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LTC2905 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC2905
Description  Push Button On/Off Controller
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2905 Datasheet(HTML) 1 Page - Linear Technology

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LTC2951
1
2951f
EN
2V/DIV
PB
25ms/DIV
2951 TA01b
128ms
Push Button On/Off
Controller
The LTC®2951 is a micropower, wide input voltage range
push button ON/OFF controller. The part contains a push
button input which controls the toggling of an open drain
enable output. The push button turn OFF debounce time
is externally programmable, while the turn ON debounce
time is fixed at 128ms. A simple microprocessor interface
allows for proper system housekeeping prior to power
down. Under system fault conditions, an adjustable ⎯K⎯I⎯L⎯L
timeout delay ensures proper power down.
The LTC2951 operates over a 2.7V to 26V input voltage
range to accommodate a variety of input power supplies.
Very low quiescent current (6µA typical) makes the
LTC2951 ideally suited for battery powered applications.
Two versions of the part are available to accommodate
either positive or negative enable polarities. The parts
are available in 8-pin 3mm × 2mm DFN and ThinSOT
packages.
Portable Instrumentation Meters
Blade Servers
Portable Customer Service PDA
Desktop and Notebook Computers
Adjustable Push Button Debounce and Delay
Timers
Low Supply Current: 6µA
Wide Operating Voltage Range: 2.7V to 26V
EN Output (LTC2951-1) Allows DC/DC Converter
Control
⎯E⎯N Output (LTC2951-2) Allows Circuit Breaker
Control
Simple Interface Allows Graceful µP Shut Down
High Input Voltage ⎯P⎯B Pin with Internal Pull Up
Resistor
±10kV ESD HBM on ⎯P⎯B Input
Accurate 0.6V Threshold on ⎯K⎯I⎯L⎯L Comparator Input
8-Pin 3mm × 2mm DFN and ThinSOT
TM Packages
VIN
SHDN
VIN
VOUT
EN
INT
KILL
INT
KILL
LTC2951-1
KILLT
OFFT
DC/DC
BUCK
µP/µC
3V – 26V
*OPTIONAL
R1
10k
2951 TA01
CKILLT*
0.033
µF
COFFT*
0.033
µF
PB
GND
VIN
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is
a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners.
APPLICATIO S
FEATURES
DESCRIPTIO
TYPICAL APPLICATIO
Turn On Debounce


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