Linear Technology DC1099A - LTC2953 Push-Button Controller with Dual Battery Monitor DC1099A DC1099A Ficha De Dados
Códigos do produto
DC1099A
LTC2953
1
2953f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Push Button
On/Off Controller
with Voltage Monitoring
The LTC
®
2953 is a push button On/Off controller that
manages system power via a push button interface. An
enable output toggles system power while an interrupt
output provides debounced push button status. The inter-
rupt output can be used in menu driven applications to
request a system power down.
enable output toggles system power while an interrupt
output provides debounced push button status. The inter-
rupt output can be used in menu driven applications to
request a system power down.
The LTC2953 also features input and output power sup-
ply monitors. An uncommitted power fail comparator
provides real time input monitor information, while a
de-glitched under voltage lockout comparator gracefully
initiates a system power down. The under voltage lockout
comparator prevents the system from powering from a
low power supply.
ply monitors. An uncommitted power fail comparator
provides real time input monitor information, while a
de-glitched under voltage lockout comparator gracefully
initiates a system power down. The under voltage lockout
comparator prevents the system from powering from a
low power supply.
The adjustable supply monitor input is compared against
an accurate internal 0.5V reference. The reset output
remains low until the supply monitor input has been in
compliance for 200ms.
an accurate internal 0.5V reference. The reset output
remains low until the supply monitor input has been in
compliance for 200ms.
The LTC2953 operates over a wide 2.7V to 27V input
voltage range and draws only 14μA of current. Two ver-
sions of the part accommodate either positive or negative
enable polarities.
voltage range and draws only 14μA of current. Two ver-
sions of the part accommodate either positive or negative
enable polarities.
Push Button On/Off Control with Interrupt
■
Wide Operating Voltage Range: 2.7V to 27V
■
Push Button Control of System Power
■
Low Supply Current: 14μA
■
Power Fail Comparator Generates Warning
■
UVLO Comparator Gracefully Latches Power Off
■
Adjustable Supply Monitor with 200ms Reset
■
Adjustable Power Down Timer
■
Low Leakage EN Output (LTC2953-1) Allows DC/DC
Converter Control
■
High Voltage
⎯E⎯N Output (LTC2953-2) Allows Circuit
Breaker Control
■
Simple Interface Allows Orderly System Power Up
and Power Down
■
±1.5% Threshold Tolerances
■
±10kV ESD HBM on
⎯P⎯B Input
■
12-Pin 3mm
× 3mm DFN
■
Push Button Power Path Control
■
Battery Power Supervisor
■
Portable Instrumentation, PDA
■
Blade Servers
■
Desktop and Notebook Computers
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TURN ON PULSE
TURNS ON
STAYS ON
INTERRUPT
INTERRUPT
TURNS OFF
SHORT
INTERRUPT PULSE
LONG
TURN OFF PULSE
PB
INT
2954 TD01b
EN
V
IN
V
OUT
ON/OFF
EN
V
IN
VM
RST
PFO
INT
KILL
RST
GPIO
INT
KILL
LTC2953-1
PDT
DC/DC
SHDN
SYSTEM
LOGIC
8.4V
3.3V
499k
100k
100k
100k
100k
100k
t
PDT
= 6.4 SECONDS
2953 TA01
1
μF
PB
GND
PFI
UVLO
2150k
23.2k
196k
+