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Micrel's dual LDOs deliver low-dropout, high-PSRR edge

Posted: 12 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Vince Biancomano? Micrel? MIC5310? LDO regulator?

Micrel's MIC5310 is the company's first in a series of dual LDO regulators offering ultra low dropout voltage (35mV at 150mA), greater than 70db power supply ripple rejection (PSRR), and ultra low output noise.

Housed in a 2-by-2mm, 8-pin leadless MLF package, this new device is suitable for today's demanding portable applications, including cellular phone RF power, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players and PC cameras.

"Today's portable applications continue to demand increasingly smaller solution sizes without compromising on specifications or performance," said Ralf Muenster, director of marketing for power products at Micrel. "Our new MIC5310 gives engineers significant 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, high performance LDOs that offer fast transient performance. According to Micrel, just three or four small external capacitors (1F or less) are required in a typical application. Both LDOs feature a quiescent current of 75A per output, turn-on time of 30s, current limit and thermal shutdown protection, and operation over -40C to 125C.

The MIC5310 is currently available in volume orders, with prices starting at 60 cents each in 1,000-unit quantities.

- Vince Biancomano

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