ULDO is a tight fit for wireless designs

San Jose, Calif.&#8212Micrel's MIC5301 ULDO regulator touts a dropout of just 40 mV at 150 mA, more than 75 db PSRR, and extremely low output noise, all in a 1.6-by-1.6 mm MLF package that ideally suits the device to cellular phones, RF power, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players and PC cameras.

“As battery voltages continue to drop in the vast majority of consumer products, maintaining high PSRR can present quite a challenge for designers,” said Ralf Muenster, director of marketing for power products.
“Micrel overcomes this by offering extremely low dropout….” in a chip occupying just 36 percent of the footprint taken by an SC-70 package.

Indeed, Micrel claims the chip's dropout voltage is the industry's lowest for a single-output 150 mA LDO, thus extending battery life for Li-ion powered devices. The chip also features a bypass pin that allows designers additional noise filtering for even higher PSRR.

Other features include fast transient response (only one small ceramic capacitor required), low quiescent current, fast turn-on time (30 microseconds), and current-limit and thermal-shutdown protection. The chip is rated for operation over -40 to +125&degC.

Click here for the product datasheet. The MIC5301 is priced starting at 45 cents in 1k quantities.

Micrel , 1-408-944-0800,

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