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LTC3785EUF-1-PBF Datasheet(PDF) 4 Page - Linear Technology |
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LTC3785EUF-1-PBF Datasheet(HTML) 4 Page - Linear Technology |
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4 / 20 page  LTC3785-1 4 37851f TYPICAL PERFORMANCE CHARACTERISTICS LOAD CURRENT (A) 0.0001 60 80 100 1 37851 G01 40 20 50 70 90 30 10 0 0.001 0.01 0.1 10 VIN = 4.2V VIN = 3.6V VIN = 3V Burst Mode OPERATION FIXED FREQUENCY MOSFET Si7940 L = 4.7μH WURTH WE-PD fOSC = 500kHz LOAD CURRENT (A) 0.0001 0.001 0.01 0.1 1 40 50 60 70 80 10 37851 G02 30 20 10 0 90 100 VIN = 8.4V VIN = 7.2V VIN = 5.4V MOSFET Si7940 L = 5.6μH MSS1260 fOSC = 430kHz Burst Mode OPERATION FIXED FREQUENCY LOAD CURRENT (A) 0.0001 0.001 0.01 0.1 1 40 50 60 70 80 10 37851 G03 30 20 10 0 90 100 VIN = 9V VIN = 4.2V VIN = 3.6V VIN = 2.7V MOSFET Si7940 L = 5.6μH MSS1260 fOSC = 430kHz Burst Mode OPERATION FIXED FREQUENCY VOUT 50mV/DIV AC COUPLED INDUCTOR CURRENT 1A/DIV 5μs/DIV VOUT = 3.3V COUT = 100μF 37851 G04 VOUT 500mV/ DIV VIN 3V TO 8.5V 500μs/DIV ILOAD = 300μA VOUT = 5V COUT = 100μF 37851 G05 VOUT 200mV/ DIV ILOAD 10mA TO 2A 100μs/DIV VIN = 3.6V VOUT = 3.3V COUT = 100μF 37851 G06 TEMPERATURE (°C) –50 1.2255 1.2245 1.2250 1.2240 1.2235 1.2230 1.2225 1.2220 1.2215 1.2210 25 75 37851 G07 –25 0 50 100 TEMPERATURE (°C) –50 –1.0 –0.6 –0.2 0.2 –25 0 25 50 37851 G08 75 0.6 1.0 –0.8 –0.4 0 0.4 0.8 100 RT (kΩ) 20 0 200 400 600 800 1000 1200 40 60 80 100 37851 G09 Burst Mode Ripple Line Transient Response VOUT Load Transient VFB vs Temperature Normalized Oscillator Frequency vs Temperature Oscillator Frequency vs RT Li-Ion to 3.3V Efficiency vs Load Current Two Li-Ion to 7V Efficiency vs Load Current Li-Ion/9V to 5V VOUT Efficiency vs Load Current |
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