Product category:
DC/DC Convertors
News Release from: Emerson Network Power - Embedded Power | Subject: SMT12F
Edited by the Electronicstalk Editorial
Team on 16 March 2004
Compact POL convertor puts power where
it's needed
The SMT12F is an ultracompact 12A nonisolated point-of-load DC/DC convertor module with a footprint of just 13.5 x 16mm, yielding a power density figure in excess of 23W/cm3.
The SMT12F is an ultracompact 12A nonisolated point-of-load DC/DC convertor module with a footprint of just 13.5 x 16mm, yielding a power density figure in excess of 23W/cm3 Its very low installed height of just 7.9mm minimises disruption of airflow and makes it suitable for both forced air and convection cooled environments
This article was originally published on Electronicstalk on 4 Feb 2000 at 8.00am (UK)
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The SMT12F convertor accommodates a wide operational temperature range of -40 to +85C ambient and is intended for use in communications applications like enterprise routers, storage switches and wireless base stations.
Based around a highly advanced monolithic silicon controller, the SMT12F uses a synchronous buck regulator topology and a high 600kHz switching frequency to achieve a typical conversion efficiency of 95% at 5V in, 3.3V out.
This very high efficiency results in an exceptionally low internal power dissipation of less than 2W at full output, maximising useable power and reliability, and allows the module to be placed immediately adjacent to the load without raising any thermal design concerns.
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The convertor module employs a single board construction that simplifies thermal management and helps keep the weight down to just 3g.
A key advantage of the SMT12F is that it needs the addition of only five 22uF ceramic output capacitors to provide a complete full-specification, high efficiency POL solution with transient response capabilities that extend to 200A/us.
The total board space required for the module and capacitors is a mere 300mm2, facilitating easy colocation with the load.
Competing options on the market today - including discrete implementations and multichip components - still require the addition of input and output capacitors as well as considerable board space for high-value tantalum reservoir capacitors and the output inductor.
The highly integrated nature of the SMT12F module means that it occupies less than 20% of the space that may be demanded by alternative solutions.
The SMT12F POL convertor has a wide input voltage range of 3.0 to 5.5V, enabling it to accommodate a diversity of DC supply sources, including those used in systems employing intermediate bus architectures.
The convertor has a 12A output capability and a very wide output voltage trim range of 0.9 to 3.3V, providing designers with considerable flexibility for addressing different low-voltage silicon supply needs with the one module.
The SMT12F's output voltage is set via a single resistor and requires no external reference when generating output voltages as low as 0.9V.
It also has a true monotonic startup characteristic.
Artesyn's SMT12F POL convertors feature remote sense, remote on/off and voltage margining facilities as standard, as well as a "power good" output signal.
They have no minimum load requirement, and are comprehensively protected against overtemperature and short-circuit conditions, with auto-recovery.
The convertors carry a full set of international safety approvals, including EN60950 (TUV Product Service) and UL/cUL60950.
The SMT12F fast-transient POL convertors are the latest additions to Artesyn's rapidly expanding Typhoon family of high-performance DC/DC board-mounted power conversion products.
The company is also developing a sister product with 12V input to support IBA based designs (intermediate bus architecture).
Future fast-transient POL convertors will integrate all the capacitance needed on the one module, and are aimed specifically at ultradense high-functionality designs that demand exceptionally fast transient response capabilities to power advanced silicon loads including network processors, DSPs and FPGAs.
The modules are designed for surface mounting and are available in 40 piece tray carriers.
Tape-and-reel options will be available for customers wishing to use standard placement automation.
Sample quantities of Artesyn's SMT12F POL convertors are available for immediate delivery.
In OEM quantities of 1000, unit prices are US $16.13.
Standard lead-time is stock to 8-12 weeks.
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