Austriamicrosystems Unveils 5V 130mA Step-Up dc–dc Converter
Austriamicrosystems AG announced the AS1321, a high efficiency step-up dc–dc converter with a fully integrated synchronous rectifier.
The AS1321 improves on the performance of the existing AS1320 while boosting the output voltage to 5V. With a supply voltage of 1.5 to 5.0V the AS1321 is capable of delivering a 130mA output current at 2V input voltage. With an efficiency of 96% the AS1321 is the ideal solution for battery powered portable applications that require a 5.0V supply voltage.
"The high output current combined with the low power consumption makes the AS1321 an ideal solution for battery powered devices like medical and diagnostics devices, digital cameras, PDA's and smart phones, cordless phones and other handheld products," said Walter Moshammer, marketing director for standard linear at austriamicrosystems. "The AS1321 is also particularly well suited for dual-cell powered battery devices."
The AS1321 features a shutdown mode where it draws less than 1uA. In this mode the battery is connected directly to the output to enable direct battery feed-through. This enables the input battery to be used as backup or as a real-time clock supply when the converter is off and eliminates the need for an expensive back-up battery. To ensure stable operation the integrated power–on reset circuitry enables the AS1321 to reset any type of microprocessor after power up ensuring a stable start in all devices. The AS1321 is available in a SOT23-6pin package.
