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XD9268 Datasheet(PDF) 6 Page - Torex Semiconductor |
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XD9268 Datasheet(HTML) 6 Page - Torex Semiconductor |
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6 / 26 page  6/26 XD9267/XD9268 Series ■ELECTRICAL CHARACTERISTICS XD9267/XD9268 Series Ta=25℃ PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT CIRCUIT FB Voltage VFBE VFB=0.731V→0.769V, VFB Voltage when Lx pin voltage changes from"H" level to "L" level 0.739 0.750 0.761 V ② -40℃≦Ta≦105℃ 0.731 - 0.769 Setting Output Voltage Range (*1) VOUTSET - 1 - 25 V - Operating Input Voltage Range (*1) VIN - 3 - 36 V - UVLO Detect Voltage VUVLOD VEN/SS=12V,VIN:2.87V→2.53V,VFB=0V VIN Voltage which Lx pin voltage holding "H" level 2.6 2.7 2.8 V ② -40℃≦Ta≦105℃ 2.53 - 2.87 UVLO Release Voltage VUVLOR VEN/SS=12V,VIN:2.63V→2.97V,VFB=0V VIN Voltage which Lx pin voltage holding "L" level 2.7 2.8 2.9 V ② -40℃≦Ta≦105℃ 2.63 - 2.97 Quiescent Current Iq VFB=0.825V XD9267 - 290 500 μA ④ -40℃≦Ta≦105℃ - - 550 XD9268 - 13.5 22.0 -40℃≦Ta≦105℃ - - 30 Stand-by Current ISTBY VIN=12V, VEN/SS=VFB=0V - 1.65 2.50 μA ④ -40℃≦Ta≦105℃ - - 3.90 Oscillation Frequency fOSC Connected to external components, IOUT=200mA 2.013 2.200 2.387 MHz ① -40℃≦Ta≦105℃ 1.936 - 2.464 Minimum On Time tONMIN Connected to external components - 85 (*2) - ns ① Minimum Duty Cycle DMIN VFB=0.825V -40℃≦Ta≦105℃ - - 0 % ② Maximum Duty Cycle DMAX VFB=0.675V -40℃≦Ta≦105℃ 100 - - % ② Lx SW "H" On Resistance RLxH VFB=0.675V, ILx=200mA - 1.20 1.38 Ω ⑤ Lx SW "L" On Resistance RLxL - - 0.60 (*2) - Ω ⑤ High side Current Limit (*3) ILIMH VFB=VFBE×0.98 1.00 1.30 - A ⑤ Internal Soft-Start Time tSS1 VFB=0.675V 1.0 2.0 4.0 ms ② External Soft-Start Time tSS2 VFB=0.675V RSS =430KΩ, CSS=0.47μF 21 26 33 ms ③ Test Condition: Unless otherwise stated, VIN=12V, VEN/SS=12V, VPG=OPEN(*4) Peripheral parts connection conditions：L=3.3 μH,RFB1=680kΩ,RFB2=120kΩ,CFB=12pF,CL=10μF×2,CIN=2.2μF (*1) Please use within the range of VOUT/VIN≧tONMIN[ns]×fOSC[MHz]×10-3 (*2)Design reference value. This parameter is provided only for reference. (*3)Current limit denotes the level of detection at peak of coil current. |
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