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Tiny dual ULDO provides 300mA per output

Posted: 02 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Bluetooth? Wi-Fi? regulator? DSP? ULDO?

Micrel Inc. has launched a new addition to its family of tiny dual ULDO linear regulators. The MIC5335 offers a record 300mA/channel in a tiny 1.6-by-1.6mm MLF package with a package height of just 0.6mm. The devices are targeted at advanced portable applications including cellular phone RF power, camera modules, imaging sensors for digital still and video cameras, PDAs, portable media players and PC cameras. The MIC5335 is currently available in volume, with pricing starting at 75 cents for 1,000 quantities.

"The MIC5335 is the smallest dual LDO on the market capable of providing 300mA per output," said Ralf Muenster, Micrel's director of marketing for power products. "As today's mobile phones move from voice to media centric devices, current requirements for applications such as Bluetooth, WLAN, Wi-Fi, camera accelerator DSPs and RF circuitry are also increasing. Micrel's new chip provides system designers with the smallest possible form factor for these demanding applications."

The MIC5335 also promises the industry's lowest dropout for a 300mA dual LDO with 75mV@300mA, allowing longer battery life and a high PSRR (>65db@1kHz) under low input-to-output voltage conditions typically encountered when powering RF circuitry from a Li-ion battery.

The device integrates two independently controlled high-performance LDOs that offer high transient performance while requiring only very small and inexpensive 1?F ceramic capacitors. The part is offered in a thermally enhanced 6-pin leadless MLF package that parallels the form factor of bumped dies without the drawbacks in manufacturability and the low thermal performance of chip scale packages.

The device features a low quiescent current, a fast turn-on time of 30?s, current limit and thermal shutdown protection, and can operate from -40C to 125C.

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