2 FB Input Voltage vs Temperature vs Temperature Offset vs Temperature
3.5 10 820 8 9 3.0 MINIMUM 6 INPUT VOLTAGE 8 OFFSET VOLTAGE (mV) 815 4 2.5 7 IQ1 2 6 2.0 OFFSET SHUTDOWN 5 810 0 1.5 THRESHOLD VOLTAGE VOLTAGE (V) 4 CURRENT (µA) –2 CH2 1.0 3 FEEDBACK VOLTAGE (mV) 805 –4 2 CH1 0.5 1 –6 IQ2 0 0 800 –8 –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) 3992 G01 3992 G02 3992 G03
Error Amplifier Transconductance Soft-Start-to-Feedback Offset TJ Output Voltage vs Temperature vs Temperature vs Temperature
1.50 415 4 V 400 SS = 0.4V 1.25 3 385 1.00 370 2 0.75 355 1 340 TAGE (V) 0.50 325 TAGE (mV) 0 VOL 0.25 RTJ = 30k 310 VOL –1 TO GND 0 295 –2 TRANSCONDUCTANCE (µMho) 280 –0.25 RTJ = 30k TO –1V –3 265 –0.50 250 –4 –50 –25 0 25 50 75 100 125 150 –50 –30 –10 10 30 50 70 90 110 130 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3992 G04 3992 G05 3992 G06
Comparator Thresholds Comparator Sink Current Switching Frequency vs Temperature vs Temperature vs Temperature
730 400 1800 SINK CURRENT AT VCMPO = 0.4V 720 RISING THRESHOLD 350 1600 RRT/SYNC = 44.2k 710 300 1400 700 1200 690 250 RRT/SYNC = 28.0k 1000 680 200 800 670 VOLTAGE (mV) CURRENT (µA) 150 FREQUENCY (kHz) 660 600 RRT/SYNC = 13.0k 100 650 400 FALLING THRESHOLD 640 50 200 RRT/SYNC = 0k 630 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) 3992 G07 3992 G08 3992 G09 3992fa For more information www.linear.com/LT3992 5 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 Typical Application Related Parts