Skip to content

The Student Engineer
C2I Awards
Salary Survey
Latest Issue
Newsletter Signup
Employer Zone
Covid-19

News
In-depth
Opinion
JOBS
Sectors
Supplier Network

Search Login / Register Primary Menu

Close

Login or Register

Supplier Network +Add your company

Supplier Product

Back to previous

Electrical and electronic components

Dual-input prioritizer provides low quiescent current backup

By Analog Devices incorporates Linear Technology on 15th September 2017

Product Details Supplier Info More products

Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LTC4418, a dual input power prioritizer for 2.5V to 40V systems. To enable portability, preserve memory during brownouts, and ensure a graceful shutdown on power loss, electronic systems employ batteries and capacitors for backup power. The LTC4418 normally powers the load from the higher priority main supply such as a wall adapter or main battery, switching to the backup supply—typically a battery or large value capacitor—during primary brownout or power loss conditions. With up to 40V operating capability, the LTC4418 accommodates a wide range of power sources such as wall adapters, USB ports, supercapacitors, and multicell lead-acid, Li-Ion, or NiMH batteries. A low 26µA operating quiescent current and a shutdown mode make the LTC4418 ideal for portable battery-operated systems.

Unlike diode-based solutions, the LTC4418 does not require the backup supply voltage to be lower than the main voltage. External back-to-back P-channel MOSFET switches multiplex from the primary to the backup input when the primary goes out of the valid voltage window setup with adjustable and precise undervoltage and overvoltage thresholds. Carefully designed break-before-make fast switch control blocks reverse and cross conduction currents while minimizing output voltage droop. An external capacitor sets the time that a supply needs to stay within its voltage window before being considered valid. Reversed input voltages up to −42V are blocked, protecting the load.

More than two supplies are prioritized by cascading any combination of LTC4418 and the triple-supply LTC4417. Specified over the 0°C to 70°C commercial and −40°C to 85°C industrial temperature ranges, the LTC4418 is offered in a 20-lead 4mm x 4mm QFN package. 1,000-piece pricing starts at $2.45 each.

Analog Devices incorporates Linear Technology

Analog Devices (NASDAQ: ADI) is a leading global high-performance analogue technology company dedicated to solving the toughest engineering challenges.

Visit our website 01932 358530

Analog Devices is the leading global high-performance analog technology company dedicated to solving the toughest engineering challenges. We enable our customers to interpret the world around us by intelligently bridging the physical and digital with unmatched technologies that sense, measure, power, connect and interpret. We create innovative solutions to solve design challenges in instrumentation, automation, communications, healthcare, automotive and numerous other industries. The company is a global leader in the design and manufacturing of analog, mixed signal, and DSP integrated circuits to help solve the toughest engineering challenges. Visit http://www.analog.com.

View full profile

Electrical and electronic components

Analog Devices Announces 16-Channel, Mixed-Signal Front-End Digitizer for Reference Design Integration

13th April 2021 12:05 pm 13th April 2021 12:05 pm

Electrical and electronic components

Independent Research Surveys Manufacturing Executives: Real-time Data from Connected Factory is Key to Driving Innovation and Delivering Competitive Advantages

8th April 2021 10:11 am 8th April 2021 10:11 am

Electrical and electronic components

Analog Devices Announces Complete Radio Platform for 5G O-RAN Ecosystem

25th March 2021 4:58 pm 25th March 2021 4:58 pm

Electrical and electronic components

Analog Devices and Arrow Announce Next Monthly Pan-European Webinar to be held on 31st March at 2.00pm (3.00pm CET)

18th March 2021 11:42 am 18th March 2021 11:42 am

Electrical and electronic components

Analog Devices, University of Limerick and Stripe Collaborate to Leverage Software Technology for the Transformation of Engineering Education

3rd March 2021 11:06 am 3rd March 2021 11:06 am

Electrical and electronic components

Analog Devices’ Battery Management System ICs and Automotive Audio Bus Power Volvo’s All Electric XC40 SUV

24th February 2021 10:16 am 24th February 2021 10:30 am

Explore

SECTORS
CAREERS
SKILLS AND CAREERS
POLICY & BUSINESS
VIDEOS
EVENTS
WEBINARS
CLASSIC ARCHIVE
C2I 2020 Winners Book
BACK ISSUES
NEWSLETTER SIGNUP
TECH TRENDS 2021

Twitter
LinkedIn
Instagram
Flip

Advertise
Contact us
Cookies
Digital edition
Magazine subscription
Privacy
Website Terms and Conditions

Copyright © Mark Allen Engineering Ltd (a Mark Allen Group company) 2019

Mark Allen Engineering Limited
Registered Office: Mark Allen Group, St Jude's Church, Dulwich Road, London, SE24 0PB
Registered in England No. 11569365