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Micrel ULDOs target ultrathin portable apps

Posted: 31 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ULDO? linear regulator? Micrel? regulators? power management?

Micrel Inc. has launched a new family of single ultralow dropout voltage (ULDO) linear regulators housed in a tiny 1.2-by-1.6-by-0.6mm MLF package. The MIC5302 and the MIC5303 both shrink the solution footprint by more than 50 percent when compared to 2-by-2mm MLF and SC-70 packages.

Ultrathin portables
The devices are targeted for today's most demanding ultrathin portable applications including mobile phones, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players and PC cameras. Both devices are available immediately with pricing starting at 36 cents for the MIC5302 and at 42 cents for the MIC5303 in 1,000 quantities.

"The tiny MLF packages in which Micrel has introduced these new products are comparable to chipscale packaging in size with the added advantage of a 2-fold improvement in thermal performance," noted Ralf Muenster, Micrel's director of marketing for power products. "Micrel's new family of ULDO regulators has been launched at a time when portable designers are challenged to fit an overwhelming number of features into the sleekest form factors. Our new miniature voltage regulators provide designers with the flexibility to fit their power supply needs into the smallest crevices left on their boards."

Ultrasmall LDOs
The MIC5302 and the MIC5303 are part of a new family of ultrasmall single LDOs offering ultralow dropout voltage of 50mV at 150mA and 100mV at 300mA, respectively. The devices offer more than 65db power supply ripple rejection (PSRR) without the need for a bypass capacitor, saving both board space and cost. The MIC5302/03 achieves excellent transient performance with the use of a tiny 1?F ceramic output capacitor. Additionally, this family of ICs features low quiescent current (85?A typically), fast turn-on time (35?s), current limit and thermal shutdown protection and operates over a wide temperature range, from -40C to 125C.

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