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LTC4258CGW Datasheet(PDF) 5 Page - Linear Technology |
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LTC4258CGW Datasheet(HTML) 5 Page - Linear Technology |
5 / 28 page LTC4258 5 4258fb TYPICAL PERFOR A CE CHARACTERISTICS Power On Sequence in Auto Mode Current Limit Foldback Powering On a 180 µF Load INT and SDAOUT Pull Down Voltage vs Load Current 50ms/DIV 4258 G01 GND PORT VOLTAGE 10V/DIV VEE PORT 1 VDD = 3.3V VEE = –48V DETECTION PHASE 1 CLASSIFICATION POWER ON DETECTION PHASE 2 5ms/DIV 4258 G02 GND PORT VOLTAGE 20V/DIV GATE VOLTAGE 10V/DIV PORT CURRENT 500mA/DIV VEE VEE VEE +14V VDD = 3.3V VEE = –48V 0mA FOLDBACK 425mA CURRENT LIMIT FET ON LOAD FULLY CHARGED 225 200 175 150 125 100 75 50 25 0 450 400 350 300 250 200 150 100 50 0 VOUTn-AGND (V) –48 0 4258 G03 –40 –24 –32 –16 –8 VDD = 3.3V VEE = –48V TA = 25°C LOAD CURRENT (mA) 0 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 20 4258 G06 5 10 15 25 VDD = 3.3V TA = 25°C Classification Transient Response to 40mA Load Step Classification Current Compliance VEE DC Supply Current vs Supply Voltage 50 µs/DIV 4258 G07 PORT VOLTAGE 1V/DIV PORT CURRENT 20mA/DIV VDD = 3.3V VEE = –48V TA = 25°C 0mA –18V 40mA CLASSIFICATION CURRENT (mA) 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 4258 G08 0 102030 405060 70 DETECT n PIN VOLTAGE PORT VOLTAGE WITH TYPICAL CMPD3003 VDD = 3.3V VEE = –48V TA = 25°C VEE SUPPLY VOLTAGE (V) –70 3.0 2.5 2.0 1.5 1.0 0.5 0 –40 –20 4258 G09 –60 –50 –30 –10 0 VDD = 3.3V REG 12h = 00h |
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