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300mA dual ULDO offers 'lowest' dropout

Posted: 22 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Micrel? ULDO? ultra-low dropout? voltage regulator? MIC5330?

Micrel Inc. has launched a new dual ultra-low dropout (ULDO) voltage linear regulatorthe MIC5330. The company said the device is part of a new family of dual LDOs offering ULDO voltage of 75mV at 300mA, 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, making it 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 (PMP) and PC cameras, Micrel said.

"Current requirements in today's portable equipment are on the rise as performance and functionality increase," noted Ralf Muenster, Micrel's director of marketing for Power Products. "Micrel's new MIC5330 with its exceptional thermal performance, diminutive size and high current capability, delivers an impressive 150mA/mm2 enabling small form factor designs. The device also offers the industry's lowest dropout for a 300mA dual LDO, allowing longer battery life and high PSRR under low input to output voltage conditions encountered when powering RF circuitry from a Li-Ion battery."

The company said the new device integrates two independently-controlled, high performance LDOs that offer exceptional transient performance while requiring only very small and inexpensive 1F ceramic capacitors. Both LDOs feature a low quiescent current of 75A per output, a fast turn-on time of 30sec, current limit and thermal shutdown protection, and can operate from -40C to 125C.

The IC is currently available in volume with pricing starting at 66 cents for 1,000 units.

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