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UC1878N Datasheet(PDF) 3 Page - Texas Instruments |
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UC1878N Datasheet(HTML) 3 Page - Texas Instruments |
3 / 19 page 3 UC1875/6/7/8 UC2875/6/7/8 UC3875/6/7/8 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, –55°C < TA < 125°C for the UC1875/6/7/8, –25°C < TA < 85°C for the UC2875/6/7/8 and 0°C < TA < 70°C for the UC3875/6/7/8, VC = VIN = 12V, RFREQSET = 12kΩ,CFREQSET = 330pF, RSLOPE = 12kΩ,CRAMP = 200pF, CDELAYSET A-B =CDELAYSET C-D = 0.01µF, IDELAYSET A-B =IDELAYSET C-D = –500µA, TA =TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Undervoltage Lockout Start Threshold UC1875/UC1877 10.75 11.75 V UC1876/UC1878 15.25 V UVLO Hysteresis UC1875/UC1877 0.5 1.25 2.0 V UC1876/UC1878 6.0 V Supply Current IIN Startup VIN = 8V, VC = 20V, RSLOPE open, IDELAY = 0 150 600 µA IC Startup VIN = 8V, VC = 20V, RSLOPE open, IDELAY = 0 10 100 µA IIN 30 44 mA IC 15 30 mA Voltage Reference Output Voltage TJ = +25°C 4.92 5 5.08 V Line Regulation 11 < VIN < 20V 1 10 mV Load Regulation IVREF = –10mA 5 20 mV Total Variation Line, Load, Temperature 4.9 5.1 V Noise Voltage 10Hz to 10kHz 50 µVrms Long Term Stability TJ = 125°C, 1000 hours 2.5 mV Short Circuit Current VREF = 0V, TJ = 25°C 60 mA PLCC-28 (Top View) QP Package |
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