Datasheet LT3653 (Analog Devices) - 4

LT3653
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Switch Voltage Drop Switching Frequency Undervoltage Lockout
400 1.7 8.0 125ºC 350 1.6 7.5 25ºC RISING 300 7.0 1.5 250 6.5 –45ºC 1.4 TAGE (V) FALLING 200 6.0 TAGE DROP (mV) 1.3 150 5.5 1.2 INPUT VOL 100 5.0 SWITCH VOL SWITCHING FREQUENCY (MHz) 50 1.1 4.5 0 1.0 4.0 0 0.2 0.4 0.6 0.8 1 1.2 –50 -25 0 25 50 75 100 125 –50 -25 0 25 50 75 100 125 150 SWITCH CURRENT (A) TEMPERATURE (ºC) TEMPERATURE (ºC) 3653 G01 3653 G02 3653 G03
Output Current Limit Output Current Limit VIN Overvoltage Lockout
1.2 6 RILIM = 33.2k RILIM = 27.4k 35 1.15 5 RISING 1.1 33 4 FALLING 1.05 TAGE (V) TAGE (V) 31 1 3 0.95 29 2 CURRENT LIMIT (A) INPUT VOL OUTPUT VOL 0.9 1 27 0.85 0.8 0 25 –50 –25 0 25 50 75 100 125 0 0.2 0.4 0.6 0.8 1 1.2 1.4 –50 –25 0 25 50 75 100 125 TEMPERATURE (ºC) OUTPUT CURRENT (A) TEMPERATURE (ºC) 3653 G04 3653 G05 3653 G06
BOOST Pin Current Boost Diode VF
35 1.4 30 1.2 25 1 (V) F 20 0.8 15 0.6 10 BOOST DIODE V 0.4 BOOST PIN CURRENT (mA) 5 0.2 0 0 0 0.2 0.4 0.5 0.8 1 1.2 0 50 100 150 200 250 300 SWITCH CURRENT (A) DIODE CURRENT (mA) 3653 G07 3653 G08 3653f 4