6MHz buck-boost DCDC convertor IC allows for smaller external components, wider battery voltage range

February 3, 2011
Figure 1. MB39C326 (2.15 × 1.94 mm)

Fujitsu Semiconductor Limited today announced the development of 6MHz buck-boost DCDC convertor IC "MB39C326" for radio frequency power amplifiers in mobile phones, smart phones, e-books and other handheld mobile devices. Sample shipments for the new IC product, MB39C306, will start from June 2011.

“MB39C326” operates at an industry-leading 6MHz as the buck-boost DCDC converter IC for radio frequency power amplifiers. The higher frequency operation of 6MHz can largely reduce the mounting area of the power supply part (half the ratio of existing products.)

Buck-boost operation makes it possible for Li-ion to operate at wider battery voltage range. “MB39C326” makes it possible to deliver stable voltages for the equipment and extend the life of Li-ion batteries, when the voltage of Li-ion batteries drops.

Mobile phones, , e-book and other handheld mobile devices are demanding higher performance with larger data transfer capacity, while aggressively miniaturizing components and board space. There is a strong push to reduce the overall size of RF amplifier without sacrificing stability and efficiency of its power supply. The passive inductor is one of the larger components requiring large space. With DCDC convertors switching at higher frequencies, inductor size can be reduced. Fujitsu Semiconductor’s DCDC convertor switches at 6MHz compared to conventional 2 to 3MHz, allowing a smaller inductor to be used and can be expected to reduce the overall board space of the power management circuits by half. Its buck boost operation switches automatically to extend the operating voltage of the lithium battery, while providing stable to the power amplifier.

Semiconductor will introduce the new buck-boost DCDC convertor, MB39C326, at the Mobile World Congress in Barcelona from 14th to 17th February 2011. Samples will be available in June 2011.

Explore further: First 100 V Fully Integrated Buck Bias Regulator for High-Voltage Systems

Related Stories

DOCOMO Develops 8-Band Power Amplifier for Mobile Phones

January 8, 2010

NTT DOCOMO announced today that it has developed a prototype multi-band power amplifier that accommodates eight frequency bands between 700 MHz and 2.5 GHz, paving the way for lightweight, all-in-one mobile phones capable ...

Recommended for you

Smart home heating and cooling

August 28, 2015

Smart temperature-control devices—such as thermostats that learn and adjust to pre-programmed temperatures—are poised to increase comfort and save energy in homes.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.