Datasheet LT3756, LT3756-1, LT3756-2 (Analog Devices) - 7

LT3756/LT3756-1/LT3756-2
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. SENSE Current Limit Threshold SHDN/UVLO Threshold Quiescent Current vs VIN vs Temperature vs Temperature
2.0 110 1.28 PWM = 0V 1.26 1.5 105 SHDN/UVLO RISING 1.24 1.0 100 1.22 SHDN/UVLO FALLING CURRENT (mA) /UVLO VOLTAGE (V) V IN 0.5 SENSE THRESHOLD (mV) 95 SHDN 1.20 0 90 1.18 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 375612 G10 375612 G11 375612 G12
INTVCC Current Limit INTVCC Voltage vs VIN vs Temperature INTVCC Voltage vs Temperature
8 20 7.4 18 6 7.3 16 (V) (V) 4 CC 7.2 V INTVCC 14 INTV CURRENT LIMIT (mA) CC 2 7.1 INTV 12 0 10 7.0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 375612 G13 375612 G14 375612 G15
SENSE Current Limit Threshold Gate Rise/Fall Time vs Duty Cycle V(ISP-ISN) Threshold vs FB Voltage vs Capacitance
110 125 100 VCTRL = 2V 10% TO 90% 100 80 105 GATE RISE TIME 75 60 100 THRESHOLD (mV) GATE 50 TIME (ns) 40 FALL TIME SENSE THRESHOLD (mV) 95 V (ISP – ISN) 25 20 90 0 0 0 25 50 75 100 1.2 1.22 1.24 1.26 1.28 0 2 4 6 8 10 DUTY CYCLE (%) FB VOLTAGE (V) CAPACITANCE (nF) 375612 G16 375612 G17 375612 G18 Rev. C For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts