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LTC4311 Datasheet(PDF) 6 Page - Linear Technology |
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LTC4311 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 32 page  LTC4290/LTC4271 6 429071f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS XIO VOLX XIO Digital Output Low VXIOn – VEE, IXIOn = 5mA l 0.7 V VOHX XIO Digital Output High VXIOn – VEE, IXIOn = 100µA l 3.5 V XIO Digital Input Low Voltage VXIOn – VEE l 0.8 V XIO Digital Input High Voltage VXIOn – VEE l 3.4 V Internal Pull Up to CAP2 XIO0, XIO1 50 kΩ PSE Timing Characteristics tDET Detection Time Beginning To End of Detection (Note 7) 220 ms tCLE Class Event Duration (Note 7) 12 ms tCLEON Class Event Turn On Duration CPORT = 0.6µF (Note 7) l 0.1 ms tME Mark Event Duration (Note 7, Note 11) 8.6 ms tMEL Last Mark Event Duration (Note 7, Note 11) l 16 22 ms tPON Power On Delay in AUTO Pin Mode From End of Valid Detect to Application of Power to Port (Note 7) l 60 ms Turn-On Rise Time (AGND – VOUT): 10% to 90% of (AGND - VEE) CPORT = 0.15µF (Note 7) l 15 24 µs Turn-On Ramp Rate CPORT = 0.15µF (Note 7) l 10 V/µs tTOCL Turn-On Class Transition CPORT = 0.15µF (Note 7) l 0.1 ms tED Fault Delay From ICUT or ILIM Fault to Next Detect (Note 7) l 1.0 1.1 s Midspan Mode Detection Backoff RPORT = 15.5kΩ (Note 7) l 2.3 2.5 2.7 s Power Removal Detection Delay From Power Removal After tDIS to Next Detect (Note 7) l 1.0 1.3 2.5 s tSTART Maximum Current Limit Duration During Port Start-Up (Note 7) l 52 59 66 ms tCUT Maximum Overcurrent Duration After Port Start- Up (Note 7) l 52 59 66 ms Maximum Overcurrent Duty Cycle (Note 7) l 5.8 6.3 6.7 % tLIM Maximum Current Limit Duration After Port Start- Up – tLIM Enabled tLIM = 1 (Note 7, Note 12) l 10 12 14 ms Maximum Current Limit Duration After Port Start- Up – tLIM as tCUT tLIM = 0 (Note 7, Note 12) l 52 59 66 ms tMPS Maintain Power Signature (MPS) Pulse Width Sensitivity Current Pulse Width to Reset Disconnect Timer (Note 7, Note 8) l 1.6 3.6 ms tDIS Maintain Power Signature (MPS) Dropout Time (Note 7, Note 5) l 320 350 380 ms tMSD Masked Shut Down Delay (Note 7) 6.5 µs I2C Watchdog Timer Duration (Note 7) l 1.5 2 3 s Minimum Pulse Width for Masked Shut Down (Note 7) l 3 µs Minimum Pulse Width for RESET (Note 7) l 4.5 µs ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AGND – VEE = 54V and VDD – DGND = 3.3V unless otherwise noted. (Notes 3 & 4) |
Similar Part No. - LTC4311 |
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Similar Description - LTC4311 |
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