Datasheet Linear Technology LTC2953-2

Manufacturer	Linear Technology
Series	LTC2953-2

Push Button On/Off Controller with Voltage Monitoring

Datasheets

PDF, 214 Kb, File uploaded: Oct 25, 2017

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Prices

Packaging

	LTC2953CDD-2#PBF	LTC2953CDD-2#TRPBF	LTC2953IDD-2#PBF	LTC2953IDD-2#TRPBF
N	1	2	3	4
Package	3x3 DFN-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing	3x3 DFN-12 Package Outline Drawing
Package Code	DD	DD	DD	DD
Package Index	05-08-1725	05-08-1725	05-08-1725	05-08-1725
Pin Count	12	12	12	12

Parametrics

Parameters / Models	LTC2953CDD-2#PBF	LTC2953CDD-2#TRPBF	LTC2953IDD-2#PBF	LTC2953IDD-2#TRPBF
Demo Boards	DC1099A	DC1099A	DC1099A	DC1099A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
ESD, kV	10	10	10	10
Export Control	no	no	no	no
Features	Pushbutton, Supervisor	Pushbutton, Supervisor	Pushbutton, Supervisor	Pushbutton, Supervisor
Isupply, µA	14	14	14	14
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Supply Voltage Range	2.7V to 27V	2.7V to 27V	2.7V to 27V	2.7V to 27V

Eco Plan

	LTC2953CDD-2#PBF	LTC2953CDD-2#TRPBF	LTC2953IDD-2#PBF	LTC2953IDD-2#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Other Options

Design Notes

Download
Pushbutton On/Off Controller with Failsafe Voltage Monitoring &mdash DN427
PDF, 90 Kb, File published: Oct 5, 2007
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Pushbutton On/Off Controller with Failsafe Voltage Monitoring
Design Note 427
Victor Fleury
Introduction
Have you had the exasperating experience of a laptop or
PDA deп¬Ѓantly not responding to your commands? You
frantically press key after key, but to no avail. As hope
turns to anger (but just before you throw the companyвЂ™s
laptop through the window) you slam your п¬Ѓnger against
the on/off power button. Ten seconds later, your laptop
п¬Ѓnally surrenders and the screen goes black in a high
pitched whimper. enables a DC/DC converter or turns on a power switch.
These circuits communicate with system logic to make
sure that power turns on and turns off in an orderly
manner. Additionally, failsafe features should disable
system power if there is a problem with either the input or
output power supply. The pushbutton monitor must also
be rugged: absorb high levels of electrostatic discharge,
tolerate voltage transients below ground and operate at
high voltage levels. The unresponsive pushbutton was likely the result of an
unresponsive ОјP or system logicвЂ”as evidenced by the
crash. By pressing and holding the on/off pushbutton,
the LTC2953 provides the user with the ability to force …

Articles

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Pushbutton On/Off Controller Provides uProcessor Reset Monitor and Input Supply Monitoring &mdash LT Journal
PDF, 297 Kb, File published: Oct 16, 2007
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DESIGN FEATURESвЂ‰L Pushbutton On/Off Controller Provides
ВµProcessor Reset Monitor and Input
by Victor Fleury
Supply Monitoring
Introduction
System designers often grapple with
ways to debounce and control the
on/off pushbutton of portable devices.
Traditional debounce designs use
discrete logic, flip-flops, resistors and
capacitors. Some designs require an
onboard microprocessor to monitor the
pushbutton, but this puts a burden on
the microprocessorвЂ”if it hangs up, all
device on/off control is lost. Also, in
high voltage, multicell battery applications the low voltage circuits require
an LDO power supply. In the end,
what should be a simple monitoring
circuit consumes an oversized share
of the space and complexity of the
system. Plus, its draw on the power
budget is high even when the system
is off, since the microprocessor must …

Model Line

Series: LTC2953-2 (4)

LTC2953CDD-2#PBF LTC2953CDD-2#TRPBF LTC2953IDD-2#PBF LTC2953IDD-2#TRPBF

Manufacturer's Classification

Monitor, Control and Protection > Pushbutton Controllers
Monitor, Control and Protection > Supervisory Circuits > Single Supply Monitors

EMS supplier

Slices

Microcontrollers