Sunnyvale, Calif.—Advanced Analogic Technologies' AAT1149, in an 8-pin SC70JW package measuring just 2-by-2.1 mm, claims it's the smallest 400-mA step-down DC/DC converter.
"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," explained Bill Weiss, product line director. "By enabling the use of a 0603 footprint, 1 mm high inductor and coming in a SC70JW package, the AAT1149 delivers the power these applications need while setting new standards in solution size and power efficiency."
The (nonisolated) AAT1149, working from a 2.7- to 5.5 volt input, features an efficiency of up to 98 percent. Output voltage is programmable via external feedback resistors from 1 volt to VIN. No-load quiescent current is just 45 microamps. Its 3 MHz switching frequency allows designers the use of extremely small external components and keeps switching losses low.
The AAT1149 includes current-limit protection. An over-temperature protection circuit disables switching if internal dissipation becomes excessive. An integrated 70 microsecond soft-start feature limits current surge and eliminates output voltage overshoot at startup.
Click here for the product datasheet.
The AAT1149, in a Pb-free package and specified over -40 to +85°C, is priced at 87 cents each in 1k pieces.
AnalogicTech, 1-408-737-4600, www.analogictech.com