Fujitsu Launches Industry's First High-Efficiency Single-Chip Power Management IC for Ultra-Mobile PCs

    Supports 2008 Version of Low-Power Intel Architecture Platform,
    Substantially Reduces Board Area of Power Management

    SUNNYVALE, Calif., Sept. 20 /CNW/ -- Fujitsu Microelectronics America,
Inc. (FMA) today announced the development of a one-chip system power
management IC for ultra-mobile PCs (UMPCs). The new device, the MB39C308, is
designed to supply power to the system, memory, and chipsets in UMPCs. Sample
shipments will begin in November 2007.
    As an industry first for one-chip integration, the MB39C308 complies with
the upcoming version of the Low Power Intel Architecture (LPIA) specification
proposed by Intel Corporation as a low-power platform for UMPCs. The MB39C308
also meets the next-generation LPIA platform requirement of a six-channel
DC/DC converter control circuit, while integrating other peripheral components
onto the chip. This enables the power management system to be reduced to less
than one-third the size of other similar products. The increased efficiency of
the new device's power supply is a major factor in extending the operating
time of the UMPC battery.
    The MB39C308 was jointly developed with Fujitsu VLSI Limited, utilizing
Laterally Diffused MOS (LDMOS) technology. By using an LDMOS technology and
revising the transistor structure, the MB39C308 supplies power from a
lithium-ion battery at high-efficiency rates without dispersion. The DC/DC
converter control circuits incorporated in the chip generate voltages across
six different channels and support power for memory, the chipset and external
systems such as wireless LAN, as required in the 2008 version of the LPIA
    Also, a switching FET integrated in the MB39C308 can drive a current of
1.5 Amps to 3.5 Amps.  This benefits the memory and chipset, reducing the
number of peripheral components and the size of the power management system.
In addition, by optimizing components to comply with the LPIA platform and
embedding them into the power management IC, it becomes possible to eliminate
the requirement to set voltage or current when designing power management
    "Ultra-compact mobile PCs can run the same operating system as
regular-sized PCs. UMPCs were launched in 2006, and we forecast the market
will reach five million units in 2008," said Davy Yoshida, director of
Business Development of Fujitsu Microelectronics America.
    "For these UMPCs, it is necessary to supply differing voltages to the
processor, chipset memory, and other parts. To extend the operating time of
the battery, processor consumption must be reduced and power management ICs
are required in order to reduce power supply system size, including control
circuits that can supply a large current with high efficiency from a lithium
ion battery," Yoshida said.
    Sample Pricing and Availability
    Samples of the MB39C308, packaged in 208-pin BGAs, will be available in
November with prices starting at $9 each.

    Specifications of the MB39C308

    Power Supply Voltage                   5.5V~12.6V
    Topology                               Current Mode (1) 6 Channel (ch)
                                            voltage down conversion
    Power Frequency                        700KHz((20%) fixed
    Output Precision (2)                    (5.0% (transient response
                                            included (3)
    Output Voltage Preset                  Ch1: 5.0V Ch2: 3.3V Ch3: 1.8V/1.5V
                                            Ch4: 0.9V/0.75V
                                            Ch5: 1.5V Ch6: 1.1V/1.05V
    Digital Software Start/Stop (4)        1.7msec ~ 9msec variation
    Power Good Function (5)                Ch1 ~ Ch6
                                            Ch3 ~ Ch6 (memory, chipset)
                                            all power good
                                            function embedded
    Protection Function                    UVLO/OCP/OVP/OTP/SCP/IVP (6)
    Operating Temperature Range            -30 degrees C ~ 85 degrees C
    Package                                Plastic BGA-208 pin

    (1) Current Mode: DC/DC control format with current feedback.
    (2) Power Supply Precision: Precision shown is with Fujitsu's evaluation
        board and evaluation conditions.
    (3) Transient Response: Output voltage change corresponding to an output
        current change.
    (4) Digital Software Start/Stop: a function to start and stop the output
        voltage, that doesn't depend on the output current, by using a digital
        counter internally in the LSI.
    (5) Power Good Function: when the output voltage is 90%~110% of the set
        value, it outputs a signal.
    (6) UVLO/OCP/OVP/OTP/SCP/IVP: Under Voltage Lockout / Over Current
        Protection / Output Over Voltage Protection / Over Temperature
        Protection / Short-Circuit Protection / Input Over Voltage Protection.
    About Fujitsu Microelectronics America
    Fujitsu Microelectronics America, Inc. (FMA) leads the industry in
innovation. FMA provides high-quality, reliable semiconductor products and
services for the networking, communications, automotive, security and other
markets throughout North and South America. For more information about the
product, please see
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For further information:

For further information: Emi Igarashi of Fujitsu Microelectronics, Inc.,
 +1-408-737-5647,; or Dick Davies of Independent 
Public Relations Associates, +1-415-652-7515,, for 
Fujitsu Microelectronics America, Inc. Web Site:

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