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LTC4278 Datasheet(PDF) 9 Page - Linear Technology |
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LTC4278 Datasheet(HTML) 9 Page - Linear Technology |
9 / 32 page LTC4270/LTC4271 9 42701f 802.3at ILIM Threshold vs Temperature TYPICAL PERFORMANCE CHARACTERISTICS DC Disconnect Threshold vs Temperature 802.3at Current Limit Foldback INT and SDAOUT Pull Down Voltage vs Load Current MOSFET Gate Drive With Fast Pull Down 802.3at ICUT Threshold vs Temperature TEMPERATURE (°C) –40 204 216 212 208 220 816 864 848 832 880 40 60 80 100 120 –20 0 42701 G09 20 PORT 1 REG 48h = C0h RSENSE = 0.25Ω TEMPERATURE (°C) –40 152 162 164 160 158 156 154 166 608 648 640 632 624 616 664 656 40 60 80 100 120 –20 0 42701 G10 20 PORT 1 REG 47h = E2h RSENSE = 0.25Ω TEMPERATURE (°C) –40 1.25 2.00 2.25 1.75 1.50 2.50 5 8 7 6 10 9 40 60 80 100 120 –20 0 42701 G11 20 PORT 1 REG 47h = E2h RSENSE = 0.25Ω VOUTn (V) –54 0 600 500 800 700 400 300 200 100 900 0 125 100 75 50 25 225 200 175 150 –36 –27 –18 –9 0 –45 42701 G12 PORT 1 REG 48h = C0h RSENSE = 0.25Ω 100μs/DIV GND 0mA 42701 G14 VEE VEE PORT CURRENT 500mA/DIV GATE VOLTAGE 10V/DIV PORT VOLTAGE 20V/DIV CURRENT LIMIT 50Ω FAULT REMOVED 50Ω FAULT APPLIED VDD = 3.3V VEE = –54V FAST PULL DOWN LOAD CURRENT (mA) 42701 G13 020 10 30 40 50 60 3.0 2.5 2.0 1.5 1.0 0.5 0.0 |
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