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PMIC enables flexible sequencing in handheld apps

Posted: 28 Apr 2010 ?? ?Print Version ?Bookmark and Share

Keywords:power management? PMIC? DC/DC converter?


Micrel Inc. is rolling out the MIC23060 power management IC (PMIC) that integrates a high-efficiency DC/DC converter with the company's HyperLight Load technology and a post regulating, low voltage-capable low dropout regulator.

The solution includes a flexible sequencing feature that allows users to configure the device for processors. Targeted applications include mobile phones, PDAs, digital cameras and DSP power supplies.

The high 4MHz operating frequency of the MIC23060 allows the use of small external components and reduces output ripple. The PMIC provides every potential combination of turn-on and turn-off sequencing of the two outputs by connecting two pins either high or low, by and using a single GPIO to enable and disable the DC/DC and LDO outputs. The LDO is designed to power directly from the battery and/or post regulate from the output of the DC/DC converter for high system efficiency. In applications where the LDO is enabled prior to the DC/DC, the LDO is first powered by the system input voltage (typically a battery source). Once the DC/DC is enabled, the input to the LDO seamlessly transitions to the post-regulated output of the DC/DC converter.

"With handheld and mobile applications clamoring for longer battery life, the need to manage power efficiently continues to be one of the highest design priorities," noted Andy Khayat, director, portable business unit, Micrel. Micrel's MIC23060 offers very high efficiency and completely flexible sequencing for today's portable devices."

The IC is currently available in volume and priced at $2.20 for 1,000 units.

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