LTC2952 Linear Technology, LTC2952 Datasheet - Page 5

• Manufacturer Part Number: LTC2952
• Description: Pushbutton PowerPath Controller
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
μP Handshake Timing
t
t
t
t
t
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 (V
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4: V2
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 V
Note 6: VS is stepped from V
Gate voltages are initially clamped at V
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.
INT(MIN)
KILL(PW)
KILL,ON BLANK
KILL, OFF WAIT
EN, LOCKOUT
PREF_TH
is the minimum voltage level at which V2 becomes
PARAMETER
INT Minimum Pulse Width
KILL Minimum Pulse Width
KILL On Blanking (Note 9)
KILL Wait Time (Note 10)
Enable Lockout Time (Note 11)
X
– 0.2V to V
G(ON)
X
.
+ 0.2V to trigger the event.
G(OFF)
.
A
CONDITIONS
Minimum Measured Time PB Rising to
INT Rising
Full Swing Pulse From 5V to 0V
KILL = 0V, Measured Time Between EN Rising
→ EN Falling
KILL = 1V, C
Between INT Falling → EN Falling
Measured Time Between EN Falling → EN
Rising
= 25°C. V1 = V2 = VS = 2.7V to 28V unless otherwise noted. (Notes 2, 3)
The
MAX
).
l
OFFT = OPEN
denotes the specifications which apply over the full operating
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.
, Measured Time
l
l
l
l
l
MIN
270
270
270
10
TYP
150
400
400
400
50
LTC2952
MAX
250
500
530
530
530
UNITS
2952fa
5
ms
ms
ms
μs
μs