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LTC3853EUJ Datasheet(PDF) 6 Page - Linear Technology |
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LTC3853EUJ Datasheet(HTML) 6 Page - Linear Technology |
6 / 36 page LTC3853 6 3853f TYPICAL PERFORMANCE CHARACTERISTICS Coincident Tracking Prebiased Output at 2V Maximum Current Sense Voltage vs Feedback Voltage (Current Foldback) Quiescent Current vs Input Voltage Without EXTVCC Internal VCC Line Regulation Current Sense Threshold vs ITH Voltage Maximum Current Sense Threshold vs Common Mode Voltage Maximum Current Sense Threshold vs Duty Cycle Tracking Up and Down with External Ramp 50ms/DIV VOUT 1V/DIV VTK/SS 500mV/DIV VFB 500mV/DIV 3853 G08 10ms/DIV VIN = 12V VOUT1 = 3.3V VOUT2 = 2.5V VOUT3 = 1.8V RUN1 2V/DIV VOUT1,2,3 1V/DIV 3853 G09 5ms/DIV VIN = 12V VOUT1 = 3.3V VOUT2 = 2.5V VOUT3 = 1.8V TK/SS1 TK/SS2 TK/SS3 2V/DIV VOUT1,2,3 1V/DIV 3853 G10 INPUT VOLTAGE (V) 5 5.0 5.5 25 3853 G11 4.5 4.0 10 15 20 6.0 INPUT VOLTAGE (V) 0 4.75 5.00 5.25 20 3853 G12 4.50 4.25 510 15 25 4.00 3.75 3.50 VITH (V) 0 –40 –20 0 20 40 60 80 0.5 1 1.5 2 3853 G13 ILIM = INTVCC ILIM = GND ILIM = FLOAT VSENSE COMMON MODE VOLTAGE (V) 0 30 40 50 3 5 20 10 0 12 4 60 70 80 3853 G14 ILIM = INTVCC ILIM = GND ILIM = FLOAT 60 80 100 40 20 50 70 90 30 10 0 DUTY CYCLE (%) 0 60 100 20 40 80 3853 G15 ILIM = INTVCC ILIM = GND ILIM = FLOAT FEEDBACK VOLTAGE (V) 0 40 50 60 0.8 3853 G16 30 20 0 0.2 0.4 0.6 0.1 0.9 0.3 0.5 0.7 10 80 70 ILIM = INTVCC ILIM = FLOAT ILIM = GND |
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