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LTC4151 Datasheet(PDF) 5 Page - Analog Devices |
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LTC4151 Datasheet(HTML) 5 Page - Analog Devices |
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5 / 74 page  LTC4283 5 Rev. B For more information www.analog.com ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Drain Monitor VD,PG(TH) DRAIN Input Threshold for Power Good DRAIN Falling l 2 2.05 2.1 V ∆VD,PG(HYST) DRAIN Input Hysteresis for Power Good 20 mV VD,FET(TH) DRAIN Input Threshold for FET Bad Timer and TMR Pull-Up Current (Table 11) DRAIN Rising, VDTH = 00b – 11b l ±10 % ∆VD,FET(HYST) DRAIN Input Hysteresis with VD,FET(TH) 10 mV IDRAIN DRAIN Input Current VDRAIN = 200mV l 0 ±0.1 µA VDRAIN = 2 V l 0 ±1 µA Current Limit VILIM Current Limit Voltage DAC Zero-Scale ILIM = 0000b l 14.5 15 15.5 mV Current Limit Voltage DAC Full-Scale ILIM = 1111b l 29 30 31 mV Current Limit Voltage DAC INL l 0 ±50 µV aSTARTUP Current Limit Foldback Factor at Startup RTNS = 1.8V, DRNS = 0, 1.8V FB = 01b l 45 50 55 % FB = 10b l 16 20 24 % FB = 11b l 7 10 13 % aNORMAL Current Limit Foldback Factor in Normal Operation RTNS = DRNS = 1.8V FB = 01b l 45 50 55 % FB = 10b l 15 20 26 % FB = 11b l 6 10 16 % VILIM(FAST) Fast Pull-Down Sense Threshold Voltage ILIM = 0000b l 20 30 40 mV ILIM = 1111b l 47 60 70 mV ISENSE+ SENSE+ Input Current SENSE+ = 33mV l 0 ±1 µA ISENSE– SENSE– Input Current SENSE– = SENSE+ = 0 l –8 –17 –35 µA Circuit Breaker/SOA Timer ITMR(UP) TMR Pull-Up Current in Current Limit Onset DRNS = 0V, TMR = 1V l –1.5 –2 –2.5 µA Startup in Foldback dV/dt Control Disabled, DRNS = 1.8V, TMR = 1V FB = 00b l –192 –202 –212 µA FB = 01b l –96 –102 –108 µA FB = 10b l –39 –42 –45 µA FB = 11b l –20 –22 –24 µA Startup in dV/dt dV/dt Control Enabled, DRNS = 1.8V, TMR = 1V l –192 –202 –212 µA Hard Short in Normal Operation DRNS = 1.8V, TMR = 1V l –192 –202 –212 µA ITMR(DN) TMR Pull-Down Current DRAIN < VD,FET(TH) or Start into dV/dt Control, THERM_TMR = 0, TMR = 1V l 1.6 2 2.3 µA ITMR(RST) TMR Reset Current EN# = High, TMR = 1V l 3 5 8 mA VTMRH(TH) TMR Fault Threshold TMR Rising l 2.028 2.048 2.068 V VTMRH(HYST) TMR Fault Hysteresis 20 mV VTMRL(TH) TMR Low Status Threshold TMR Falling l 80 100 120 mV VTMRL(HYST) TMR Low Hysteresis 20 mV The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, IIN + IVZ = 4mA with VIN Connected to VZ. (Note 2) |
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