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UC3550L-XX-AF5-R Folha de dados(PDF) 4 Page - Unisonic Technologies |
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4 / 11 page UC3550 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 4 of 11 www.unisonic.com.tw QW-R502-082,D ELECTRICAL CHARACTERISTICS (Cont.) UC3550-3.6V PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT OSCILLATOR Frequency fOSC VOUT=VSET×0.96 240 300 360 kHz Frequency Temperature Coefficient f △ TA=-40°C ~ 85°C 0.10 %/°C Maximum PWM Duty Cycle DMAX VOUT=VSET×0.96 70 80 90 % Minimum Start-up Voltage VSTART1 IOUT=0mA 800 900 mV Minimum Start-up Voltage VSTART2 IOUT=1mA 900 1000 mV Minimum Start-up Voltage Temperature Coefficient V △ START TA=-40°C ~ 85°C -1.6 mV/°C Minimum Operation Hold Voltage VOPR IOUT=0mA 600 700 mV Soft-Start Time tSS VOUT=VSET 60 250 ms CE (PIN 1) CE Input Voltage : High State, Device Enabled VCEH VOUT=VSET×0.96 900 mV Low State, Device Disabled VCEL 680 mV CE Input Current : High State, Device Enabled ICEH VOUT=VCE=5.0V -0.5 0 0.5 μA Low State, Device Disabled ICEL VOUT=5.0V, VCE=0V 0 0.15 0.5 μA EXT (PIN 5) ON Resistance EXT “H” REXTH VEXT=VOUT-0.4V 11 15 Ω EXT “L” REXTL VEXT=0.4V 8 12 Ω TOTAL DEVICE Output Voltage VOUT 3.51 3.6 3.69 V Output Voltage temperature coefficient V △ OUT TA=-40 ~ 85°C 150 ppm/°C Operating Current IDD VOUT=VCE=VSET×0.96 103 160 μA Stand-by Current ISTN-BY VOUT=VCE=VSET+0.5V 15 38 μA Off-State Current IOFF VOUT=5.0V, VCE=0V, TA=-40 ~ +85°C 0.6 1.5 μA Efficiency η IOUT = 200mA, VIN = 2.0V 80 88 % |
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