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R1280D002C Datasheet(PDF) 6 Page - RICOH electronics devices division |
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R1280D002C Datasheet(HTML) 6 Page - RICOH electronics devices division |
6 / 26 page Rev.1.10 - 6 - q R1280D002B (Topt=25 °C) Symbol Item Conditions MIN. TYP. MAX. Unit VIN Operating Input Voltage 2.5 5.5 V VREFOUT VREFOUT Voltage Tolerance VIN=3.3V, IOUT=1mA 1.478 1.500 1.522 V IROUT VREFOUT Output Current VIN=3.3V 20 mA ∆VREFOUT / ∆VIN VREFOUT Line Regulation 2.5V ≤ VIN ≤ 5.5V 26 mV ∆VREFOUT / ∆IOUT VREFOUT Load Regulation 1mA ≤ IROUT ≤ 10mA VIN=3.3V 612 mV ILIM VREFOUT Short Current Limit VIN=3.3V, VREFOUT=0V 25 mA ∆VREFOUT / ∆T VREFOUT Voltage Temperature Coefficient -40 °C≤ Topt ≤ 85°C ±150 ppm/ °C VFB1 VFB1 Voltage VIN=3.3V 0.985 1.000 1.015 V ∆VFB1/ ∆T VFB1 Voltage Temperature Coefficient -40 °C≤ Topt ≤ 85°C ±150 ppm/ °C IFB1,2 IFB1,2 Input Current VIN=5.5V,VFB1 or VFB2=0V or 5.5V -0.1 0.1 µA fOSC Oscillator Frequency EXT1,2 Pins at no load, VIN=3.3V 595 700 805 kHz IDD1 Supply Current VIN=5.5V, EXT1,2 pins at no load 1.4 3.0 mA Maxdty Maximum Duty Cycle VIN=3.3V, CDTC1,2=1000pF 84 90 95 % REXTH1 EXT1 “H” ON Resistance VIN=3.3V, IEXT=-20mA 4.0 8.0 Ω REXTL1 EXT1 “L” ON Resistance VIN=3.3V, IEXT=20mA 2.7 5.0 Ω REXTH2 EXT2 “H” ON Resistance VIN=3.3V, IEXT=-20mA 4.0 8.0 Ω REXTL2 EXT2 “L” ON Resistance VIN=3.3V, IEXT=20mA 3.7 8.0 Ω TDLY Delay Time for Protection VIN=3.3V, VFB1=1.1V →0V 60 100 140 ms Tss1 Soft Start Time1 for Ch1 VIN=3.3V, CDTC1=0.33 µF 10 ms Tss2 Soft Start Time2 for Ch2 VIN=3.3V, CDTC2=0.33 µF 15 ms VCEH CE “H” Input Voltage VIN=5.5V 1.5 V VCEL CE “L” Input Voltage VIN=2.5V 0.3 V VUVLOD UVLO Detector Threshold 2.10 2.20 2.35 V VUVLO UVLO Released Voltage VUVLOD +0.10 2.45 V ICEH CE “H” Input Current VIN= VCE =5.5V -0.1 0.1 µA ICEL CE “L” Input Current VIN=5.5V, VCE=0.0V -0.1 0.1 µA ISTB Standby Current VIN=5.5V, VCE=0.0V 0 2 µA VOFF2 Input Offset Voltage of Ch2. VIN=3.3V -12 12 mV |
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