SILICONIX, represented in Australia by Braemac , announces the release of 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.
It ensures a stable 3.3V fixed output for lithium-ion, nickel metal-hydride (NiMH), and alkaline batteries above or below 3.3V or a 2.5V-5.5V variable output voltage with a 1.6V-5.5V input voltage range.
It offers designers a pin for pin replacement for the MAX1759 charge-pump dc/dc converter and is available in the same 10-pin MSOP package. Its operating frequency of 1.5MHz helps to reduce capacitor size. It has foldback short-circuit protection for reduced power dissipation and battery current drain. It limits inrush current with a soft-start circuit to avoid stressing components as the system powers up. It provides an open-collector digital power-OK output pin to signal when the output is out of regulation.
It is suited to voltage regulation in handheld, battery-powered equipment.