LTC2952 Ver la hoja de datos (PDF) - Linear Technology
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LTC2952 Datasheet PDF : 30 Pages
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LTC2952
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
μP Handshake Timing
tINT(MIN)
INT Minimum Pulse Width
Minimum Measured Time PB Rising to
l 10
50
250
μs
INT Rising
tKILL(PW)
tKILL,ON BLANK
KILL Minimum Pulse Width
KILL On Blanking (Note 9)
Full Swing Pulse From 5V to 0V
l
150
500
μs
KILL = 0V, Measured Time Between EN Rising l 270
400
530
ms
→ EN Falling
tKILL, OFF WAIT
KILL Wait Time (Note 10)
KILL = 1V, COFFT = OPEN, Measured Time
l 270
400
530
ms
Between INT Falling → EN Falling
tEN, LOCKOUT
Enable Lockout Time (Note 11)
Measured Time Between EN Falling → EN
l 270
400
530
ms
Rising
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The greatest of V1, V2 or VS is the internal supply voltage (VMAX).
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4: V2PREF_TH is the minimum voltage level at which V2 becomes
the preferential source of quiescent current when both of the ideal diodes
are off.
Note 5: VS is stepped from (V1 or V2) + 0.2V to (V1 or V2) – 0.2V to
trigger the event. The gate voltages are initially VG(OFF).
Note 6: VS is stepped from VX – 0.2V to VX + 0.2V to trigger the event.
Gate voltages are initially clamped at VG(ON).
Note 7: The adjustable turn-on and turn-off timer period is the adjustable
debounce period following the Internal default-on and default-off timer
period, respectively.
Note 8: The input current to the three-state WDE pin are the pull-up
and the pull-down current when the pin is either set to 3.3V or GND,
respectively. In the open state, the maximum pull-up or pull-down leakage
current permissible is 10μA.
Note 9: The turn-on KILL blanking time is the waiting period immediately
following the EN pin switching high; at the end of this period the input
to the KILL needs to be high to indicate that the system has powered up
properly, otherwise the EN pin is immediately switched low.
Note 10: The KILL wait time during the power-down process is the wait
period immediately following a valid turn-off command until the EN pin
switches low.
Note 11: The enable lockout time is the minimum wait time between the
last falling edge and the next rising edge on the EN pin.
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