LTC2954 - Push Button On/Off Controller with µP Interrupt

The LTC2954 is a pushbutton on/off controller that manages system power via a pushbutton interface. An enable output toggles system power while an interrupt output provides debounced pushbutton status. The interrupt output can be used in menu driven applications to request a system power-down. A power kill input allows a microprocessor or system to reset the enable output, effectively powering down the system. Independently adjustable on and off timers allow dependable pushbutton control of the enable output and resistance to accidental toggling of system power.

The LTC2954 operates over a wide 2.7V to 26.4V input voltage range to accommodate a wide variety of input power supplies. Very low quiescent current (6μA typical) makes the LTC2954 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities.

Features

Adjustable Power On/Off Timers
Low Supply Current: 6μA
Wide Operating Voltage Range: 2.7V to 26.4V
Low Leakage EN Output (LTC2954-1) Allows DC/DC Converter Control
High Voltage EN Output (LTC2954-2) Allows Circuit Breaker Control
Simple Interface Allows Graceful μP Shutdown
High Input Voltage PB Pin with Internal Pull-Up Resistor
±10kV ESD HBM on PB Input
Accurate 0.6V Threshold on KILL Comparator Input
8-Pin 3mm × 2mm DFN and ThinSOT™ Packages

Typical Application

Applications

Pushbutton PowerPath™ Control
Portable Instrumentation Meters
Blade Servers
Portable Customer Service PDA
Desktop and Notebook Computers

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC2954CDDB-1#PBF	3x2 DFN-8	C	$2.59
LTC2954CDDB-1#TRMPBF	3x2 DFN-8	C	$2.59	$1.83
LTC2954CDDB-1#TRPBF	3x2 DFN-8	C	$2.59	$1.81
LTC2954CDDB-2#PBF	3x2 DFN-8	C	$2.59
LTC2954CDDB-2#TRMPBF	3x2 DFN-8	C	$2.59	$1.83
LTC2954CDDB-2#TRPBF	3x2 DFN-8	C	$2.59	$1.81
LTC2954CTS8-1#PBF	SOT-23	C	$2.59
LTC2954CTS8-1#TRMPBF	SOT-23	C	$2.59	$1.83
LTC2954CTS8-1#TRPBF	SOT-23	C	$2.59	$1.81
LTC2954CTS8-2#PBF	SOT-23	C	$2.59
LTC2954CTS8-2#TRMPBF	SOT-23	C	$2.59	$1.83
LTC2954CTS8-2#TRPBF	SOT-23	C	$2.59	$1.81
LTC2954IDDB-1#PBF	3x2 DFN-8	I	$3.04
LTC2954IDDB-1#TRMPBF	3x2 DFN-8	I	$3.04	$2.18
LTC2954IDDB-1#TRPBF	3x2 DFN-8	I	$3.04	$2.16
LTC2954IDDB-2#PBF	3x2 DFN-8	I	$3.04
LTC2954IDDB-2#TRMPBF	3x2 DFN-8	I	$3.04	$2.18
LTC2954IDDB-2#TRPBF	3x2 DFN-8	I	$3.04	$2.16
LTC2954ITS8-1#PBF	SOT-23	I	$3.04
LTC2954ITS8-1#TRMPBF	SOT-23	I	$3.04	$2.18
LTC2954ITS8-1#TRPBF	SOT-23	I	$3.04	$2.16
LTC2954ITS8-2#PBF	SOT-23	I	$3.04
LTC2954ITS8-2#TRMPBF	SOT-23	I	$3.04	$2.18
LTC2954ITS8-2#TRPBF	SOT-23	I	$3.04	$2.16

Demo Boards


Part Number	Description	Price
DC1090A	LTC2954 \| Push Button On/Off Controller with uP Interrupt	$25.00