Linear Technology LTC2955IDDB-2 PB On/Off Controller with Automatic Turn On (/EN output) DC1836A-B DC1836A-B Ficha De Dados
Códigos do produto
DC1836A-B
LTC2955
1
2955f
LT3008-3.3
V
OUT
V
IN
PB
ON
INT
KILL
PGD
V
IN
SEL
LTC2955DDB-1
2955 TA01a
GND
TMR
EN
3.3V
1M
R7
1M
1M
2.32M
SHDN
0.1μF
8.4V
V
TRIP
= 5.4V
μP
POWER-FAIL
402k
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Pushbutton On/Off
Controller with Automatic
Turn-On
The LTC
®
2955 is a micropower, pushbutton on/off control-
ler that manages system power by generating a clean enable
output from the supply monitor input and the debounced
pushbutton input. It features an interrupt output that
notifies the system of a pushbutton or low supply event.
When the system is ready, it may use the power kill input
to shut off power. If the pushbutton remains pressed for
more than the configurable turn-off duration, the system
power is forced off.
output from the supply monitor input and the debounced
pushbutton input. It features an interrupt output that
notifies the system of a pushbutton or low supply event.
When the system is ready, it may use the power kill input
to shut off power. If the pushbutton remains pressed for
more than the configurable turn-off duration, the system
power is forced off.
The supply input covers a wide range from 1.5V to 36V.
The robust pushbutton input handles wide voltage swings
of ±36V and ESD strikes to ±25kV (human body model)
without latchup or damage. A low 1.2μA supply current
maximizes battery run time. Separate versions are avail-
able for positive or negative enable polarities.
The robust pushbutton input handles wide voltage swings
of ±36V and ESD strikes to ±25kV (human body model)
without latchup or damage. A low 1.2μA supply current
maximizes battery run time. Separate versions are avail-
able for positive or negative enable polarities.
Pushbutton On/Off with Interrupt
APPLICATIONS
n
Automatic Turn-On Via Voltage Monitor Input
n
Wide Input Supply Range: 1.5V to 36V
n
Low Supply Current: 1.2μA
n
±25kV ESD HBM on PB Input
n
±36V Wide Input Voltage for PB Input
n
Low Leakage EN Output Allows DC/DC Converter
Control (LTC2955-1)
n
High Voltage EN Output Drives External P-Channel
MOSFET (LTC2955-2)
n
Simple Interface Allows Graceful μP Shutdown
n
Adjustable Turn-Off Timer
n
10-Lead 3mm × 2mm DFN and 8-Lead ThinSOT™
Packages
n
Desktop and Notebook Computers
n
GPS Devices
n
Portable Instruments
n
Automotive Electronics
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
TURN ON PULSE
SHORT PULSE
LONG PULSE
TURNS ON
STAYS ON
INTERRUPT
INTERRUPT
TURNS OFF
PB
2955 TA01b
EN
INT
Automatic Turn-On with Power-Fail Indication