Datasheet LT3761, LT3761-1 (Analog Devices) - 5

LT3761/LT3761-1
Typical perFormance characTerisTics TA = 25°C, unless otherwise noted. VISP-ISN Threshold VISP-ISN Threshold Full-Scale VISP-ISN Threshold vs CTRL Voltage vs ISP Voltage vs Temperature
300 260 260 FB < 1.2V FB < 1.2V CTRL = 2V 258 250 255 256 200 ISN = 0 254 150 (mV) 250 252 ISN 100 P- THRESHOLD (mV) THRESHOLD (mV) V IS 250 ISN P- ISP = 48V 50 245 248 V IS V ISP-ISN 0 246 –50 240 244 0 0.5 1 1.5 2 0 20 40 60 80 –50 –25 0 25 50 75 100 125 150 CTRL VOLTAGE (V) ISP VOLTAGE (V) TEMPERATURE (°C) 37611 G01 37611 G02 37611 G03
FB Regulation Voltage (VFB) VREF Source Current vs Temperature VISP-ISN Threshold vs FB Voltage vs Temperature
1.270 300 200 CTRL > 0.1V CTRL = 2V 1.265 250 190 1.260 200 180 (V) (mV) 1.255 150 V FB CTRL = 0.5V 170 1.250 V ISP-ISN 100 SOURCE CURRENT (µA) 1.245 50 V REF 160 1.240 0 150 –50 –25 0 25 50 75 100 125 150 1.20 1.21 1.22 1.23 1.24 1.25 1.26 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) FB VOLTAGE (V) TEMPERATURE (°C) 37611 G04 37611 G05 37611 G06
Switching Frequency VREF Voltage vs Temperature Switching Frequency vs RT vs Temperature
2.06 1000 420 RT = 25.5k 2.05 900 415 2.04 800 410 700 2.03 405 600 (V) 2.02 400 V REF 500 2.01 395 400 FREQUENCY (kHz) 2.00 300 390 SWITCHING FREQUENCY (kHz) 1.99 200 385 1.98 100 380 –50 –25 0 25 50 75 100 125 150 10 100 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) RT (kΩ) TEMPERATURE (°C) 37611 G07 37611 G09 37611 G08 37611fb For more information www.linear.com/LT3761 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts