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LTC4212CMS Datasheet(PDF) 3 Page - Linear Technology |
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LTC4212CMS Datasheet(HTML) 3 Page - Linear Technology |
3 / 24 page 3 LTC4212 4212f VPGFHI Power Good Glitch Filter High Threshold q 1.20 1.236 1.26 V VPGFHST Power Good Glitch Filter Hysterisis (Note 4) 40 mV VPGTHI Power Good Timer High Threshold q 0.928 0.952 0.976 V VPGTLO Power Good Timer Low Threshold q 0.640 0.657 0.680 V VPGT∆V Power Good Timer Delta Threshold q 0.283 0.295 0.304 V IPGT Power Good Timer Pin Current Power Good Timer On, CPGT Charging, PGT = 0.65V q – 5.61 – 5.1 – 4.59 µA Power Good Timer On, CPGT Discharging, PGT = 0.95V q 4.63 5.2 5.77 µA Power Good Timer Off, PGT = 1.5V 5 mA IPGF Power Good Glitch Filter Pin Current Power Good Glitch Filter On, CPGF Charging q – 5.61 -5.1 – 4.49 µA Power Good Timer Off, PGF = 1.5V 5 mA ITMR TIMER Current Timer On, VTIMER = 1V q – 2.5 – 2 – 1.5 µA Timer Off, TIMER = 1.5V 5 mA VTMR TIMER Threshold TIMER Low to High q 1.20 1.236 1.26 V TIMER High to Low q 0.15 0.200 0.40 V VFAULT FAULT Threshold Latched Off Threshold, FAULT High to Low q 1.20 1.236 1.26 V VFAULTHST FAULT Threshold Hysteresis 50 mV VOLFAULT Output Low Voltage IFAULT = 1.6mA q 0.14 0.4 V tTO Power Good Time-Out CPGT =10nF, PGT = 0.1V to FAULT Low q 16.3 18.16 20 ms tFAULTLO Power Good Input Low at Time-Out to End of 14th PGT Cycle 1 µs GATE Discharging tFAULTVG Valid Power Good Glitch to GATE PGF > 1.26V 1.5 µs Discharging tFAULTFC FAST COMP Trip to GATE Discharging VCB = 0mV to 200mV Step q 500 700 ns tFAULTSC SLOW COMP Trip to GATE Discharging VCB = 0mV to 100mV Step q 10 18 30 µs tEXTFAULT FAULT Low to GATE Discharging VFAULT = 5V to 0V q 13 5 µs tRESET Circuit Breaker Reset Delay Time ON Low to FAULT High q 120 250 µs tOFF Turn-Off Time ON Low to GATE Off 10 µs The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VCC = 5V, unless otherwise noted. (Note 2) ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All current into device pins are positive; all current out of device pins are negative; all voltages are referenced to ground unless otherwise specified. Note 3: An internal clamp limits the GATE pin to a minimum of 10V above VCC. Driving this pin to voltages beyond the clamp may damage the part. If a lower GATE pin voltage is desired, use an external zener diode. The GATE capacitance must be < 0.15 µF at maximum VCC. Note 4: Guaranteed by design and not tested in production. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS |
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