Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT1149
Edited by the Electronicstalk Editorial
Team on 03 January 2007
Convertor works with smallest passives
Step-down convertor enables the use of the industry's latest 0603 footprint, 1mm high inductors for the smallest possible total solution size.
Developed with space-constrained portable applications in mind, AnalogicTech's AAT1149 high performance, fast transient, 400mA step-down convertor enables the use of the industry's latest 0603 footprint, 1mm high inductors for the smallest possible total solution size Developers of mobile handsets and modules for new smart phone applications, such as Digital Media Broadcast (DMB) and Digital Video Broadcast (DVB), strive to drive down system thickness and footprint
This article was originally published on Electronicstalk on 14 Mar 2008 at 8.00am (UK)
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By enabling the use of a 0603 footprint 1mm high inductor, and coming in a small, 2.0 x 2.1mm SC70JW package, the AAT1149 delivers the power these applications need while setting new standards in solution size and power efficiency.
The AAT1149 delivers 400mA of load current from an input range of 2.7 to 5.5V.
Output voltage is programmable via external feedback resistors from 1.0V to the input level.
The step-down convertor achieves up to a high 98% efficiency.
No load quiescent current is only 45uA.
The 3MHz switching frequency allows the use of extremely small external components and keeps switching losses low.
To prevent damage during overload conditions, the AAT1149 adds current limit protection.
An over temperature protection circuit disables switching if internal dissipation becomes excessive.
An integrated 70us soft start feature limits current surge and eliminates output voltage overshoot at startup.
Specified over the -40 to +85C temperature range, the AAT1149 is available in a Pb-free, 8-pin SC70JW package that measures only 2.0 x 2.1mm.
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