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LTC4263CS Datasheet(PDF) 3 Page - Linear Technology |
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LTC4263CS Datasheet(HTML) 3 Page - Linear Technology |
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3 / 24 page  LTC4263 3 4263fe ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD48 – VSS = 48V and VDD5 not driven externally. All voltages are relative to VSS unless otherwise noted. (Notes 2, 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOVLO_OFF OVLO Turn-Off Voltage VDD48 – VSS Increasing l 66 70 74 V VOVLO_HYS OVLO Hysteresis l 0.2 2 V VDD5 VDD5 Supply Voltage Driven Externally l 4.5 5 5.5 V VDD5 Internal Supply Driven Internally l 4.3 4.4 4.5 V IDD48 VDD48 Supply Current VDD5 – VSS = 5V Internal VDD5 l l 1 2 2 4 mA mA IDD5 VDD5 Supply Current VDD5 – VSS = 5V l 12 mA Power MOSFET RON On-Resistance I = 350mA, Measured From OUT to VSS l 1.5 2.4 3.0 Ω Ω IOUT_LEAK OUT Pin Leakage VOUT – VSS = VDD48 – VSS = 57V l 110 μA RPU OUT Pin Pull-Up Resistance to VDD48 0V ≤ (VDD48 – VOUT) ≤ 5V l 360 500 640 kΩ Current Control ICUT Overload Current Threshold Class 0, Class 3, Class 4 (Note 6) Class 2 Class 1 l l l 355 165 95 375 175 100 395 185 105 mA mA mA ILIM Short-Circuit Current Limit VOUT – VSS = 5V VDD48 – VOUT = 30V l l 405 405 425 425 445 445 mA mA IFB Foldback Current Limit VDD48 – VOUT = 0V (Note 7) VDD48 – VOUT = 10V l l 30 110 60 140 120 180 mA mA IMIN DC Disconnect Current Threshold l 5.2 7.5 9.8 mA IFAULT High Speed Fault Current Limit (Note 8) l 500 650 800 mA Detection IDET Detection Current First Point, VDD48 – VOUT = 10V Second Point, VDD48 – VOUT = 3.5V l l 235 160 255 180 275 200 μA μA VDET Detection Voltage Compliance VDD48 – VOUT, Open Port VDD48 – VSS = 57V l 21 V RDETMIN Minimum Valid Signature Resistance l 15.5 17 18.5 kΩ RDETMAX Maximum Valid Signature Resistance l 27.5 29.7 32 kΩ ROPEN Open Circuit Threshold l 500 2000 kΩ Classification VCLASS Classification Voltage VDD48 – VOUT, 0mA ≤ ICLASS ≤ 50mA l 16.5 20.5 V ICLASS Classification Current Compliance VOUT = VDD48 l 55 60 75 mA ITCLASS Classification Threshold Current Class 0 – 1 Class 1 – 2 Class 2 – 3 (Note 9) l l l 5.5 13.5 21.5 6.5 14.5 23 7.5 15.5 24.5 mA mA mA Power Management VPWRMGT Power Management Pin Threshold l 0.98 1 1.02 V IPWRMGT Power Management Pin Output Current Class 0, Class 3, Class 4 Class 1 Class 2 l l l –75.6 –19.6 –34.3 –72.3 –18.8 –32.8 –69 –17.9 –31.3 μA μA μA AC Disconnect ROSC OSC Pin Input Impedance 2V ≤ (VOSC – VSS) ≤ 3V l 175 250 325 kΩ IOSC OSC Pin Output Current VOSC – VSS = 2V l –140 140 μA fOSC OSC Pin Frequency VOSC – VSS = 2V l 103 110 115 Hz |
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