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XC9236G13CMR Datasheet(PDF) 9 Page - Torex Semiconductor |
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XC9236G13CMR Datasheet(HTML) 9 Page - Torex Semiconductor |
9 / 33 page 9/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) ●XC9237D(F)08Cxx, FB Type, fOSC=1.2MHz, Ta=25℃ PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT CIRCUIT FB Voltage VFB VIN = VCE =5.0V, The VFB at Lx=”High" (*11) while decreasing FB pin voltage from 0.9V. 0.784 0.800 0.816 V ③ Operating Voltage Range VIN 1.8 - 6.0 V ① Maximum Output Current IOUTMAX VIN=3.2V, VCE=1.0V When connected to external components (*9) 600 - - mA ① UVLO Voltage VUVLO VCE = VIN , VFB = 0.4V, Voltage which Lx pin holding “L” level (*1,*11) 1.00 1.40 1.78 V ③ Supply Current IDD VIN =VCE=5.0V, VFB= 0.88V - 15 μA ② Stand-by Current ISTB VIN =5.0V, VCE=0V, VFB= 0.88V - 0 1.0 μA ② Oscillation Frequency fOSC When connected to external components, VIN = 3.2V, VCE=1.0V, IOUT=100mA 1020 1200 1380 kHz ① PFM Switching Current IPFM When connected to external components, VIN =3.2V, VCE = VIN , IOUT=1mA (*12) 120 160 200 mA ① PFM Duty Limit DTYLIMIT_PFM VCE= VIN =2.0V IOUT=1mA (*12) 200 % ① Maximum Duty Cycle DTYMAX VIN = VCE =5.0V, VFB = 0.72V 100 - - % ③ Minimum Duty Cycle DTYMIN VIN = VCE =5.0V, VFB = 0.88V - - 0 % ③ Efficiency (*2) EFFI When connected to external components, VCE = VIN = 2.4V, IOUT = 100mA - 92 - % ① Lx SW "H" ON Resistance 1 RL xH VIN = VCE = 5.0V, VFB = 0.72V,ILX = 100mA (*3) - 0.35 0.55 Ω ④ Lx SW "H" ON Resistance 2 RL xH VIN = VCE = 3.6V, VFB = 0.72V,ILX = 100mA (*3) - 0.42 0.67 Ω ④ Lx SW "L" ON Resistance 1 RL xL VIN = VCE = 5.0V (*4) - 0.45 0.66 Ω - Lx SW "L" ON Resistance 2 RL xL VIN = VCE = 3.6V (*4) - 0.52 0.77 Ω - Lx SW "H" Leak Current (*5) ILeakH VIN = VFB = 5.0V, VCE = 0V, LX= 0V - 0.01 1.0 μA ⑨ Current Limit (*10) ILIM VIN = VCE= 5.0V, VFB = 0.72V (*8) 900 1050 1350 mA ⑥ Output Voltage Temperature Characteristics △VOUT/ (VOUT・△Topr) IOUT =30mA -40℃≦Topr≦85℃ - ±100 - ppm/ ℃ ① CE "H" Voltage VCEH VFB =0.72V, Applied voltage to VCE, Voltage changes Lx to “H” level (*11) 0.65 - 6.0 V ③ CE "L" Voltage VCEL VFB =0.72V, Applied voltage to VCE, Voltage changes Lx to “L” level (*11) VSS - 0.25 V ③ PWM "H" Level Voltage VPWMH When connected to external components, IOUT=1mA (*6), Voltage which oscillation frequency becomes 1020kHz≦fOSC≦1380kHz (*13) - - VIN - 1.0 V ① PWM "L" Level Voltage VPWML When connected to external components, IOUT=1mA (*6), Voltage which oscillation frequency becomes fOSC<1020kHz (*13) VIN - 0.25 - - V ① CE "H" Current ICEH VIN = VCE =5.0V, VFB =0.72V - 0.1 - 0.1 μA ⑤ CE "L" Current ICEL VIN =5.0V, VCE = 0V, VFB =0.72V - 0.1 - 0.1 μA ⑤ Soft Start Time (D series) 0.5 1.0 2.5 Soft Start Time (F series) tSS When connected to external components, VCE = 0V → VIN , IOUT=1mA - 0.25 0.40 ms ① Latch Time tLAT VIN=VCE=5.0V, VFB=0.64, Short Lx at 1Ω resistance (*7) 1.0 - 20.0 ms ⑦ Short Protection Threshold Voltage VSHORT VIN = VCE =5.0V, The VFB at Lx=”Low" (*11) while decreasing FB pin voltage from 0.4V. 0.15 0.200 0.25 V ⑦ CL Discharge RDCHG VIN = 5.0V ,LX = 5.0V, VCE = 0V, VFB= open 200 300 450 Ω ⑧ Test conditions: VOUT=1.2V when the external components are connected. Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage, applied voltage sequence is VOUT→VIN→VCE NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VFB with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. |
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