Product category:
Power Supply ICs and Controllers
News Release from: Vishay Siliconix | Subject: SiP1759
Edited by the Electronicstalk Editorial
Team on 23 July 2004
3.3V buck-boost regulator keeps it
stable
A new buck-boost regulator offers designers a simple low-cost solution for obtaining a stable voltage from the batteries in portable electronic systems.
A new buck-boost regulator offers designers a simple low-cost solution for obtaining a stable voltage from the batteries in portable electronic systems The new Vishay Siliconix SiP1759 provides a stable 3.3V fixed output or 2.5 to 5.5V variable output voltage from a 1.6 to 5.5V input voltage range
This article was originally published on Electronicstalk on 17 Jun 2003 at 8.00am (UK)
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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/DC convertor and available in the same 10-pin MSOP package, the SiP1759 measures just 4.9 x 3.0 x 1.1mm and requires only three compact external ceramic capacitors.
Suitable for use with equipment using lithium-ion, nickel metal-hydride (NiMH), and alkaline batteries, the device produces a regulated 3.3V output for batteries above or below 3.3V and provides maximum useful battery life down to 1.6V.
The new Vishay Siliconix regulator offers 100mA guaranteed output current, as well as 60uA quiescent current and less than 1uA current in shutdown mode.
The device's 1.5MHz 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.
Pricing for US delivery is $1.95 for quantities of 1000 pieces or more.
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