Datasheet LT3761A (Analog Devices) - 5

LT3761A
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 < 1.18V CTRL = 2V 250 258 255 256 200 ISN = 0 254 150 (mV) 250 252 ISN THRESHOLD (mV) 100 P- THRESHOLD (mV) V IS 250 ISN P- 50 ISP = 48V V IS 245 248 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) 3761A G01 3761A G02 3761A G03
FB Regulation Voltage (VFB) VREF Source Current vs Temperature VISP-ISN Threshold vs FB Voltage vs Temperature
1.270 300 200 CTRL = 2V 1.265 250 190 1.260 200 180 (V) 1.255 (mV) 150 V FB 170 CTRL = 0.5V 1.250 V ISP-ISN 100 SOURCE CURRENT (µA) 160 1.245 V REF 50 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) 3761A G04 3761A G05 3761A 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) 2.00 390 300 SWITCHING FREQUENCY (kHz) 1.99 385 200 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) 3761A G07 3761A G09 3761A G08 3761af For more information www.linear.com/LT3761A 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 Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts