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LTC4270 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4270 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 30 page  LTC4266A/LTC4266C 3 4266acfc ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VEE Main PoE Supply Voltage AGND – VEE For IEEE Type 1 Compliant Output For IEEE Type 2 Compliant Output For LTPoE++ Compliant Output l l l 45 51 54.75 57 57 57 V V V Undervoltage Lockout AGND – VEE l 20 25 30 V VDD VDD Supply Voltage VDD – DGND l 3.0 3.3 4.3 V Undervoltage Lockout l 2.2 V Allowable Digital Ground Offset DGND – VEE l 25 57 V IEE VEE Supply Current (AGND – VEE) = 55V l –2.4 –5 mA IDD VDD Supply Current (VDD – DGND) = 3.3V l 1.1 3 mA Detection Detection Current – Force Current First Point, AGND – VOUTn = 9V Second Point, AGND – VOUTn = 3.5V l l 220 140 240 160 260 180 μA μA Detection Voltage – Force Voltage AGND – VOUTn, 5μA ≤ IOUTn ≤ 500μA First Point Second Point l l 7 3 8 4 9 5 V V Detection Current Compliance AGND – VOUTn = 0V l 0.8 0.9 mA VOC Detection Voltage Compliance AGND – VOUTn, Open Port l 10.4 12 V Detection Voltage Slew Rate AGND – VOUTn, CPORT = 0.15μF l 0.01 V/μs Minimum Valid Signature Resistance l 15.5 17 18.5 kΩ Maximum Valid Signature Resistance l 27.5 29.7 32 kΩ Classification VCLASS Classification Voltage AGND – VOUTn, 0mA ≤ ICLASS ≤ 50mA l 16.0 20.5 V Classification Current Compliance VOUTn = AGND l 53 61 67 mA Classification Threshold Current Class 0 – 1 Class 1 – 2 Class 2 – 3 Class 3 – 4 Class 4 – Overcurrent l l l l l 5.5 13.5 21.5 31.5 45.2 6.5 14.5 23 33 48 7.5 15.5 24.5 34.9 50.8 mA mA mA mA mA VMARK Classification Mark State Voltage AGND – VOUTn, 0.1mA ≤ ICLASS ≤ 10mA l 7.5 9 10 V Mark State Current Compliance VOUTn = AGND l 53 61 67 mA Gate Driver GATE Pin Pull-Down Current Port Off, VGATEn = VEE + 5V Port Off, VGATEn = VEE + 1V l l 0.4 0.08 0.12 mA mA GATE Pin Fast Pull-Down Current VGATEn = VEE + 5V 30 mA GATE Pin On Voltage VGATEn – VEE, IGATEn = 1μA l 812 14 V Output Voltage Sense VPG Power Good Threshold Voltage VOUTn – VEE l 2 2.4 2.8 V OUT Pin Pull-Up Resistance to AGND 0V ≤ (AGND – VOUTn) ≤ 5V l 300 500 700 kΩ The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AGND – VEE = 54V, AGND = DGND, and VDD – DGND = 3.3V unless otherwise noted. (Notes 3, 4) |
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Similar Description - LTC4270 |
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