Step-down DC/DC converter with 150°C maximum junction temperature
July 02, 2010 // Christoph Hammerschmidt
Linear Technology announces the H-Grade version of the LT3686. Besides operating under rough environmental conditions, the step-down switching regulator is also designed to work under cold-crank conditions.
The LT3686H is a 1.2A, 37VIN step-down switching regulator. It operates within a VIN range of 3.6V to 37V with overvoltage lockout, protecting the regulator and load from transients as high as 55V, making it suitable for load dump and cold-crank conditions commonly found in automotive applications as well as 24V industrial supplies.
Its internal 1.85A switch can deliver up to 1.2A of continuous output current at voltages as low as 0.8V. The LT3686H's switching frequency is user programmable from 300kHz to 2.5MHz, enabling designers to maximize efficiency while avoiding critical noise-sensitive frequency bands. Its low minimum on-time enables it to provide high switching frequencies even with high step-down ratios. For example, with an input as high as 16V, it can deliver a 3.3V output using a 2MHz switching frequency. The LT3686H also uses a unique design, which ensures that it maintains constant frequency switching, even in very light load conditions. The device's 3mm x 3mm DFN-10 package and high switching frequency, which keeps the external inductor and capacitors small, provides a compact, thermally efficient footprint.
The H-grade version operates up to a junction temperature of 150°C, compared to the E and I grade versions' 125°C maximum junction temperature. All electrical specifications are identical for the E, I and H grade versions. The H-grade versions are tested and guaranteed to the maximum junction temperature of 150°C, making them ideal for automotive and industrial applications which are subjected to high ambient temperatures.Pricing for the LT3686HDD starts at $3.03 each in 1,000-piece quantities and is available from stock. For more information, visit www.linear.com/pr/3686. All news
Calibration: meeting the challenges of high-frequency power measurement
October 13, 2015
As more and more innovation focuses on energy efficiency and the use of renewable energy resources, engineers are increasingly ...
Volkswagen cuts R&D spending to face lawsuits
Video: Singapore Post trials drone mail delivery
Bosch drives development of both batteries and fuel cells
Silicon Europe grows to cover 12 regions
More-than-Moore will lead, argues GloFo's Wijburg
October 13, 2015
At the opening press conference for the Semicon Europa exhibition being held here in Dresden Germany Rutger Wijburg, senior ...
Startup pitch-fest opens Semicon Europa show
MEMS, sensors get four sessions at IEDM 2015
Image sensors get seven papers at IEDM 2015
- Determine Balancing Current for the LTC3305 Lead-Acid Battery Balancer
- 3 Ways to Simplify Medical Device Testing
- Thread Networking Protocol Simplifies Connecting “Things” in the Home and Beyond
- High Voltage CMOS Amplifier Enables High Impedance Sensing with a Single IC
InterviewMEMS platforms are way to go, says Bosch's Finkbeiner
In the two years since we last interviewed Stefan Finkbeiner, CEO of Bosch Sensortec, the company has taken over from STMicroelectronics as the leading global supplier of MEMS components. Here he explains ...
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, LabNation is giving away three of its SmartScope open source USB oscilloscopes, worth 229 Euros each, for EETimes Europe's readers to win.
Successfully funded through Kickstarter last year, the SmartScope is claimed to be the world's first test equipment designed to run on multiple operating systems and platforms such as smartphones, tablets and PCs. It is powered directly from... 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.