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Power management ICs flaunt 3V dropout

Posted: 16 Dec 2011 ?? ?Print Version ?Bookmark and Share

Keywords:step-down converter? buck regulator? PMIC? SSD?

Texas Instruments Inc. (TI) has launched a portfolio of single-chip, power management integrated circuits (PMICs). The LM10504, LM10503 and LM10506 improve reliability and lessen system cost and development time. According to the company, the PMICs can be used for powering supply rails in SSDs, hybrid drives and other flash memory management applications.

TI's PMICs integrate three programmable 2.25MHz DC/DC step-down converters that support core processor, memory and I/O voltages, along with a general purpose, 3V 250mA LDO regulator for host controller reference. Additional features include a power saving deep sleep mode, built-in current limit and thermal protection, and power-down data protection.

LM10503/4/6

TI's PMICs integrate three programmable 2.25MHz DC/DC step-down converters.

Each PMIC functions cooperatively with a controller IC to optimize the supply voltage for low power conditions and features a deep sleep mode option that lowers the core ASIC voltage and turns off flash and input/output rails to obtain maximum system efficiency, noted TI. The LM10504 and LM10506 also include power-down data protection that ensures the SSD controller completes the writing operation during unexpected power failure.

The LM10504 is a flexible PMIC for a range of large and small, client and consumer SSD form factors including 3.5in, 2.5in, 1.8in, mSATA, Micro SATA, Half-Slim SATA, mini PCIe and integrated SSD.

The LM10503 is a higher current, 2A PMIC designed for power-hungry controllers used in enterprise SSDs. It features the National PowerWise adaptive voltage scaling technology from TI for reducing the power consumption of SSD controllers and increasing system power efficiency.

The LM10506 is the smallest PMIC designed for ultra-portable applications in space-constrained SSDs.

Each PMIC integrates three buck regulators with internal FETs. The buck regulators are SPI-programmable to supply variable voltages at up to 95 percent peak efficiency. The devices have deep sleep modes that save power during idle times.

The PMICs are available in volume from TI and its authorized distributors. The LM10504 and LM10506 PMICs are offered in a 34-pin micro SMD package measuring 2.8 x 2.8mm with 0.4mm pitch. The suggested retail price is $1.90 and $1.60, respectively, in 1,000-unit quantities. The LM10503 is offered in a 36-pin LLP package measuring 6 x 6mm and is priced at $3.90 .





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