Datasheet LT3745 (Analog Devices) - 9

LT3745
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Oscillator Frequency fOSC FB Regulation Voltage LED Regulation Voltage vs Temperature vs Load Current vs Load Current
520 1.216 0.72 1.214 0.70 510 1.212 0.68 (kHz) (V) 500 (V) 1.210 0.66 f OSC V FB V LED 1.208 0.64 490 1.206 0.62 480 1.204 0.60 –50 –25 0 25 50 75 100 125 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 JUNCTION TEMPERATURE (°C) LOAD CURRENT (mA) LOAD CURRENT (mA) 3745 G19 3745 G20 3745 G21
Soft-Start Charge Current ISS CAP Bias Voltage (VIN - VCAP) vs Temperature Current Sense Threshold vs VISN vs VIN
–10.0 60 6.90 –10.2 55 6.86 T = 125°C –10.4 (mV) 50 (V) 6.82 T = 25°C (µA) ISN T = –40°C CAP I SS – V -V T = 25°C –10.6 45 T = 125°C IN 6.78 V ISP V –10.8 40 6.74 T = –40°C –11.0 35 6.70 –50 –25 0 25 50 75 100 125 0 10 20 30 40 0 10 20 30 40 50 60 JUNCTION TEMPERATURE (°C) VISN (V) VIN (V) 3745 G22 3745 G23 3745 G24
CAP Bias Voltage (VIN - VCAP) vs ICAP VISET Pin Voltage vs Temperature
6.90 1.210 6.80 T = 25°C 1.208 6.70 T = –40°C (V) 6.60 1.206 (V) CAP-V T = 125°C ISET IN 6.50 V V 1.204 6.40 1.202 6.30 6.20 1.200 0 4 8 12 16 20 24 –50 –25 0 25 50 75 100 125 ICAP (mA) JUNCTION TEMPERATURE (°C) 3745 G25 3745 G26 3745f 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts