Regulators extend battery life by up to six hours

Battery-powered devices can run for up to six hours longer by using the AS1329 boost converter, from austriamicrosystems, which is able to maintain an output voltage between 2.5V to 5.0V even when the battery voltage has decayed as low as 0.65V.

The AS1329 is optimised for use as the main DC/DC regulator in products operating from a lithium battery or single AA cell, and enables longer battery life by combining its low-input capability with higher operating efficiency compared to competing devices.

The closest alternative device requires a battery voltage of at least 0.9V.

Three variants of the AS1329 are available, providing a choice of power-saving schemes. The AS1329A implements pulse-skipping for power saving under medium- and light-load conditions, while the AS1329B is optimised for ultra-low power at light loads only. For applications where predictable and straightforward filtering of output noise is a priority, the AS1329C delivers the advantages of high operating efficiency and low input voltage with fixed-frequency operation at all loads.

In addition to delivering power-saving advantages, these devices also operate at 1.2MHz switching frequency, which saves PCB space by allowing small inductors and ceramic capacitors.

 

FEATURES 95% efficiency 160mA supply current @ 3.3V from single AA cell 0.65V start-up voltage Internal PMOS synchronous rectifier Anti-ringing control

APPLICATIONS Medical diagnostic equipment Hand-held instruments PC cards Remote wireless transmitters LCD bias supplies

 

 

 

Austriamicrosystems AS1329 Regulators