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R1218N032A Datasheet(PDF) 5 Page - RICOH electronics devices division |
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R1218N032A Datasheet(HTML) 5 Page - RICOH electronics devices division |
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5 / 21 page  R1218x 5 ELECTRICAL CHARACTERISTICS • R1218xxxxA Topt=25 °C Symbol Item Conditions Min. Typ. Max. Unit VIN Operating Input Voltage 1.8 5.5 V IDD Supply Current VIN =5.5V, VFB=0V, Lx at no load 0.5 1.0 mA Istandby Standby Current VIN =5.5V, VCE=0V 0 3.0 µA VUVLO1 UVLO Detector Threshold VIN falling 1.5 1.6 1.7 V VUVLO2 UVLO Released Voltage VIN rising VUVLO1 +0.1 1.8 V VCEH CE Input Voltage "H" VIN =5.5V 1.5 V VCEL CE Input Voltage "L" VIN =1.8V 0.5 V RCE CE Pull Down Resistance VIN =3.6V 600 1200 2200 k Ω tshtdn CE Shutdown Delay Time VIN =3.6V 10 ms VFB VFB Voltage VIN =3.6V 0.19 0.20 0.21 V ∆VFB/ ∆Topt VFB Voltage Temperature Coefficient VIN =3.6V, −40°C < = Topt < = 85°C ±150 ppm /°C IFB VFB Input Current VIN =5.5V, VFB=0V or 5.5V −0.1 0.1 µA RON Switch On Resistance VIN =3.6V, ISW=100mA 1.5 Ω R1218xxx1A VLX =20V 0 3.0 µA ILXleak Switch Leakage Current R1218xxx2A VLX =29V 0 3.0 µA ILXlim Switch Current Limit VIN =3.6V 400 700 1000 mA Vf Diode Forward Voltage R1218xxx1A IDIODE =100mA 0.8 V IDIODEleak Diode Leakage Current R1218xxx1A VOUT =20V, VLX=0V 10 µA fosc Oscillator Frequency VIN =3.6V, VOUT=VFB=0V 1.0 1.2 1.4 MHz Maxduty Maximum Duty Cycle VIN =3.6V, VOUT=VFB=0V 86 91 % R1218x021A 8.5 9.5 10.5 R1218x031A 13.0 14.0 15.0 R1218x041A 17.0 18.5 20.0 R1218x052A 21.5 23.0 24.5 VOVP1 OVP Detector Threshold VIN =3.6V, VOUT rising R1218x062A 26.0 27.5 29.0 V R1218x021A VOVP1 −0.5 R1218x031A VOVP1 −0.75 R1218x041A VOVP1 −1.0 R1218x052A VOVP1 −1.25 VOVP2 OVP Released Voltage VIN =3.6V, VOUT falling R1218x062A VOVP1 −1.5 V |
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