Our website uses cookies to improve your user experience. If you continue browsing, we assume that you consent to our use of cookies. More information can be found in our Privacy & Cookies Policy

Skip to content

The Student Engineer
JOBS
Advanced Manufacturing
Awards
2018 Salary Survey
Latest Issue
Newsletter Signup

News
In-depth
Opinion
Sectors
Careers
Supplier Network

Search Login / Register Primary Menu

Close

Email

Password

or Register

Supplier Network +Add your company

Supplier Product

Back to previous

Circuit protection devices

DC/DC controller eliminates external surge protection devices

Contact Supplier

By Linear Technology now part of Analog Devices on 26th May 201615th July 2016

Product Details Supplier Info More products

Linear Technology Corporation announces the LTC3895, a high voltage non-isolated synchronous step-down switching regulator controller that drives an all N-channel MOSFET power stage. Its 4V to 140V (150V abs max) input voltage range is designed to operate from a high input voltage source or from an input that has high voltage surges, eliminating the need for external surge suppression devices. The LTC3895 continues to operate at up to 100% duty cycle during input voltage dips down to 4V, making it well suited for transportation, industrial control, robotic and datacom applications.

The output voltage can be set from 0.8V to 60V at output currents up to 20amps with efficiencies as high as 96%. This part draws only 40µA in sleep mode with the output voltage in regulation, ideal for always-on systems. An internal charge pump allows for 100% duty cycle operation in dropout, a useful feature when powered from a battery during discharge. The LTC3895’s powerful 1Ω N-channel MOSFET gate drivers can be adjusted from 5V to 10V to enable the use of logic- or standard-level MOSFETs to maximize efficiency. To prevent high on-chip power dissipation in high input voltage applications, the LTC3895 includes an NDRV pin which drives the gate of an optional external N-channel MOSFET acting as a low dropout linear regulator to supply IC power. The EXT_VCC pin permits the LTC3895 to be powered from the output of the switching regulator or other available source, reducing power dissipation and improving efficiency.

The LTC3895 operates with a selectable fixed frequency between 50kHz and 900kHz and is synchronizable to an external clock from 75kHz to 850kHz. The user can select from forced continuous operation, pulse-skipping or low ripple Burst Mode operation during light loads. Its current mode architecture provides easy loop compensation, fast transient response and excellent line regulation. Current sensing is accomplished by measuring the voltage drop across the output inductor (DCR) for highest efficiency or by using an optional sense resistor. A low 80ns minimum on-time allows for high step-down ratios at high switching frequency. Current foldback limits MOSFET heat dissipation during overload conditions. Additional features include a fixed 5V or 3.3V output option, integrated bootstrap diode, a power good output signal, adjustable input overvoltage lockout and soft-start.

The LTC3895 is available in a TSSOP-38 thermally enhanced package with several pins removed for high voltage spacing. Two operating junction temperature grades are available with extended and industrial versions from –40 to 125°C and a high temp automotive version from –40°C to 150°C. The 1,000-piece price starts at $4.70 each.

Linear Technology now part of Analog Devices

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

Contact Supplier Visit our website 01628 477066

About Analog Devices
Analog Devices (NASDAQ: ADI) 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. Visit http://www.analog.com

View full profile

Gas sensors Measurement, quality control and test Process and environmental testing

Analog unveils industry’s most advanced biological and chemical sensing interface IC

3rd July 2018 3:12 pm 3rd July 2018 3:12 pm

Measurement, quality control and test Process and environmental testing

Analog Devices’ integrated optical module reduces smoke detector false alarms

29th June 2018 2:41 pm 29th June 2018 2:41 pm

Electrical and electronic components

Analog’s enhanced A2B transceivers deliver unparalleled flexibility for emerging applications

27th June 2018 2:58 pm 27th June 2018 3:25 pm

Electrical and electronic components

Analog’s new step-down 150°C, FMEA compliant pinout, 40V, 2.5A µModule regulator

21st June 2018 4:10 pm 21st June 2018 4:11 pm

Electrical and electronic components

Ultralow jitter clock generation (4.5GHz) and clock distribution (7.5GHz) family

21st June 2018 3:30 pm 21st June 2018 3:30 pm

Electrical and electronic components

Analog Devices’ Rugged RS485 Transceiver Delivers in Extreme Temperature & High Noise Environments

19th June 2018 2:26 pm 19th June 2018 2:26 pm

Explore

Supplier Network
JOBS
SECTORS
SKILLS AND CAREERS
POLICY & BUSINESS
THE STUDENT ENGINEER
ARCHIVE
SALARY CALCULATOR
SALARY SURVEY 2018
C2I 2017
THE ENGINEER 160
VIDEOS
WEBINARS
BACK ISSUES
160 SPECIAL
LATEST ISSUE
Advertising – Display and Supplier Network
EVENTS
NEWSLETTER SIGNUP

Twitter

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

© 2018. All rights reserved.

built by interconnect/it

Centaur Communications Ltd (a member of the Centaur Media plc group)

Wells Point, 79 Wells Street, London W1T 3QN. Registered in England No: 1595235