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MAX771EPA Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX771EPA Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 20 page 0 1 2 3 4 -75 -50 -25 0 25 50 75 100 125 SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE (°C) VOUT = 12V, VIN = 5V CIRCUIT OF FIGURE 2b BOOTSTRAPPED MODE ENTIRE CIRCUIT SCHOTTKY DIODE LEAKAGE EXCLUDED 0 0.2 0.4 0.6 0.8 2 4 6 8 10 12 SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) VOUT = 12V NON-BOOTSTRAPPED CIRCUIT OF FIGURE 2c BOOTSTRAPPED CIRCUIT OF FIGURE 2b 0 100 150 200 250 50 2 4 6 8 10 12 EXT RISE/FALL TIME vs. SUPPLY VOLTAGE V+ (V) CEXT = 2200pF CEXT = 1000pF CEXT = 446pF CEXT = 100pF 100 50 0.001 0.01 0.1 1 MAX772 EFFICIENCY vs. OUTPUT CURRENT (BOOTSTRAPPED) 60 OUTPUT CURRENT (A) 70 80 90 VOUT = 15V, CIRCUIT OF FIGURE 2b MAX772 SUBSTITUTED FOR MAX771 VIN = 12V VIN = 9V VIN = 6V VIN = 5V VIN = 3V 50 60 70 80 90 100 0.001 0.01 1 MAX771 EFFICIENCY vs. OUTPUT CURRENT (BOOTSTRAPPED) OUTPUT CURRENT (A) 0.1 VIN = 6V VIN = 5V VIN = 3V VIN = 9V VOUT = 12V CIRCUIT OF FIGURE 2b 100 50 0.001 0.01 0.1 1 MAX770 EFFICIENCY vs. OUTPUT CURRENT (BOOTSTRAPPED) 60 OUTPUT CURRENT (A) 70 80 90 VIN = 3V VIN = 3.5V VOUT = 5V CIRCUIT OF FIGURE 2a VIN = 4V 5V/12V/15V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controllers 4 _______________________________________________________________________________________ __________________________________________Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) 70 80 90 100 0.001 0.01 0.1 10 1 MAX771 EFFICIENCY vs. OUTPUT CURRENT (NON-BOOTSTRAPPED) OUTPUT CURRENT (A) VIN = 9V VIN = 6V VIN = 5V VOUT = 12V CIRCUIT OF FIGURE 2c 0 100 200 300 400 500 600 700 1.0 MAX770 LOAD CURRENT vs. MINIMUM START-UP INPUT VOLTAGE MINIMUM START-UP INPUT VOLTAGE (V) 3.0 1.5 2.5 3.5 2.0 ABOVE 3.4V, THE CIRCUIT STARTS UP UNDER MAXIMUM LOAD CONDITIONS VOUT = 5V CIRCUIT OF FIGURE 2a 0 100 200 300 400 500 2.0 MAX771 LOAD CURRENT vs. MINIMUM START-UP INPUT VOLTAGE MINIMUM START-UP INPUT VOLTAGE (V) 4.0 2.5 3.5 3.0 ABOVE 3.5V THE CIRCUIT STARTS UP UNDER MAXIMUM LOAD CONDITIONS VOUT = 12V CIRCUIT OF FIGURE 2b |
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