Print  |  Send  |   

Synchronous buck converter delivers 90 percent efficiency

May 31, 2012 // Paul Buckley

Synchronous buck converter delivers 90 percent efficiency

Linear Technology has released a 65 V input-capable synchronous buck converter, which delivers up to 500 mA of continuous output current from a 16-lead thermally enhanced 3 mm x 5 mm DFN or MSOP package.


The device’s internal synchronous rectification topology delivers efficiencies as high as 90% and its Burst Mode operation requires 12 µA of quiescent current (at no load), maximizing battery run time. The LTC3630 operates from an input voltage range of 4 V to 65 V, making it suitable for a wide range of applications, including automotive, industrial, medical and avionics.

The LTC3630’s internal synchronous rectification and its programmable peak current limit design optimize efficiency while minimizing output ripple and external component size. Furthermore, output current can be programmed between 50 mA and 500 mA with a single resistor. The LTC3630’s output voltage can be adjusted with an external resistor divider to voltages from 0.8 V to VIN, or it can be easily programmed to deliver a fixed 1.8 V, 3.3 V or 5 V output with 1% accuracy. The combination of its 3 mm x 5 mm DFN package or thermally enhanced MSOP-16E and only three tiny externals offers a highly compact solution footprint for a wide array of general purpose applications.

The LTC3630 utilizes internal high side and low side power MOSFETs to ensure high efficiency in a very compact footprint. Additionally, the LTC3630 offers a precise run threshold and soft-start feature to ensure that system start-up is well controlled in any environment. Furthermore, a feedback comparator output enables multiple LTC3630s to be paralleled for higher current applications. Due to the inherent stability of the converter, no external compensation is required, thereby minimizing the solution footprint.

Availability and Pricing

Pricing for the LTC3630EDHC and the LTC3630EMSE starts at $3.20 each. Industrial grade versions, the LTC3630IDHC and LTC3630IMSE, are tested and guaranteed to operate over a -40 to 125°C operating junction temperature range and are priced at $3.55 each. Automotive grade versions, the LTC3630HDHC and LTC3630HMSE, are tested and guaranteed to operate from -40 to 150°C operating junction temperature and are priced at $3.80 each. Military Plastic grade versions, the LTC3630MPDHC and LTC3630MPMSE, are tested and guaranteed to operate over a -55 to 150°C operating junction temperature range and are priced at $10.72 each. All pricing is for 1,000-piece quantities and all versions are available from stock.

More information about the LTC3630 synchronous buck converter at
www.linear.com/product/LTC3630

All news

LEDs,Power components,MPUs/MCUs,LED lamps

Follow us

Fast, Accurate & Relevant for Design Engineers only!

Technical papers     

Filter Wizard     

Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.

Linear video channel

READER OFFER

Read 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...

Design centers     

Automotive
Infotainment Making HDTV in the car reliable and secure

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.

 

You must be logged in to view this page

Login here :