austriamicrosystems Introduces 9µVRMS Low-Noise 300mA LDO With Power-OK Flag
austriamicrosystems announced an expansion of its low dropout regulator (LDO) portfolio with the AS1358/59/61/62 family optimized to deliver what is described as outstanding noise performance of less than 9µVRMS and up to 92dB PSRR (@ 1kHz typ).
The AS1358/59/61/62 family, operating from a 2 to 5.5V supply, is an LDO well-suited for dual or triple standard-cell and single Li-Ion battery powered applications. With a low dropout voltage of 70mV typ @ 150mA and 140mV typ @ 300mA (AS1359/62 only) at a low current of only 40µA typ during operation and 9nA typ during shutdown, battery life time can be maximized using these new ultra-low-noise ICs.
"AS1358/59/61/62 are the LDOs of choice for powering circuits that require a low-noise supply, such as RF, cell-phone cameras, wireless base stations and PA bias supplies", said Walter Moshammer, Marketing Director Standard Linear at austriamicrosystems. "Offering low dropout voltage as well as low quiescent current, this ultra-low-noise LDO family is ideally suited for any battery-powered device."
The AS1358/59/61/62 family offers pre-programmed output voltages in the range between 1.4 to 4.5V with an output voltage accuracy of 1% (@ 300mA). An additional feature of the AS1361/62 is a power-ok output that signals when the output voltage drops out of regulation.
A digital enabled pin with a turn-on time of only 300µs allows system-level dynamic power management. Furthermore, the devices offer over-temperature and over-current protection. With the choice of between 150mA (AS1358/61) and 300mA (AS1359/62) output current, the new ultra-low-noise LDO family delivers sufficient power for a wide range of applications.
The AS1358/59 are available in a 5-pin TSOT23 package and the AS1361/62 are available in a 6-pin TSOT23 package, both suitable for operating environments ranging from -40 to +85°C.
