Datasheet LT3693 (Analog Devices) - 4

LT3693
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted. Effi ciency Effi ciency Effi ciency
100 100 100 3.0 VIN = 12V 90 90 VIN = 12V 90 2.5 TOTAL POWER LOSS (W) VIN = 34V 80 V V IN = 24V 80 IN = 34V 80 2.0 VIN = 24V 70 70 70 1.5 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) V 60 IN = 12V V 60 60 1.0 OUT = 5V VOUT = 3.3V VOUT = 5V L = 4.7μH L = 3.3μH L = 4.7μH f = 600kHz f = 600kHz f = 600kHz 50 50 50 0.5 0 0.5 1 1.5 2 2.5 3 3.5 0 0.5 1 1.5 2 2.5 3 3.5 0 0.5 1 1.5 2 2.5 3 3.5 OUTPUT CURRENT (A) OUTPUT CURRENT (A) OUTPUT CURRENT (A) 3693 G01 3693 G02 3693 G03
Maximum Load Current Maximum Load Current Switch Current Limit
5.5 5.5 6.0 TYPICAL 5.0 TYPICAL 5.5 5.0 4.5 5.0 MINIMUM 4.5 4.0 MINIMUM 4.5 4.0 3.5 LOAD CURRENT (A) 4.0 LOAD CURRENT (A) VOUT = 3.3V VOUT = 5V SWITCH CURRENT LIMIT(A) 3.5 3.0 TA = 25°C TA = 25°C 3.5 L = 4.7μH L = 4.7μH f = 600kHz f = 600kHz 2.5 3.0 3.0 5 10 15 20 25 30 5 10 15 20 25 30 0 20 40 60 80 100 INPUT VOLTAGE (V) INPUT VOLTAGE (V) DUTY CYCLE (%) 3693 G06 3693 G07 3693 G08
Switch Current Limit Switch Voltage Drop Boost Pin Current
6.5 700 120 6.0 600 105 5.5 DUTY CYCLE = 10 % 90 500 5.0 75 DUTY CYCLE = 90 % 4.5 400 60 4.0 300 45 3.5 VOLTAGE DROP (mV) 200 SWITCH CURRENT LIMIT (A) 3.0 BOOST PIN CURRENT (mA) 30 100 2.5 15 2.0 0 0 –50 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 0 1 2 3 4 5 TEMPERATURE (°C) SWITCH CURRENT (A) SWITCH CURRENT (A) 3693 G09 3693 G10 3693 G11 3693f 4