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
MEMS leaders under pressure, says Yole
July 31, 2014
The MEMS industry is changing as established leaders with manufacturing and an emphasis on delivering components are put ...
OLED lighting to be competitive with LEDs by 2016
Panasonic and Tesla Gigafactory battery plan forges ahead
Surface inspection tool can get customized
Wireless charging - a more cost-effective approach
Sony, Panasonic, Japan Display plan OLED joint venture
July 30, 2014
Sony Corp., Panasonic Corp., and Japan Display Inc. are working together to create a new company, to be named JOLED, which ...
Sony, TSMC win award for silicon-plastic process development
Sensor footprint evolution: Does size matter?
Memscap breaks even on rising Q2 revenue
- Building Blocks for the Internet of Things
- New Linear Regulators Solve Old Problems
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
InterviewCEO interview: China, not Apple, is way to go, says mCube CEO
Ben Lee, CEO of MEMS startup mCube, explains why he wants to spend $37 million on being a supplier of sensors to Chinese ODMs and avoiding a design win with Apple or Samsung.
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, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
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.