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Step-down DC/DC converter suits data-storage apps

Posted: 11 Jul 2006     Print Version  Bookmark and Share

Keywords:STMicroelectronics  ST1S06  DC/DC converter 

STMicroelectronics (ST) has introduced an advanced high-frequency step-down DC/DC converter particularly suited for use in data-storage applications, such as hard disc drives, DVDs, Blu-ray discs, high-definition DVDs and in portable devices, such as MP3 players and digital cameras, that require high efficiency, small size and light weight.

ST said the ST1S06 integrates functions that deliver excellent electrical performance while minimizing the need for external components. A successor of the previous ST1S03 and ST1S03A switching voltage regulators, the ST1S06 includes a synchronous rectification block to avoid the use of an external Schottky diode while improving the device's efficiency up to 95 per cent.

Other key features of the ST1S06 include an output current capability of 1.5A maximum over all operating conditions, a high switching frequency of 1.5MHz and great stability, ST said.

In addition, the ST1S06 provides a soft-start, which prevents inrush current and minimizes start-up problems in battery-powered devices. The device is available with fixed output voltages or in the adjustable version that, using an external resistor divider, generates an output voltage adjustable from 0.8V feedback voltage.

Built using the company's proprietary BCD6 smart-power technology, the ST1S06 is designed in Italy and South China, diffused in the US, and assembled in Malaysia. The device is offered in two versions: with and without an enable feature. Both versions are available in the DFN6 3-by-3mm ECOPACK package. The voltage regulator can be combined with several codified versions of a demo board for evaluation purposes.

Already in production, pricing ranges from Rs.16.04 (35 cents) to Rs.20.62 (45 cents) for very high volume orders.




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