Micropower pushbutton on/off controller delivers automatic turn-on/off capabilities
March 08, 2012 // Paul Buckley
Linear Technology Corporation is introducing a pushbutton on/off controller that manages 1.5V to 36 V system power via a pushbutton interface or the presence of a supply. Unlike typical pushbutton controllers that initiate system power-ups only with the toggle of a pushbutton, the LTC2955 automatically turns on a system when power is applied from a primary or secondary supply, such as a wall adapter or car battery.
When powered up, the LTC2955 can power down a system via pushbutton and optionally can use interrupt logic to request a system power-down in menu-driven applications ('soft' shutdown), or automatically power-down a system if the supply is removed. Absolutely no code is required to configure the device. The LTC2955 is a simple, yet configurable, high voltage pushbutton controller that provides a common set of on/off power options.
The LTC2955's wide operating range of 1.5 V to 36 V caters to single cell, multicell and high voltage applications, including desktop and notebook computers, consumer electronics, portable instruments and automotive electronics. The robust pushbutton input handles wide voltage swings of up to ±36 V and ESD strikes up to ±25 kV, and is designed to operate in noisy environments. A mode select pin enables users to select automatic turn-on and turn-off combinations, and battery run time is maximized thanks to a low 1.2 µA quiescent current.
The LTC2955's power good output, interrupt output, and kill input provide simple interfacing with an optional microprocessor. In case a microprocessor fails to respond to an interrupt request, an adjustable turn-off timer enables users to set the required amount of time a pushbutton must be depressed in order to force a system power-down.
The LTC2955 is available in both positive (LTC2955-1) and negative (LTC2955-2) enable polarities, and in a 10-pin 3 mm x 2 mm DFN or 8-lead ThinSOT package.
Toshiba announces image sensor strategy
September 01, 2014
Toshiba Corp. has issued a press release detailing its strategy for the image sensor market.
DelfMEMS promotes CFO to CEO
Sensata to pay $1-bn for tire pressure sensor leader
ADCs for high dynamic range – successive-approximation or sigma-delta?
Microchip in Pursuit of CSR
Samsung Funds III-V FinFETs in US Lab
September 01, 2014
Samsung is funding Pennsylvania State University researchers working to fabricate III-V indium gallium arsenide FinFETs for ...
A question of Europe
Trinamic's stepper motor package gets you started
Winged parcel delivery: Google's way
- Power Modules: The New Super Power
- Flexible Performance for Network Security Appliances
- Digital Power Management Reduces Energy Costs While Improving System Performance
- Using RF Recording Techniques to Resolve Interference Problems
InterviewA question of Europe
Sir Peter Bonfield sits on the board and has advisory roles in many international companies and universities. With more than 45 years of experience in electronics, computers and communications, here he ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.