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LTC2952CF Datasheet(PDF) 4 Page - Linear Technology |
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LTC2952CF Datasheet(HTML) 4 Page - Linear Technology |
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4 / 30 page  LTC2952 4 2952fa ELECTRICAL CHARACTERISTICS The l 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) l ±1.6 ±2.0 ±2.4 μA tDB,ON/OFF Internal Default On-Time/Off-Time tDB,ON: CONT = Open, Measured Time Between PB Low → EN High, tDB,OFF: Measured Time Between PB Low → INT High l 18 26 34 ms tONT,OFFT Additional Adjustable Turn-On/Turn- Off Time (Note 7) CONT = 1500pF, COFFT = 1500pF l 10 15 20 ms Accurate Comparator Input Pins (VM, PFI, M1, M2, KILL) VTH_VM VM Input Reset Threshold Both Falling and Rising l 0.492 0.500 0.508 V VTH PFI, M1, M2, KILL Input Threshold Voltage Falling l 0.492 0.500 0.508 V VHYS PFI, M1, M2, KILL Input Hysteresis l 515 25 mV IIN_LKG VM, PFI, M2, KILL Input Current V = 0.5V l ±0.1 μA IM1_SRC M1 Input Pull-Up Current M1 = 1V l –1.5 –3 –5 μA VM1(VOC) M1 Voltage Open-Circuit l 146 V IM1_LKG M1 Input Leak Current M1 = 6V l ±0.1 μA Watchdog/Extend Pin (WDE) VWDE(H,TH) Input High Threshold Voltage l 1.5 V VWDE(L,TH) Input Low Threshold Voltage l 0.3 V IWDE(IN,HL) High Low Input Current (Note 8) l ±25 μA IWDE(IN,HZ) Hi-Z Input Current VWDE = 0.7V, 1.1V l ±10 μA Open-Drain Output Pins (G1STAT, INT, RST, PFO) IOUT_LKG Leakage Current VPIN = 5V l ±1 μA VOL Voltage Output Low IPIN = 1mA l 0.4 V High Voltage Open-Drain Output Pin (EN) IEN(LKG) EN Leakage Current VEN = 28V, EN Sink Current Off l ±1 μA VEN(VOL) EN Voltage Output Low IEN = 3mA l 0.4 V V1 = 1.2V and/or V2 = 1.2V, IEN = 100μA l 0.05 0.3 V Voltage Monitor/Watchdog Timing tRST Reset Timeout Period l 140 200 260 ms tWDE Watchdog Timeout Period l 1.1 1.6 2.1 s tWDE(PW MIN) Minimum Period Between Consecutive Edges l 510 μs tVM(UV) VM Undervoltage Detect to RST VM Less Than VTH_VM by More Than 1% 150 μs tPFI PFI Delay to PFO PFI More or Less Than VPFI_TH by More Than 1% 150 μs |
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