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News

New 3.3 V buck-boost regulator with compact 4.9 mm by 3.0 mm footprint

Vishay Electronic : 21 July, 2004  (New Product)
A new buck-boost regulator that offers designers a simple, low-cost solution for obtaining a stable voltage from the batteries in portable electronic systems was announced today by Siliconix incorporated, an 80.4%-owned subsidiary of Vishay Intertechnology, Inc.
A new buck-boost regulator that offers designers a simple, low-cost solution for obtaining a stable voltage from the batteries in portable electronic systems was announced today by Siliconix incorporated, an 80.4%-owned subsidiary of Vishay Intertechnology, Inc.

The new Vishay Siliconix SiP1759 provides a stable 3.3 V fixed output or 2.5 V to 5.5 V variable output voltage with a 1.6 V to 5.5 V input voltage range. The new regulator is designed for handheld, battery-powered equipment including digital cameras, PDAs, MP3 players, camcorders, cell phones, and drivers for flashlights using white LEDs.

Serving as a pin-for-pin replacement for the MAX1759 charge-pump dc to dc converter and available in the same 10-pin MSOP package, the SiP1759 measures just 4.9 mm by 3.0 mm by 1.1 mm and requires only three compact external ceramic capacitors.

Suitable for use with equipment using lithium-ion, nickel metal-hydride, and alkaline batteries, the device produces a regulated 3.3 V output for batteries above or below 3.3 V and provides maximum useful battery life down to 1.6 V.

The new Vishay Siliconix regulator offers 100 mA guaranteed output current, as well as 60 A quiescent current and less than 1 A current in shutdown mode. The device's 1.5 MHz operating frequency helps to reduce capacitor size. Foldback short-circuit protection reduces power dissipation and battery current drain, and a soft-start feature limits inrush current to avoid stressing components as the system powers up. An open-collector digital power-OK output pin signals when the output is out of regulation.

Samples and production quantities of the SiP1759 are available now, with lead times of 8 to 12 weeks for larger orders.
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