San Jose, Calif.—Micrel's new family of dual ULDOs, with the MIC5320 and the MIC5321 as the first members, feature a dropout of just 35 mV at 150 mA, a PSRR of at least 65-75 db and very low output noise—all in one of the industry's smallest packages, the (1.6-by-1.6 mm) 6-pin MLF.
“Today's portable applications continue to demand increasingly smaller solution sizes without compromising on specifications or performance,” noted Ralf Muenster, director of marketing for power products. “Micrel's new MIC5320 and MIC5321 allow engineers to reduce the footprint of their solution by an astounding 71 percent when compared to standard 3-by-3 mm packaged solutions commonly available in the market.” The LDOs are suited for cellular phones, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players (PMP) and PC cameras.
The MIC5320 provides a PSRR of at least 65 dB for general purpose or digital applications. This device eliminates the usual bypass capacitor and provides two enable pins for applications requiring sequenced start-up. The MIC5321 device maintains its high PSRR (at least 75 dB) under low input voltage-to-output voltage conditions. A bypass pin is provided for additional noise filtering. Both devices feature low quiescent current , a turn-on time of 30 microseconds (for the MIC5320; 45 microseconds for the MIC5321), current limit and thermal shutdown protection, and are rated for operation over -40 to +125°C.
Micrel , 1-408-944-0800, www.micrel.com