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  7. Fujitsu Semiconductor 6MHz buck-boost DCDC convertor IC allows for smaller external components and wider battery voltage range

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

Fujitsu Semiconductor (Shanghai) Company Limited

Shang Hai, February 24, 2011

Fujitsu Semiconductor (Shanghai) Co., Ltd. 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 battery 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.

0224

MB39C326 (2.15×1.94mm)

Larger View (81 KB)

Mobile phones, smart 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 power supply to the power amplifier.

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

Sample Price and Release Schedule

Product Price Sample release schedule
MB39C326 4 USD From June 2011

Sales Target

0.8 million units/month from 2011 (Mass-product)

Features of MB39C326

  1. Smaller inductor can be used with switching frequency of 6MHz hence reducing surface area occupied by the power circuit
    Compared to conventional DCDC convertors which switch at around 2 t o 3MHz, smaller size inductors can be used with Fujitsu Semiconductor’s 6MHz DCDC convertor. The reduction of space consumed by the inductor can cut the overall surface area occupied by the power supply by half. This is critical for mobile devices where space is critical.
  2. Buck Boost operation makes it possible for Li-ion battery to operate at lower voltage
    The operating voltage of Li-ion battery drops as it discharges during use to a certain level at which it cannot supply enough power to drive the devices it is connected to. It is necessary to boost the output voltage level to the required level of the devices to continue to deliver power to the devices it is driving. Fujitsu’s buck-boost convertor is able to extend the usage of battery by pumping up the output voltage level, hence allowing sufficient power to continue operation. As such, a large amount of data can still be transferred through the power amplifier even when battery voltage is low, resulting in more efficient use of remaining charges in the battery.
  3. High-efficiency power supply
    The new effective controller is designed using low gate charge process technology which reduces switching loss and consumption power. Higher efficiency is realized in this improved buck boost DCDC convertor.

MAIN FEATURES

  • 6MHz PWM operation allows 0.5uH small inductor
  • Automatic transition between buck mode and boost mode
  • Built in internal FETs
  • Power-Save Mode for improved efficiency at light load current
  • Input Voltage range: 3.1V to 4.6V
  • Adjustable output voltage range: 0.6V to 4.2 V
  • Output current of 800mA
  • Over temperature protection
  • Input under voltage lock out
  • 20pin 0.4mm-ball-pitch 2.15mm×1.94mm WL-CSP (wafer level chip size package)
  • Operating temperature range of -40℃ to +85℃

About Fujitsu Semiconductor (Shanghai) Co.,Ltd.

Fujitsu Semiconductor (Shanghai) Co., Ltd. was established in August 2003 as Fujitsu’s semiconductor business representative in China. Headquartered in Shanghai, it has branch offices in Beijing, Shenzhen and Dalian to provide sales and service support to customers throughout China.
Fujitsu Semiconductor (Shanghai) Co., Ltd. offers an extensive range of products from microcontroller, application-specific integrated circuit (ASIC), application-specific standard product (ASSP), system-on-chip (SoC) to system memory, that can be supplied as product or complete solution. With technology resource centres and ASIC design support centres strategically located in Hong Kong , Shanghai, Taiwan and Chengdu, as well as Heavy investments in design and engineering capabilities and application support resources, complemented by a regional network of design partners, suppliers and distributors, Fujitsu Semiconductor (Shanghai) Co., Ltd. can readily delivers innovative and value-added solutions and varied range of products to its target markets in China.
For more information, please see: http://www.fujitsu.com/cn/en/about/local/subsidiaries/fsp/about/

Marketing:William Wang

Phone: Phone: +86 21-6146-3688
Fax: +86 21-6335-1610
E-mail: E-mail: William.Wang@cn.fujitsu.com
Company:Fujitsu Semiconductor (Shanghai) Co., Ltd.

Corporate Planning & Communications:Cao Miao

Phone: Phone: +86 21-6146-3688
Fax: +86 21-6335-1610
E-mail: E-mail: Marcom.sh@cn.fujitsu.com
Company:Fujitsu Semiconductor (Shanghai) Co., Ltd.


Company and product names mentioned herein are trademarks or registered trademarks of their respective companies. Information provided in this press release is accurate at time of publication and subject to change without advance notice.

Date: 24 February, 2011
City: Shang Hai
Company: Fujitsu Semiconductor (Shanghai) Co., Ltd.

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