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LDO regulator designed for portable apps

Posted: 15 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:MIC5310? low dropout? LDO? voltage regulator? Micrel?

Micrel Inc. launched a new family of dual ultra-low dropout (LDO) voltage linear regulators. The MIC5310 is the first in a series of dual LDOs offering low dropout voltage of 35mV at 150mA, which is said to be more than 70db power supply ripple rejection (PSRR) and ultra low output noise. The part is offered in a 2-by-2mm, 8-pin leadless MLF package. The product suits portable applications, including cellphone RF power, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players and PC cameras. The IC is currently available in volume, with pricing starting at 60 cents for quantities of 1,000. Additional parts are expected to be launched throughout 2006.

"Today's portable applications continue to demand increasingly smaller solution sizes without compromising on specifications or performance," noted Ralf Muenster, Micrel's director of marketing for power products. "Micrel's new MIC5310 gives engineers advantages over solutions currently on the market, particularly in applications where maintaining high PSRR under low input voltage-to-output voltage conditions is crucial."

The MIC5310 integrates two independently-controlled LDOs while requiring 1F ceramic capacitors. Both LDOs feature a low quiescent current of 75A per output, a turn-on time of 30sec, current limit and thermal shutdown protection, and can operate from -40C to 125C.

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