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LTC2952CUF Datasheet(PDF) 4 Page - Linear Technology |
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LTC2952CUF Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  LTC2952 4 2952f ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V1 = V2 = VS = 2.7V TO 28V unless otherwise noted. (Notes 2, 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Debounce Time Pins (ONT, OFFT) IONT,OFFT ONT/OFFT Pull-Up/Pull-Down Current When Timer is Active VONT, VOFFT = 0V (Pull-Up), VONT, VOFFT = 1.5V (Pull-Down) ● ±1.6 ±2.0 ±2.4 µA tDB,ON/OFF Internal Default On-Time/Off-Time tDB,ON: CONT = Open, Measured Time Between ⎯P⎯B Low → EN High, tDB,OFF: Measured Time Between ⎯P⎯B Low → INT High ● 18 26 34 ms tONT,OFFT Additional Adjustable Turn-On/Turn- Off Time (Note 7) CONT = 1500pF, COFFT = 1500pF ● 10 15 20 ms Accurate Comparator Input Pins (VM, PFI, M1, M2, ⎯K⎯I⎯L⎯L) VTH_VM VM Input Reset Threshold Both Falling and Rising ● 0.492 0.500 0.508 V VTH PFI, M1, M2, ⎯K⎯I⎯L⎯L Input Threshold Voltage Falling ● 0.492 0.500 0.508 V VHYS PFI, M1, M2, ⎯K⎯I⎯L⎯L Input Hysteresis ● 515 25 mV IIN_LKG VM, PFI, M2, ⎯K⎯I⎯L⎯L Input Current V = 0.5V ● ±0.1 µA IM1_SRC M1 Input Pull-Up Current M1 = 1V ● –1.5 –3 –5 µA VM1(VOC) M1 Voltage Open Circuit ● 146 V IM1_LKG M1 Input Leak Current M1 = 6V ● ±0.1 µA Watch-Dog/Extend Pin (WDE) VWDE(H,TH) Input High Threshold Voltage ● 1.5 V VWDE(L,TH) Input Low Threshold Voltage ● 0.3 V IWDE(IN,HL) High Low Input Current (Note 8) ● ±25 µA IWDE(IN,HZ) High Z Input Current VWDE = 0.7V, 1.1V ● ±10 µA Open Drain Output Pins (G1STAT, ⎯I⎯N⎯T, ⎯R⎯S⎯T, ⎯P⎯F⎯O) IOUT_LKG Leakage Current VPIN = 5V ● ±1 µA VOL Voltage Output Low IPIN = 1mA ● 0.4 V High Voltage Open Drain Output Pin (EN) IEN(LKG) EN Leakage Current VEN = 28V, EN Sink Current Off ● ±1 µA VEN(VOL) EN Voltage Output Low IEN = 3mA ● 0.4 V V1 = 1.2V and/or V2 = 1.2V, IEN = 100µA ● 0.05 0.3 V Voltage Monitor/Watchdog Timing tRST Reset Time-Out Period ● 140 200 260 ms tWDE Watch-Dog Time-Out Period ● 1.1 1.6 2.1 s tWDE(PW MIN) Minimum Period Between Consecutive Edges ● 510 µs tVM(UV) VM Undervoltage Detect to ⎯R⎯S⎯T VM Less Than VTH_VM by more than 1% 150 µs tPFI PFI Delay to ⎯P⎯F⎯O PFI More or Less Than VPFI_TH by more than 1% 150 µs |
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