Datasheet LT3470 (Analog Devices) - 4

LT3470
Typical perForMance characTerisTics Efficiency, VOUT = 3.3V Efficiency, VOUT = 5V VFB vs Temperature
90 90 1.260 L = TOKO D52LC 47µH L = TOKO D52LC 47µH TA = 25°C VIN = 7V TA = 25°C 80 VIN = 12V 80 VIN = 12V 1.255 70 70 VIN = 36V V V V IN = 24V IN = 36V IN = 24V 60 60 (V) 1.250 V FB EFFICIENCY (%) 50 EFFICIENCY (%) 50 1.245 40 40 30 30 1.240 0.1 1 10 100 0.1 1 10 100 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3470 G01 3470 G02 3470 G03
Top and Bottom Switch Current VIN Quiescent Current BIAS Quiescent Current Limits (VFB = 0V) vs Temperature vs Temperature (Bias > 3V) vs Temperature
400 50 30 350 25 40 300 BIAS < 3V 20 250 30 200 15 150 CURRENT (µA) 20 10 CURRENT LIMIT (mA) V IN BIAS CURRENT (µA) 100 BIAS > 3V 10 5 50 0 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3470 G04 3470 G05 3470 G06
SHDN Bias Current FB Bias Current (VFB = 1V) vs Temperature vs Temperature
9 60 8 VSHDN = 36V 50 7 6 40 5 30 CURRENT (µA) 4 3 FB CURRENT (nA) 20 SHDN 2 VSHDN = 2.5V 10 1 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 3470 G07 3470 G08 3470fd 4 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 Revision History Related Parts