20V-input converters reach 96% efficiency

austriamicrosystems has raised the efficiency benchmark to 96% for stepdown DC/DC converters suitable for use with input voltages above 12V.

The AS1341 operates from an input voltage between 4.5V and 20V, and can provide an adjustable output voltage from 1.25V to the input voltage or a fixed 5V output. The maximum rated load current is 600mA.

A 100% duty cycle LDO mode with 250mV dropout enhances efficiency when the input voltage is within range of the output voltage.

Also, to maintain efficiency under light-load conditions, the device has a quiescent current of 12µA. In shutdown mode, current draw is reduced to 0.8µA, which enhances battery life in portable applications.

By supporting switching frequencies up to 200kHz, the AS1341 can be used with small-outline surface-mount inductors and capacitors, delivering board-space savings in addition to saving power throughout all operating modes.

 

FEATURES Power-good output Internal 0.4Ω P-channel MOSFET Current-limited architecture Thermal shutdown 3mm x 3mm TDFN-8 package

APPLICATIONS Distributed power systems Keep-alive supplies Field test equipment Portable data terminals

 

 

 

Development board AS1341 EB is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

austriamicrosystems: AS1341