Fairchild Semiconductor’s Buck Converter Efficiently Powers High Capacity SD Flash Memory Applications
July 06 2010 - 11:01AM
Business Wire
As mobile handsets and other portable devices increase their
demand for memory storage, there is an emerging need to power
increasingly larger SD Flash Memory cards. To meet this
requirement, Fairchild Semiconductor (NYSE: FCS) developed the
FAN5362, a 3MHz 500mA synchronous Buck regulator, using a
proprietary architecture with synchronous rectification. The device
is ideal for cell phone designers who need to support high capacity
(e.g. 8, 16, 32GB, etc.) SD Flash Memory cards.
The nominal voltage level required for powering SD Flash Memory
is 2.9V. With a VIN of 3.6V and a VOUT of 2.9V, the FAN5362 is
capable of delivering a peak efficiency of 94 percent, while
maintaining over 86 percent efficiency at light load (1mA). Unlike
current LDOs which burn too much power, and typical Buck converters
which can’t gracefully handle low headroom conditions, the FAN5362
provides high efficiency and optimized control designed
specifically for low headroom operation.
Li-Ion batteries have an effective voltage range of 3.2 – 4.2V.
It is the lower end of the battery voltage range which creates the
low headroom application challenges. To prevent this, as the
battery approaches the lower end of its range, the FAN5362 is able
to transition seamlessly into and out of 100 percent duty cycle
operation. Even battery voltage level transients caused by GSM
pulses will not cause turmoil on the FAN5362’s output because the
FAN5362 is designed to respond with minimal under and
overshoot.
The FAN5362 works in conjunction with small input/output
capacitors and 0805 multi-layer chip inductors. Compatibility with
these passive components allows system designers to pick chip
inductors and capacitors that consume less board space at a lower
cost, resulting in smaller and more affordable end applications.
This DC/DC converter is packaged in a 0.96 X 1.31mm WL-CSP package
with a sleek, low profile of 0.6mm, conserving board space for
these space-constrained applications.
While targeted towards 2.9V SD Flash Memory, the FAN5362 is also
available in other fixed output voltage options ranging from 1.8 –
3.6V. This easy-to-design solution supports the quick design cycles
found in the mobile device market, making it an ideal choice for
cell phones, tablets, eBooks, PMPs, DSCs, GPS and lithium-ion
portables.
The FAN5362 is another example of Fairchild’s broad solutions
that extend battery life and conserve board space in portable and
consumer designs. With a substantial portfolio of analog and power
IP, along with system-level expertise, Fairchild develops solutions
that define both user satisfaction and market success.
Price: US$.49 in 1,000 piece quantities
Availability: samples available now
Delivery: 12 weeks ARO
Contact Information:
To contact Fairchild Semiconductor about this product, please go
to: http://www.fairchildsemi.com/cf/sales_contacts/.
For information on other products, design tools and sales
contacts, please visit: http://www.fairchildsemi.com.
Note to Editor: For a datasheet in PDF format, please go
to:
http://www.fairchildsemi.com/ds/FA/FAN5362.pdf
About Fairchild Semiconductor:
Fairchild Semiconductor (NYSE: FCS) – global presence, local
support, smart ideas. Fairchild delivers energy-efficient,
easy-to-use and value-added semiconductor solutions for power and
mobile designs. We help our customers differentiate their products
and solve difficult technical challenges with our expertise in
power and signal path products. Please contact us on the web at
www.fairchildsemi.com.
Follow us on Twitter @ http://twitter.com/FairchildSemi
View product and company videos, listen to podcasts and comment
on our blog @
http://www.fairchildsemi.com/engineeringconnections
Visit us on Facebook @
http://www.facebook.com/FairchildSemiconductor
Fairchild Semiconductor (NASDAQ:FCS)
Historical Stock Chart
From Jun 2024 to Jul 2024
Fairchild Semiconductor (NASDAQ:FCS)
Historical Stock Chart
From Jul 2023 to Jul 2024